From owner-wrec@cs.utk.edu Thu Jun 1 12:20:20 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id MAA26645 for ; Thu, 1 Jun 2000 12:20:19 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id MAA12696; Thu, 1 Jun 2000 12:13:27 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Thu, 1 Jun 2000 12:13:27 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id MAA12677; Thu, 1 Jun 2000 12:13:26 -0400 (EDT) Received: from finch-post-10.mail.demon.net (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id MAA12664; Thu, 1 Jun 2000 12:13:24 -0400 (EDT) Received: from finch-post-10.mail.demon.net (194.217.242.38 -> finch-post-10.mail.demon.net) by cs.utk.edu (smtpshim v1.0); Thu, 1 Jun 2000 12:13:25 -0400 Received: from alethea.demon.co.uk ([194.222.10.198] helo=IAN-NTLAP) by finch-post-10.mail.demon.net with smtp (Exim 2.12 #1) id 12xXaw-0005FD-0A for wrec@cs.utk.edu; Thu, 1 Jun 2000 16:13:18 +0000 From: Ian Cooper To: wrec@cs.utk.edu Subject: inter-cache mailing list down Date: Thu, 01 Jun 2000 17:12:59 +0100 Organization: Mirror Image Internet Message-ID: X-Mailer: Forte Agent 1.8/32.548 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit List-Unsubscribe: Content-Transfer-Encoding: 7bit Once again, apologies for the noise. I've had it brought to my attention that the inter-cache list is currently down. If you'd like to join, please mail me privately (those who have already pointed out the problem or made personal enquiries need not do so again) and I will subscribe you once things are sorted. Details of how to subscribe are in an appendix of the draft I submitted yesterday, and I should imagine that the problem will be resolved by Monday. From owner-wrec@cs.utk.edu Thu Jun 1 16:44:39 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id QAA03196 for ; Thu, 1 Jun 2000 16:44:38 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id QAA10994; Thu, 1 Jun 2000 16:39:56 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Thu, 1 Jun 2000 16:39:55 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id QAA10974; Thu, 1 Jun 2000 16:39:55 -0400 (EDT) Received: from bbcr.uwaterloo.ca (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id QAA10940; Thu, 1 Jun 2000 16:39:41 -0400 (EDT) Received: from bbcr.uwaterloo.ca (129.97.34.2 -> bbcr.uwaterloo.ca) by cs.utk.edu (smtpshim v1.0); Thu, 1 Jun 2000 16:39:47 -0400 Received: from [129.97.74.190] ([129.97.74.190]) by bbcr.uwaterloo.ca (8.8.8/8.8.8) with ESMTP id QAA19980 for ; Thu, 1 Jun 2000 16:39:38 -0400 (EDT) X-Sender: jwwong@bbcr.uwaterloo.ca Message-Id: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Thu, 1 Jun 2000 17:01:08 -0400 To: webrepl@cs.utk.edu From: Johnny Wong Subject: Workshop on Electronic Commerce List-Unsubscribe: Please accept my apologies if you receive multiple copies of this announcement. Johnny Wong -------------------------------------------------------------------------------- Call for Participation Third International Workshop on Technological Challenges of Electronic Commerce University of Waterloo Waterloo, Ontario, Canada June 28-29, 2000 Sponsored by IBM Centre for Advanced Studies Bell University Labs at the University of Waterloo Institute for Global Electronic Commerce, U. of Maryland Baltimore County http://cas.ibm.com/EC2000/ec-2000.html The rapid development of the Internet is changing the way commerce is conducted, and is leading to economic globalization. Electronic commerce is becoming a major channel for conducting business, with increasing number of organizations developing, deploying and installing electronic commerce products, applications and solutions. The goal of this workshop is to share and disseminate information about important current research and development issues concerning electronic commerce, by bringing together leading researchers and developers in this area. We will provide an opportunity to review the state of the art in the enabling technologies for electronic commerce, as well as create a forum for academia, government and industry to identify future technological challenges. The workshop will feature invited speakers, presentations, and discussions. The technical program will also include tutorial and breakout sessions. Tutorial on wireless e-commerce, computing finance, and IP security are tentatively scheduled. The breakout sessions will focus on EC architectures and solutions, security and privacy, legal and policy issues, EC from the user's perspective, user interface and intelligent agents, and EC education. The program will conclude with a wrap-up plenary. Technical program: http://cas.ibm.com/EC2000/tech_prog.html Registration information: http://cas.ibm.com/EC2000/registration.html Hotel information: http://cas.ibm.com/EC2000/hotel.html Honorary Chairs For further information, contact Johnny Wong, U. of Waterloo Weidong Kou Gabby Silberman, IBM CAS IBM Centre for Advanced Studies Haig Baronikian, Bell Canada 1150 Eglinton Avenue East Shlomo Carmi, UMBC Toronto, ON, Canada, M3C 1H7 Phone: +1 (416) 448 2614 General Co-Chairs email: kdong@ca.ibm.com Weidong Kou, IBM CAS Yelena Yesha, UMBC Local Arrangements Chair Jean Webster, U. of Waterloo -------- J. W. Wong Professor, Computer Science Director, Institute for Computer Research University of Waterloo Waterloo, Ontario, Canada N2L 3G1 Phone: 519-888-4431 fax: 519-885-1208 From owner-wrec@cs.utk.edu Fri Jun 2 21:28:39 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id VAA18222 for ; Fri, 2 Jun 2000 21:28:38 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id VAA07576; Fri, 2 Jun 2000 21:23:20 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Fri, 2 Jun 2000 21:23:20 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id VAA07556; Fri, 2 Jun 2000 21:23:19 -0400 (EDT) Received: from omega.cisco.com (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id VAA07542; Fri, 2 Jun 2000 21:23:14 -0400 (EDT) Received: from omega.cisco.com (171.69.63.141 -> omega.cisco.com) by cs.utk.edu (smtpshim v1.0); Fri, 2 Jun 2000 21:23:14 -0400 Received: from dli2-nt (dhcp-10-34-17-66.cisco.com [10.34.17.66]) by omega.cisco.com (8.8.8-Cisco List Logging/8.8.8) with ESMTP id SAA26178; Fri, 2 Jun 2000 18:23:11 -0700 (PDT) Message-Id: <4.2.0.58.20000602181907.00da3b70@omega> X-Sender: lidan@omega X-Mailer: QUALCOMM Windows Eudora Pro Version 4.2.0.58 Date: Fri, 02 Jun 2000 18:23:58 -0700 To: wrec@cs.utk.edu From: Dan Li Subject: the slides on web cache invalidation protocol Cc: Pei Cao Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="=====================_279848691==_" List-Unsubscribe: --=====================_279848691==_ Content-Type: text/plain; charset="us-ascii"; format=flowed Hi, here is the slides on WCIP presented in the recent caching workshop. It's mostly a bag of ideas, a better write-up is on the way. Please comment, if you are interested in working on it. Thanks! 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//////////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////// //////////////////////////////7/AAAEAAIAAAAAAAAAAAAAAAAAAAAAAAIAAAAC1c3VnC4b EJOXCAArLPmuRAAAAAXVzdWcLhsQk5cIACss+a40AwAA8AIAAA8AAAABAAAAgAAAAAMAAACIAAAA BAAAAKAAAAAGAAAAqAAAAAcAAACwAAAACAAAALgAAAAJAAAAwAAAAAoAAADIAAAAFwAAANAAAAAL AAAA2AAAABAAAADgAAAAEwAAAOgAAAAWAAAA8AAAAA0AAAD4AAAADAAAAI8CAAACAAAA5AQAAB4A AAAPAAAAT24tc2NyZWVuIFNob3cAAAMAAACx0gAAAwAAAGYAAAADAAAADQAAAAMAAAADAAAAAwAA AAAAAAADAAAAAAAAAAMAAAAxFQgACwAAAAAAAAALAAAAAAAAAAsAAAAAAAAACwAAAAAAAAAeEAAA EgAAABAAAABUaW1lcyBOZXcgUm9tYW4ABgAAAEFyaWFsAA8AAABNb25vdHlwZSBTb3J0cwAMAAAA Q291cmllciBOZXcAGgAAAFJlcG9ydGluZyBQcm9ncmVzcyAobG9uZykAJgAAAFdDSVA6IFdlYiBD YWNoZSBJbnZhbGlkYXRpb24gUHJvdG9jb2wAJAAAAFByb2JsZW06IFNjYWxhYmxlIFdlYiBQcm94 eSBDYWNoaW5nABcAAABXZWItYmFzZWQgQXBwbGljYXRpb25zAAUAAABXQ0lQAA0AAABXQ0lQOiBz dGVwIDEADQAAAFdDSVA6IHN0ZXAgMgANAAAAV0NJUDogc3RlcCAzAAsAAABGcmVzaG5lc3MgABQA AABGcmVzaG5lc3MgR3VhcmFudGVlAB8AAABUcmFuc3BhcmVudCBDYWNoZXMgb24gdGhlIHBhdGgA FgAAAFRhcmdldGVkIEludmFsaWRhdGlvbgAKAAAAU2VjdXJpdHkgABEAAABXb3JrIGluIHByb2dy ZXNzAAwQAAAGAAAAHgAAAAsAAABGb250cyBVc2VkAAMAAAAEAAAAHgAAABAAAABEZXNpZ24gVGVt cGxhdGUAAwAAAAEAAAAeAAAADQAAAFNsaWRlIFRpdGxlcwADAAAADQAAAACYAAAAAwAAAAAAAAAg AAAAAQAAADYAAAACAAAAPgAAAAEAAAACAAAACgAAAF9QSURfR1VJRAACAAAA5AQAAEEAAABOAAAA ewAyADYAOQAyADgANABFADAALQAyAEQAQgBFAC0AMQAxAEQANAAtADkARAAzAEUALQAwADAANQAw AEQAQQAwAEIARAA1ADEAMwB9AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAA= --=====================_279848691==_-- From owner-wrec@cs.utk.edu Sun Jun 4 20:50:22 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id UAA10780 for ; Sun, 4 Jun 2000 20:50:22 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id UAA21694; Sun, 4 Jun 2000 20:45:16 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Sun, 4 Jun 2000 20:45:16 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id UAA21676; Sun, 4 Jun 2000 20:45:15 -0400 (EDT) Received: from ircache.net (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id UAA21663; Sun, 4 Jun 2000 20:45:13 -0400 (EDT) Received: from ircache.net (192.52.106.29 -> ack.ircache.net) by cs.utk.edu (smtpshim v1.0); Sun, 4 Jun 2000 20:45:13 -0400 Received: from surf.ircache.net (surf.scd.ucar.edu [128.117.28.53]) by ircache.net (8.8.6/8.8.6) with ESMTP id RAA08494 for ; Sun, 4 Jun 2000 17:45:12 -0700 (PDT) Received: from localhost (wessels@localhost) by surf.ircache.net (8.8.6/8.8.6) with ESMTP id SAA29878 for ; Sun, 4 Jun 2000 18:45:06 -0600 (MDT) Date: Sun, 4 Jun 2000 18:45:06 -0600 From: Duane Wessels To: wrec@cs.utk.edu Subject: HTTP compliance Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII List-Unsubscribe: During the workshop in Lisbon, many people mentioned the need for HTTP compliance tests. An analogy was made to the "connect-a-thon" that Sun has organized for NFS implementations. One nice feature of the connect-a-thon is that participating companies can not use the results to claim compliance in their marketing literature. It seems to be an engineering-only event to ensure that products interoperate with each other. My group would very much like to take on this role for HTTP compliance/interoperation testing. We are interested in developing software for vendors and others to use. We are willing to host "HTTP-a-thon" events if vendors would find it useful. Unfortunately, we probably don't have the resources at this time to pull it off. We need money to hire a programmer/coordinator. What follows is our plan for making it happen: 1) We create a "consortium" of sorts to fund the development. The members are vendors and others interested in HTTP compliance software and tests. Given that the discussion originated in the context of caching, we expect many members to be companies that have caching products. 2) Companies pay an annual membership fee of $20k (+/- $5k). Our goal is to collect about $200/year for this project. This money pays for salary, equipment, travel, etc. 3) Development is driven by the needs and desires of the members. That is, members decide which features and tests are most important. I envision something democratic -- one vote per member. 4) My group implements the desired features, and provides support for the software. 5) Members have immediate access to software releases. Software is released to non-members after a period of six months (or so). Members are bound to specific terms of use. Results may not be used in marketing literature. This is our proposal; nothing has been set in stone. I'm eager to find out if vendors and others think its a workable model. Feel free to follow up on this list, or reply to me personally. Duane W. From owner-wrec@cs.utk.edu Sun Jun 4 23:07:28 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id XAA13210 for ; Sun, 4 Jun 2000 23:07:28 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id XAA00818; Sun, 4 Jun 2000 23:03:12 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Sun, 4 Jun 2000 23:03:12 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id XAA00800; Sun, 4 Jun 2000 23:03:12 -0400 (EDT) Received: from fozzie.sanmateo.akamai.com (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id XAA00787; Sun, 4 Jun 2000 23:03:10 -0400 (EDT) Received: from fozzie.sanmateo.akamai.com (63.196.237.2 -> fw.west.akamai.com) by cs.utk.edu (smtpshim v1.0); Sun, 4 Jun 2000 23:03:10 -0400 Received: from marjorie.sanmateo.akamai.com (IDENT:root@marjorie.sanmateo.akamai.com [172.23.1.15]) by fozzie.sanmateo.akamai.com (8.9.3/8.9.3) with ESMTP id UAA19312; Sun, 4 Jun 2000 20:01:23 -0700 (PDT) Received: (from mnot@localhost) by marjorie.sanmateo.akamai.com (8.9.3/8.9.3) id UAA06989; Sun, 4 Jun 2000 20:02:59 -0700 Date: Sun, 4 Jun 2000 20:02:59 -0700 From: Mark C Nottingham To: Duane Wessels Cc: wrec@cs.utk.edu Subject: Re: HTTP compliance Message-ID: <20000604200255.A6952@akamai.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2i In-Reply-To: ; from wessels@ircache.net on Sun, Jun 04, 2000 at 06:45:06PM -0600 List-Unsubscribe: Duane, I (and everyone I talked to) think that you guys are a natural for this sort of project, mostly because you're already in the testing business. As long as the focus stays on the engineering level, and away from making it competitive, this will be great. Others will have more intelligent things to say about the organisation of funding, membership, etc., but it would be nice if vendors who aren't directly participating weren't cut out (e.g., six-month code delay), as they're generally the people who need the most help. How is the connect-a-thon organised in this respect? A few points for discussion; * What are the target devices for such tests? Describing server and client as well as proxy/surrogate tests is useful, but much more work, and it may turn out quite a bit harder (and more disruptive) to pull the vendors on board. I'd recommend starting with proxy/surrogate devices, and eventually expanding into clients and servers if there's enough interest. * What kinds of tests? The most obvious goal is to prove full 1.1 compliance, according to stated RFC2119 requirements. I think most people realise that doing so is actually a very difficult task, because of all of the possible permutations of HTTP mechanisms, etc that present themselves. As I said in Lisbon, my interest is primarily in assuring that caches operate in a predictable way to content providers; while we could test to make sure that each message is well-formed, etc., IMHO that won't be necessary, as it's already in the best interests of the vendor to do so. It may be more realistic to define a relatively small group of relevant tests to start with, making it easier to get a first go at it out quickly, to gauge response and hopefully have some positive effects ASAP. Finally, I'd be very surprised if any of the commercial vendors who showed interest didn't have a pre-existing compliance engine that they use interally. If one could be convinced/arm-twisted that it would be in their best interests to donate it (or a portion), we'd save a lot of effort. Cheers, On Sun, Jun 04, 2000 at 06:45:06PM -0600, Duane Wessels wrote: > During the workshop in Lisbon, many people mentioned the need for HTTP > compliance tests. An analogy was made to the "connect-a-thon" that Sun > has organized for NFS implementations. One nice feature of the > connect-a-thon is that participating companies can not use the results > to claim compliance in their marketing literature. It seems to be an > engineering-only event to ensure that products interoperate with each > other. > > My group would very much like to take on this role for HTTP > compliance/interoperation testing. We are interested in developing > software for vendors and others to use. We are willing to host > "HTTP-a-thon" events if vendors would find it useful. > > Unfortunately, we probably don't have the resources at this time to > pull it off. We need money to hire a programmer/coordinator. What > follows is our plan for making it happen: > [snip] > > This is our proposal; nothing has been set in stone. I'm eager to find > out if vendors and others think its a workable model. Feel free to > follow up on this list, or reply to me personally. -- Mark Nottingham, Senior Developer Akamai Technologies (San Mateo, CA) From owner-wrec@cs.utk.edu Mon Jun 5 09:47:21 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id JAA02265 for ; Mon, 5 Jun 2000 09:47:20 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id JAA17442; Mon, 5 Jun 2000 09:42:09 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Mon, 5 Jun 2000 09:42:09 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id JAA17424; Mon, 5 Jun 2000 09:42:08 -0400 (EDT) Received: from pail.ircache.net (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id JAA17410; Mon, 5 Jun 2000 09:42:06 -0400 (EDT) Received: from pail.ircache.net (128.117.28.5 -> pail.scd.ucar.edu) by cs.utk.edu (smtpshim v1.0); Mon, 5 Jun 2000 09:42:06 -0400 Received: from localhost (rousskov@localhost) by pail.ircache.net (8.9.2/8.8.7) with ESMTP id HAA44129; Mon, 5 Jun 2000 07:42:03 -0600 (MDT) (envelope-from rousskov@ircache.net) Date: Mon, 5 Jun 2000 07:42:03 -0600 (MDT) From: Alex Rousskov To: Mark C Nottingham cc: wrec@cs.utk.edu Subject: Re: HTTP compliance In-Reply-To: <20000604200255.A6952@akamai.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII List-Unsubscribe: On Sun, 4 Jun 2000, Mark C Nottingham wrote: > Others will have more intelligent things to say about the organisation of > funding, membership, etc., but it would be nice if vendors who aren't > directly participating weren't cut out (e.g., six-month code delay), as > they're generally the people who need the most help. We would be more than happy to cut nobody out. However, there are two problems that are hard to solve if you allow free timely access to the tool: - a not-for-marketing license would be nearly impossible to enforce; a company or a magazine are likely to violate the licensing terms (knowingly or not) and publish claims of [non]compliance. - there is not much incentive for vendors to pay for the development if they can get the tool anyway (just look at the number of Polygraph sponsors versus the number of caching vendors who use the tool) > How is the connect-a-thon organised in this respect? It will probably up to the participants to decide. IMO, connect-a-thon will not be very useful for these kinds of tests because the tool will be testing mostly compliance with standards and current practice rather than compatibility with similar software. I suspect that most of the tests can be done in isolation so connect-a-thon will not be required. > * What are the target devices for such tests? > Describing server and client as well as proxy/surrogate tests is useful, but > much more work, and it may turn out quite a bit harder (and more disruptive) > to pull the vendors on board. > > I'd recommend starting with proxy/surrogate devices, and eventually > expanding into clients and servers if there's enough interest. I would make it demand driven. If there is enough interest/support from the server/client community, the tool can include server/client tests. > * What kinds of tests? > The most obvious goal is to prove full 1.1 compliance, according to stated > RFC2119 requirements. I think most people realise that doing so is actually > a very difficult task, because of all of the possible permutations of HTTP > mechanisms, etc that present themselves. Full HTTP/1.1 compliance is a nice goal, but probably not very practical. Again, since the tool is designed for product developers, I would leave the scope for them to decide on. Initial goals should probably be more modest to get some visible progress sooner. > As I said in Lisbon, my interest is primarily in assuring that caches > operate in a predictable way to content providers; while we could test to > make sure that each message is well-formed, etc., IMHO that won't be > necessary, as it's already in the best interests of the vendor to do so. > > It may be more realistic to define a relatively small group of relevant > tests to start with, making it easier to get a first go at it out quickly, > to gauge response and hopefully have some positive effects ASAP. Agree. > Finally, I'd be very surprised if any of the commercial vendors who showed > interest didn't have a pre-existing compliance engine that they use > interally. If one could be convinced/arm-twisted that it would be in their > best interests to donate it (or a portion), we'd save a lot of effort. I am less optimistic after talking to several vendors :). However, we definitely should try to use the results of past developments if any. Thanks, Alex. From owner-wrec@cs.utk.edu Mon Jun 5 11:48:38 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id LAA04956 for ; Mon, 5 Jun 2000 11:48:38 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id LAA27407; Mon, 5 Jun 2000 11:43:49 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Mon, 5 Jun 2000 11:43:49 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id LAA27388; Mon, 5 Jun 2000 11:43:49 -0400 (EDT) Received: from mail-relay1.mirrorimage.net (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id LAA27372; Mon, 5 Jun 2000 11:43:47 -0400 (EDT) Received: from mail-relay1.mirrorimage.net (209.58.140.11) by cs.utk.edu (smtpshim v1.0); Mon, 5 Jun 2000 11:43:47 -0400 Received: from oskarpc (mail-relay1.mirrorimage.net [209.58.140.11]) by mail-relay1.mirrorimage.net (8.9.3/8.9.3) with SMTP id KAA28584 for ; Mon, 5 Jun 2000 10:43:32 -0500 From: "Oskar Batuner" To: Subject: RE: HTTP compliance Date: Mon, 5 Jun 2000 11:42:25 -0400 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2314.1300 In-Reply-To: List-Unsubscribe: X-MIME-Autoconverted: from 8bit to quoted-printable by cs.utk.edu id LAA27407 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by ietf.org id LAA04956 Folks, for me it looks like we are talking about two different possible developments: 1. HTTP compliance tests. 2. Connect-a-thone. A while ago I was in NFS development and connect-a-thon was a very important part of testing. But the way it worked had nearly nothing to do with the protocol compliance testing. Different vendors came together with equipment and software, point clients to other people’s servers and run a group of standardized tests. If our new client has problem with the current version of let's say HP-UX - it does not matter who is in compliance, it just means that WE do have a problem. If such problem is found when both versions are not yet released – you talk to other party, and also look how this specific test works with other people implementations. The primary goal of such tests is inter-vendor compatibility and "current industry practices" definitely dominate over puristic protocol compliance issues. What kind of possible even/alliance are we trying to create? Both have the right to exist. The first one, compliance tests, is kind of more straightforward, one can just write a set of tests with limited interaction with cache/service vendors. Still to be really useful such tests should take into account current practices, the way HTTP is practically implemented, not just seat in the clean room with nothing but the set of RFC's. I agree with Alex that there is no need for all of us to come together for such testing. Tests can be made available as a software package - or alternately run remotely by configuring the test lab and system under test to point to one another. The latter form creates more controllable environment and may prevent some problems Alex is talking about. The form of organization Duane is proposing is best suited exactly for this type of testing. Connect-a-thone may be also a good thing to have. It is especially useful for cache/layerX switch/router vendors - current environment becomes extremely complicated. Too many different devices available, and understanding the source of the problem when interacting with specific device often requires a help of vendor engineers - not just sales support. Service vendors may be interested in both testing possible elements of infrastructure and preventing problems for service customers. The connect-a-thone event may be opened to non-members for some registration fee. My two cents. - Oskar >-----Original Message----- >From: Alex Rousskov [mailto:rousskov@ircache.net] >Sent: Monday, June 05, 2000 9:42 AM >To: Mark C Nottingham >Cc: wrec@cs.utk.edu >Subject: Re: HTTP compliance > > >On Sun, 4 Jun 2000, Mark C Nottingham wrote: > >> Others will have more intelligent things to say about the organisation of >> funding, membership, etc., but it would be nice if vendors who aren't >> directly participating weren't cut out (e.g., six-month code delay), as >> they're generally the people who need the most help. > >We would be more than happy to cut nobody out. However, there are two >problems that are hard to solve if you allow free timely access to the >tool: > > - a not-for-marketing license would be nearly impossible > to enforce; a company or a magazine are likely to violate > the licensing terms (knowingly or not) and publish claims > of [non]compliance. > > - there is not much incentive for vendors to pay for the > development if they can get the tool anyway (just look > at the number of Polygraph sponsors versus the number of > caching vendors who use the tool) > >> How is the connect-a-thon organised in this respect? > >It will probably up to the participants to decide. IMO, connect-a-thon >will not be very useful for these kinds of tests because the tool will >be testing mostly compliance with standards and current practice rather >than compatibility with similar software. I suspect that most of the >tests can be done in isolation so connect-a-thon will not be required. > >> * What are the target devices for such tests? >> Describing server and client as well as proxy/surrogate tests is >useful, but >> much more work, and it may turn out quite a bit harder (and more >disruptive) >> to pull the vendors on board. >> >> I'd recommend starting with proxy/surrogate devices, and eventually >> expanding into clients and servers if there's enough interest. > >I would make it demand driven. If there is enough interest/support from >the server/client community, the tool can include server/client tests. > >> * What kinds of tests? >> The most obvious goal is to prove full 1.1 compliance, according >to stated >> RFC2119 requirements. I think most people realise that doing so >is actually >> a very difficult task, because of all of the possible >permutations of HTTP >> mechanisms, etc that present themselves. > >Full HTTP/1.1 compliance is a nice goal, but probably not very >practical. Again, since the tool is designed for product developers, I >would leave the scope for them to decide on. Initial goals should >probably be more modest to get some visible progress sooner. > >> As I said in Lisbon, my interest is primarily in assuring that caches >> operate in a predictable way to content providers; while we could test to >> make sure that each message is well-formed, etc., IMHO that won't be >> necessary, as it's already in the best interests of the vendor to do so. >> >> It may be more realistic to define a relatively small group of relevant >> tests to start with, making it easier to get a first go at it >out quickly, >> to gauge response and hopefully have some positive effects ASAP. > >Agree. > >> Finally, I'd be very surprised if any of the commercial vendors >who showed >> interest didn't have a pre-existing compliance engine that they use >> interally. If one could be convinced/arm-twisted that it would >be in their >> best interests to donate it (or a portion), we'd save a lot of effort. > >I am less optimistic after talking to several vendors :). However, we >definitely should try to use the results of past developments if any. > >Thanks, > >Alex. > From owner-wrec@cs.utk.edu Mon Jun 5 11:50:54 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id LAA04981 for ; Mon, 5 Jun 2000 11:50:54 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id LAA27980; Mon, 5 Jun 2000 11:45:32 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Mon, 5 Jun 2000 11:45:32 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id LAA27961; Mon, 5 Jun 2000 11:45:31 -0400 (EDT) Received: from 1-132.mnot.net (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id LAA27928; Mon, 5 Jun 2000 11:45:27 -0400 (EDT) Received: from 1-132.mnot.net (63.201.242.106 -> adsl-63-201-242-106.dsl.snfc21.pacbell.net) by cs.utk.edu (smtpshim v1.0); Mon, 5 Jun 2000 11:45:27 -0400 Received: by 1-132.mnot.net (Postfix, from userid 500) id 9968F6600; Mon, 5 Jun 2000 08:48:35 -0700 (PDT) Date: Mon, 5 Jun 2000 08:48:35 -0700 From: Mark Nottingham To: Alex Rousskov Cc: Mark C Nottingham , wrec@cs.utk.edu Subject: Re: HTTP compliance Message-ID: <20000605084835.C24561@mnot.net> References: <20000604200255.A6952@akamai.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2i In-Reply-To: ; from rousskov@ircache.net on Mon, Jun 05, 2000 at 07:42:03AM -0600 List-Unsubscribe: On Mon, Jun 05, 2000 at 07:42:03AM -0600, Alex Rousskov wrote: > > Finally, I'd be very surprised if any of the commercial vendors who showed > > interest didn't have a pre-existing compliance engine that they use > > interally. If one could be convinced/arm-twisted that it would be in their > > best interests to donate it (or a portion), we'd save a lot of effort. > > I am less optimistic after talking to several vendors :). However, we > definitely should try to use the results of past developments if any. *grin* I meant in no way to imply optimism by that statement. -- Mark Nottingham http://www.mnot.net/ From owner-wrec@cs.utk.edu Mon Jun 5 13:43:26 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id NAA07332 for ; Mon, 5 Jun 2000 13:43:26 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id NAA11656; Mon, 5 Jun 2000 13:37:22 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Mon, 5 Jun 2000 13:37:22 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id NAA11638; Mon, 5 Jun 2000 13:37:21 -0400 (EDT) Received: from mnot.sanmateo.akamai.com (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id NAA11624; Mon, 5 Jun 2000 13:37:19 -0400 (EDT) Received: from mnot.sanmateo.akamai.com (63.196.237.2 -> fw.west.akamai.com) by cs.utk.edu (smtpshim v1.0); Mon, 5 Jun 2000 13:37:19 -0400 Received: by mnot.sanmateo.akamai.com (Postfix, from userid 20351) id C87305009; Mon, 5 Jun 2000 10:37:33 -0700 (PDT) Date: Mon, 5 Jun 2000 10:37:33 -0700 From: Mark C Nottingham To: Oskar Batuner Cc: wrec@cs.utk.edu Subject: Re: HTTP compliance Message-ID: <20000605103730.A9042@akamai.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline User-Agent: Mutt/1.2i In-Reply-To: ; from oskar@mirror-image.com on Mon, Jun 05, 2000 at 11:42:25AM -0400 List-Unsubscribe: X-MIME-Autoconverted: from 8bit to quoted-printable by cs.utk.edu id NAA11656 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by ietf.org id NAA07332 Connect-a-thon has been mentioned not as a similar type of test or model for testing, but as a model for how the participants approach the tests. I also agree that people shouldn't have to be in the same room. Regarding current practice vs. clean room, this is good, *as long as* the tests vary from the specification. i.e., it would be good to test for optimal operation, etc., but to declare that common practice supercedes an explicit requirement in the specification is IMHO folly. Cheers, On Mon, Jun 05, 2000 at 11:42:25AM -0400, Oskar Batuner wrote: > Folks, for me it looks like we are talking about two different > possible developments: > > 1. HTTP compliance tests. > 2. Connect-a-thone. > > A while ago I was in NFS development and connect-a-thon was a very > important part of testing. But the way it worked had nearly nothing to > do with the protocol compliance testing. Different vendors came together > with equipment and software, point clients to other people’s > servers and run a group of standardized tests. If our new client has > problem with the current version of let's say HP-UX - it does not matter > who is in compliance, it just means that WE do have a problem. > If such problem is found when both versions are not yet released – you > talk to other party, and also look how this specific test works with > other people implementations. > > The primary goal of such tests is inter-vendor compatibility and > "current industry practices" definitely dominate over puristic protocol > compliance issues. > > What kind of possible even/alliance are we trying to create? > Both have the right to exist. > > The first one, compliance tests, is kind of more straightforward, > one can just write a set of tests with limited interaction with > cache/service vendors. Still to be really useful such tests > should take into account current practices, the way HTTP is > practically implemented, not just seat in the clean > room with nothing but the set of RFC's. > > I agree with Alex that there is no need for all of us to come > together for such testing. Tests can be made available as > a software package - or alternately run remotely by configuring > the test lab and system under test to point to one another. The > latter form creates more controllable environment and may prevent > some problems Alex is talking about. > > The form of organization Duane is proposing is best suited exactly > for this type of testing. > > Connect-a-thone may be also a good thing to have. It is especially > useful for cache/layerX switch/router vendors - current environment > becomes extremely complicated. Too many different devices available, > and understanding the source of the problem when interacting with > specific device often requires a help of vendor engineers - not just > sales support. Service vendors may be interested in both testing > possible elements of infrastructure and preventing problems for > service customers. > > The connect-a-thone event may be opened to non-members for some > registration fee. > > My two cents. > > - Oskar > > >-----Original Message----- > >From: Alex Rousskov [mailto:rousskov@ircache.net] > >Sent: Monday, June 05, 2000 9:42 AM > >To: Mark C Nottingham > >Cc: wrec@cs.utk.edu > >Subject: Re: HTTP compliance > > > > > >On Sun, 4 Jun 2000, Mark C Nottingham wrote: > > > >> Others will have more intelligent things to say about the organisation of > >> funding, membership, etc., but it would be nice if vendors who aren't > >> directly participating weren't cut out (e.g., six-month code delay), as > >> they're generally the people who need the most help. > > > >We would be more than happy to cut nobody out. However, there are two > >problems that are hard to solve if you allow free timely access to the > >tool: > > > > - a not-for-marketing license would be nearly impossible > > to enforce; a company or a magazine are likely to violate > > the licensing terms (knowingly or not) and publish claims > > of [non]compliance. > > > > - there is not much incentive for vendors to pay for the > > development if they can get the tool anyway (just look > > at the number of Polygraph sponsors versus the number of > > caching vendors who use the tool) > > > >> How is the connect-a-thon organised in this respect? > > > >It will probably up to the participants to decide. IMO, connect-a-thon > >will not be very useful for these kinds of tests because the tool will > >be testing mostly compliance with standards and current practice rather > >than compatibility with similar software. I suspect that most of the > >tests can be done in isolation so connect-a-thon will not be required. > > > >> * What are the target devices for such tests? > >> Describing server and client as well as proxy/surrogate tests is > >useful, but > >> much more work, and it may turn out quite a bit harder (and more > >disruptive) > >> to pull the vendors on board. > >> > >> I'd recommend starting with proxy/surrogate devices, and eventually > >> expanding into clients and servers if there's enough interest. > > > >I would make it demand driven. If there is enough interest/support from > >the server/client community, the tool can include server/client tests. > > > >> * What kinds of tests? > >> The most obvious goal is to prove full 1.1 compliance, according > >to stated > >> RFC2119 requirements. I think most people realise that doing so > >is actually > >> a very difficult task, because of all of the possible > >permutations of HTTP > >> mechanisms, etc that present themselves. > > > >Full HTTP/1.1 compliance is a nice goal, but probably not very > >practical. Again, since the tool is designed for product developers, I > >would leave the scope for them to decide on. Initial goals should > >probably be more modest to get some visible progress sooner. > > > >> As I said in Lisbon, my interest is primarily in assuring that caches > >> operate in a predictable way to content providers; while we could test to > >> make sure that each message is well-formed, etc., IMHO that won't be > >> necessary, as it's already in the best interests of the vendor to do so. > >> > >> It may be more realistic to define a relatively small group of relevant > >> tests to start with, making it easier to get a first go at it > >out quickly, > >> to gauge response and hopefully have some positive effects ASAP. > > > >Agree. > > > >> Finally, I'd be very surprised if any of the commercial vendors > >who showed > >> interest didn't have a pre-existing compliance engine that they use > >> interally. If one could be convinced/arm-twisted that it would > >be in their > >> best interests to donate it (or a portion), we'd save a lot of effort. > > > >I am less optimistic after talking to several vendors :). However, we > >definitely should try to use the results of past developments if any. > > > >Thanks, > > > >Alex. > > -- Mark Nottingham, Senior Developer Akamai Technologies (San Mateo, CA) From owner-wrec@cs.utk.edu Mon Jun 5 13:53:42 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id NAA07554 for ; Mon, 5 Jun 2000 13:53:40 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id NAA13594; Mon, 5 Jun 2000 13:49:18 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Mon, 5 Jun 2000 13:49:18 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id NAA13576; Mon, 5 Jun 2000 13:49:18 -0400 (EDT) Received: from calcite.rhyolite.com (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id NAA13536; Mon, 5 Jun 2000 13:49:10 -0400 (EDT) Received: from calcite.rhyolite.com (38.159.140.3 -> calcite.rhyolite.com) by cs.utk.edu (smtpshim v1.0); Mon, 5 Jun 2000 13:49:11 -0400 Received: (from vjs@localhost) by calcite.rhyolite.com (8.9.3/calcite) id LAA26783 for wrec@cs.utk.edu env-from ; Mon, 5 Jun 2000 11:49:08 -0600 (MDT) Date: Mon, 5 Jun 2000 11:49:08 -0600 (MDT) From: Vernon Schryver Message-Id: <200006051749.LAA26783@calcite.rhyolite.com> To: wrec@cs.utk.edu Subject: Re: HTTP compliance List-Unsubscribe: > From: Mark C Nottingham > ... > from the specification. i.e., it would be good to test for optimal > operation, etc., but to declare that common practice supercedes an explicit > requirement in the specification is IMHO folly. Some people figure that going out of business is a greater folly. Others giggle about the OSI style of protocol development. In other words, the IETF slogans "rough consensus and running code" and "be conservative in what you send and generous in what you accept" are supposed to supersede all explicit requirements. .... Is anything happening with the redirection proxy hazards document or the NECP document? The silence about them is deafening. Vernon Schryver vjs@rhyolite.com From owner-wrec@cs.utk.edu Mon Jun 5 14:11:13 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id OAA07864 for ; Mon, 5 Jun 2000 14:11:12 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id OAA15670; Mon, 5 Jun 2000 14:05:27 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Mon, 5 Jun 2000 14:05:27 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id OAA15652; Mon, 5 Jun 2000 14:05:26 -0400 (EDT) Received: from mnot.sanmateo.akamai.com (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id OAA15639; Mon, 5 Jun 2000 14:05:24 -0400 (EDT) Received: from mnot.sanmateo.akamai.com (63.196.237.2 -> fw.west.akamai.com) by cs.utk.edu (smtpshim v1.0); Mon, 5 Jun 2000 14:05:24 -0400 Received: by mnot.sanmateo.akamai.com (Postfix, from userid 20351) id D994F5009; Mon, 5 Jun 2000 11:05:38 -0700 (PDT) Date: Mon, 5 Jun 2000 11:05:38 -0700 From: Mark C Nottingham To: Vernon Schryver Cc: wrec@cs.utk.edu Subject: Re: HTTP compliance Message-ID: <20000605110535.C9042@akamai.com> References: <200006051749.LAA26783@calcite.rhyolite.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2i In-Reply-To: <200006051749.LAA26783@calcite.rhyolite.com>; from vjs@calcite.rhyolite.com on Mon, Jun 05, 2000 at 11:49:08AM -0600 List-Unsubscribe: Cache vendors have taken a remarkably long time to start correctly implementing HTTP cacheability measures (Cache-Control, ageing, cacheability rules, etc). Current practice is a mush of different (mis-)interpretations of the specification. It would be of no benefit to gather consensus on these issues; they don't work because of misimplementation, rather than poor specification. In other words, allowing current practice to supercede standards presupposes that current practice has solved problems unforseen by the authors. As far as complete compliance testing goes, we'd need to get interest and participation from both server and client vendors before we can determine that we represent true current practice. On Mon, Jun 05, 2000 at 11:49:08AM -0600, Vernon Schryver wrote: > > From: Mark C Nottingham > > > ... > > from the specification. i.e., it would be good to test for optimal > > operation, etc., but to declare that common practice supercedes an explicit > > requirement in the specification is IMHO folly. > > Some people figure that going out of business is a greater folly. > Others giggle about the OSI style of protocol development. > > In other words, the IETF slogans "rough consensus and running code" > and "be conservative in what you send and generous in what you accept" > are supposed to supersede all explicit requirements. > > .... > > Is anything happening with the redirection proxy hazards document > or the NECP document? The silence about them is deafening. > > > Vernon Schryver vjs@rhyolite.com -- Mark Nottingham, Senior Developer Akamai Technologies (San Mateo, CA) From owner-wrec@cs.utk.edu Mon Jun 5 15:54:26 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id PAA09474 for ; Mon, 5 Jun 2000 15:54:26 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id PAA24988; Mon, 5 Jun 2000 15:49:51 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Mon, 5 Jun 2000 15:49:51 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id PAA24968; Mon, 5 Jun 2000 15:49:50 -0400 (EDT) Received: from mail-relay1.mirrorimage.net (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id PAA24947; Mon, 5 Jun 2000 15:49:49 -0400 (EDT) Received: from mail-relay1.mirrorimage.net (209.58.140.11 -> mail-relay1.mirrorimage.net) by cs.utk.edu (smtpshim v1.0); Mon, 5 Jun 2000 15:49:49 -0400 Received: from oskarpc (mail-relay1.mirrorimage.net [209.58.140.11]) by mail-relay1.mirrorimage.net (8.9.3/8.9.3) with SMTP id OAA07063; Mon, 5 Jun 2000 14:49:39 -0500 From: "Oskar Batuner" To: "Mark C Nottingham" Cc: Subject: RE: HTTP compliance Date: Mon, 5 Jun 2000 15:48:32 -0400 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2314.1300 In-Reply-To: <20000605110535.C9042@akamai.com> List-Unsubscribe: Content-Transfer-Encoding: 7bit Mark, here we again have to set the right goal. On my mind such goal should be not the ultimate judgment if particular implementation is right or wrong, but to provide the information how this implementation will interoperate with the rest of the world - now and in the foreseeable future. Especially if we go with the proposed format when results are not published and used for marketing. There should be a series of tests and multiple levels of compatibility. Compliance with the letter of 2616 is also of some interest, this helps to predict interoperation with the future implementations. And you are right when you talk about looking for agreement on the common interpretation of the spec - this may be most probable direction of future developments one should take into account. Kind of problem is that such discussions will inevitably push us into the HTTP development area. Is this good or bad? I'm not sure. - Oskar >-----Original Message----- >From: Mark C Nottingham [mailto:mnot@akamai.com] >Sent: Monday, June 05, 2000 2:06 PM >To: Vernon Schryver >Cc: wrec@cs.utk.edu >Subject: Re: HTTP compliance > > > >Cache vendors have taken a remarkably long time to start correctly >implementing HTTP cacheability measures (Cache-Control, ageing, >cacheability >rules, etc). Current practice is a mush of different (mis-)interpretations >of the specification. It would be of no benefit to gather >consensus on these >issues; they don't work because of misimplementation, rather than poor >specification. > >In other words, allowing current practice to supercede standards >presupposes >that current practice has solved problems unforseen by the authors. > >As far as complete compliance testing goes, we'd need to get interest and >participation from both server and client vendors before we can determine >that we represent true current practice. > > > >On Mon, Jun 05, 2000 at 11:49:08AM -0600, Vernon Schryver wrote: >> > From: Mark C Nottingham >> >> > ... >> > from the specification. i.e., it would be good to test for optimal >> > operation, etc., but to declare that common practice >supercedes an explicit >> > requirement in the specification is IMHO folly. >> >> Some people figure that going out of business is a greater folly. >> Others giggle about the OSI style of protocol development. >> >> In other words, the IETF slogans "rough consensus and running code" >> and "be conservative in what you send and generous in what you accept" >> are supposed to supersede all explicit requirements. >> >> .... >> >> Is anything happening with the redirection proxy hazards document >> or the NECP document? The silence about them is deafening. >> >> >> Vernon Schryver vjs@rhyolite.com > >-- >Mark Nottingham, Senior Developer >Akamai Technologies (San Mateo, CA) > From owner-wrec@cs.utk.edu Mon Jun 5 17:19:46 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id RAA10629 for ; Mon, 5 Jun 2000 17:19:45 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id RAA03583; Mon, 5 Jun 2000 17:15:03 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Mon, 5 Jun 2000 17:15:02 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id RAA03558; Mon, 5 Jun 2000 17:15:02 -0400 (EDT) Received: from mnot.sanmateo.akamai.com (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id RAA03545; Mon, 5 Jun 2000 17:15:00 -0400 (EDT) Received: from mnot.sanmateo.akamai.com (63.196.237.2 -> fw.west.akamai.com) by cs.utk.edu (smtpshim v1.0); Mon, 5 Jun 2000 17:15:00 -0400 Received: by mnot.sanmateo.akamai.com (Postfix, from userid 20351) id 3A7415009; Mon, 5 Jun 2000 14:15:11 -0700 (PDT) Date: Mon, 5 Jun 2000 14:15:11 -0700 From: Mark C Nottingham To: Oskar Batuner Cc: wrec@cs.utk.edu Subject: Re: HTTP compliance Message-ID: <20000605141508.A9991@akamai.com> References: <20000605110535.C9042@akamai.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2i In-Reply-To: ; from oskar@mirror-image.com on Mon, Jun 05, 2000 at 03:48:32PM -0400 List-Unsubscribe: On Mon, Jun 05, 2000 at 03:48:32PM -0400, Oskar Batuner wrote: > Mark, here we again have to set the right goal. > On my mind such goal should be not the ultimate judgment > if particular implementation is right or wrong, but to provide the > information how this implementation will interoperate with the rest > of the world - now and in the foreseeable future. Especially > if we go with the proposed format when results are not > published and used for marketing. Well said. Interesting points of contact are: * other intermediates (proxies, caches) * client software (user-agents) * server software (origin servers) * content providers' expectations * end user expectations (?) It's obviously the last two that I'm focused on, but the others are just as worthy. However, they may be a somewhat more ambitious undertaking. > There should be a series of tests and multiple levels of > compatibility. Compliance with the letter of 2616 is also > of some interest, this helps to predict interoperation with the > future implementations. And you are right when you talk about > looking for agreement on the common interpretation of the > spec - this may be most probable direction of future developments > one should take into account. Kind of problem is that such discussions > will inevitably push us into the HTTP development area. Is this > good or bad? I'm not sure. One way to find out! Seriously, there's a lot of ground to be covered there. As Jeff mentioned, if there are ambiguities or conflicts in the spec, now is the appropriate time to raise them with the wg. -- Mark Nottingham, Senior Developer Akamai Technologies (San Mateo, CA) From owner-wrec@cs.utk.edu Mon Jun 5 18:50:56 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id SAA12242 for ; Mon, 5 Jun 2000 18:50:55 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id SAA09934; Mon, 5 Jun 2000 18:46:08 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Mon, 5 Jun 2000 18:46:08 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id SAA09915; Mon, 5 Jun 2000 18:46:07 -0400 (EDT) Received: from boreas.isi.edu (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id SAA09901; Mon, 5 Jun 2000 18:46:05 -0400 (EDT) Received: from boreas.isi.edu (128.9.160.161 -> boreas.isi.edu) by cs.utk.edu (smtpshim v1.0); Mon, 5 Jun 2000 18:46:05 -0400 Received: from isi.edu (sci.isi.edu [128.9.160.93]) by boreas.isi.edu (8.9.3/8.9.3) with ESMTP id PAA11697; Mon, 5 Jun 2000 15:46:01 -0700 (PDT) Message-ID: <393C2D9A.B60D3B28@isi.edu> Date: Mon, 05 Jun 2000 15:45:46 -0700 From: Joe Touch X-Mailer: Mozilla 4.73 [en] (Win98; U) X-Accept-Language: en,pdf MIME-Version: 1.0 To: Vernon Schryver CC: wrec@cs.utk.edu Subject: Re: HTTP compliance References: <200006051749.LAA26783@calcite.rhyolite.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit List-Unsubscribe: Content-Transfer-Encoding: 7bit Vernon Schryver wrote: > > Is anything happening with the redirection proxy hazards document > or the NECP document? The silence about them is deafening. My understanding is that there is interest in incorporating the proxy hazards issues into a current document, namely "known problems". Some of the issues are already raised there, and the sum of issues I am aware of is available on the website summary I posted earlier. I don't know how to best integrate it with that document, though. I've given the framework, I'm not sure free-running text would be more useful at this point. Joe From owner-wrec@cs.utk.edu Mon Jun 5 19:11:28 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id TAA12498 for ; Mon, 5 Jun 2000 19:11:28 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id TAA11720; Mon, 5 Jun 2000 19:07:01 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Mon, 5 Jun 2000 19:07:00 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id TAA11702; Mon, 5 Jun 2000 19:07:00 -0400 (EDT) Received: from catarina.usc.edu (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id TAA11689; Mon, 5 Jun 2000 19:06:58 -0400 (EDT) Received: from catarina.usc.edu (128.125.51.47 -> catarina.usc.edu) by cs.utk.edu (smtpshim v1.0); Mon, 5 Jun 2000 19:06:58 -0400 Received: from rumi.usc.edu (rumi.usc.edu [128.125.51.41]) by catarina.usc.edu (8.9.3/8.9.3) with ESMTP id QAA13010; Mon, 5 Jun 2000 16:06:57 -0700 (PDT) Received: from usc.edu (localhost [127.0.0.1]) by rumi.usc.edu (8.9.3/8.9.3) with ESMTP id QAA32870; Mon, 5 Jun 2000 16:06:57 -0700 (PDT) Message-Id: <200006052306.QAA32870@rumi.usc.edu> To: Vernon Schryver cc: wrec@cs.utk.edu Subject: Re: HTTP compliance In-Reply-To: Message from Vernon Schryver of "Mon, 05 Jun 2000 11:49:08 MDT." <200006051749.LAA26783@calcite.rhyolite.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <32867.960246417.1@usc.edu> Date: Mon, 05 Jun 2000 16:06:57 -0700 From: Jeremy Elson List-Unsubscribe: Vernon Schryver writes: >Is anything happening with the redirection proxy hazards document >or the NECP document? The silence about them is deafening. We're working on a new draft of NECP that focuses exclusively on its use in server-farm load-balancing. We do not mention its potential [mis]use in a redirection/interception proxy (or whatever the current term is for those things). Instead, we assume that the topic will be discussed fully, and in context, in either the redirection proxy hazards or "known problems" document. Currently, the actual protocol definition is unchanged with respect to previous versions of the draft. (We did replace all mentions of the word "standard" with "protocol", though, in recognition of the fact that this is to be an Informational RFC and is not currently on the Standards track). -Jeremy From owner-wrec@cs.utk.edu Thu Jun 8 12:40:33 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id MAA11499 for ; Thu, 8 Jun 2000 12:40:33 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id MAA15850; Thu, 8 Jun 2000 12:40:24 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Thu, 8 Jun 2000 12:40:16 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id MAA15818; Thu, 8 Jun 2000 12:40:15 -0400 (EDT) Received: from mta5.rcsntx.swbell.net (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id MAA15762; Thu, 8 Jun 2000 12:40:13 -0400 (EDT) From: Received: from mta5.rcsntx.swbell.net (151.164.30.29 -> mta5.rcsntx.swbell.net) by cs.utk.edu (smtpshim v1.0); Thu, 8 Jun 2000 12:40:13 -0400 Received: from zainprov ([207.193.24.81]) by mta5.rcsntx.swbell.net (Sun Internet Mail Server sims.3.5.2000.01.05.12.18.p9) with SMTP id <0FVU00BB1FA6SN@mta5.rcsntx.swbell.net> for wrec@cs.utk.edu; Thu, 8 Jun 2000 11:05:19 -0500 (CDT) Date: Thu, 08 Jun 2000 11:05:19 -0500 (CDT) Date-warning: Date header was inserted by mta5.rcsntx.swbell.net Subject: Shocking LOSE 10-100lbs. 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Thank you, Sherry Wilson From owner-wrec@cs.utk.edu Mon Jun 19 16:51:13 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id QAA23269 for ; Mon, 19 Jun 2000 16:51:13 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id QAA15026; Mon, 19 Jun 2000 16:50:41 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Mon, 19 Jun 2000 16:50:18 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id QAA14982; Mon, 19 Jun 2000 16:50:17 -0400 (EDT) Received: from mail.cs.utexas.edu (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id QAA14969; Mon, 19 Jun 2000 16:50:15 -0400 (EDT) Received: from mail.cs.utexas.edu (128.83.139.10 -> mail.cs.utexas.edu) by cs.utk.edu (smtpshim v1.0); Mon, 19 Jun 2000 16:50:15 -0400 Received: from cs.utexas.edu (vaio.csres.utexas.edu [128.83.141.4]) by mail.cs.utexas.edu (8.9.3/8.9.3) with ESMTP id PAA24169; Mon, 19 Jun 2000 15:50:13 -0500 (CDT) Message-ID: <394E87E2.2793D35F@cs.utexas.edu> Date: Mon, 19 Jun 2000 15:51:47 -0500 From: Mike Dahlin X-Mailer: Mozilla 4.72 [en]C-CCK-MCD {Sony} (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: wrec@cs.utk.edu CC: Dan Li , Pei Cao , yin@cs.utexas.edu, lorenzo@cs.utexas.edu, dahlin@cs.utexas.edu, lin@cs.utexas.edu Subject: Re: the slides on web cache invalidation protocol References: <4.2.0.58.20000602181907.00da3b70@omega> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit List-Unsubscribe: Content-Transfer-Encoding: 7bit Dan Li wrote: > Hi, here is the slides on WCIP presented in the recent caching workshop. > > It's mostly a bag of ideas, a better write-up is on the way. Please > comment, if you are interested in working on it. > > Thanks! > Dan > > ------------------------------------------------------------------------ > Name: invalidation.ppt > invalidation.ppt Type: Microsoft PowerPoint Show (application/vnd.ms-powerpoint) > Encoding: base64 Overall, I agree with the motivation and high-level approach. Providing invalidation-based consistency as an option would make it easier to construct services that behave correctly. It could also improve performance/scalability in a number of of situations. There is one significant point where I think a small change in what is described would significantly improve the protocol independent of most other design decisions. In addition, I have a number of more detailed comments, questions, and other issues to consider. Below, I first discuss what I see as the main issue in detail. Then I discuss the lower level comments using the outline of Li and Cao's powerpoint presentation (sent to this mailing list a few weeks ago; see ftp://cs.utk.edu/pub/wrec/mail-archive.2000-06) as a framework. Main comment: I mark this as the main comment not because it is particularly hard to fix, but because not fixing it could, I believe, hamstring the protocol by making it more complex and less expressive than it could be with a slightly different approach. The definition of "fresh bound of an object" described in the powerpoint is awkward in that it gives the "heartbeat interval" semantic meaning. In particular, the design bounds the worst case staleness of an object to (fresh_bound + heartbeat_interval). According to the slides, objects become stale as follows: "if the cache receives no heartbeat from the invalidation server in the last heartbeat interval, invalidate all objects whose 'fresh bound' timer has expired." The slides go on to give the following example: if an object fresh bound is 5 minutes and the heartbeat interval of the channel is 1 minute then the worst case staleness of the object is 6 minutes. I believe that the lease (or "fresh bound") on an object should define the semantic guarantee and that the heartbeat interval should have no semantic meaning. For example, one could use the following definition: "if an object's freshness bound is F and the time since the cache's last communication with the server (server-initiated heartbeat or reply to a cache's request) is CS, the cached object is valid iff (CS <= F); otherwise the cached object must be revalidated before use." There are several advantages to this approach: 1) Performance -- separating these concerns allows the heartbeat interval to be tuned to match link characteristics and performance requirements. For example, as loss rate falls, lower heartbeat rates (down to 1 hb per lease interval rather than multiple hb per lease interval) may be appropriate. Or, busy servers may want to reduce their heartbeat rate (trading increased risk of "stranding" clients for reduced overhead). Or, some servers may not want to send periodic heartbeats at all (piggy-backing "I'm alive" messages on other messages to clients actively using the service and dropping idle clients.) 2) Clarity -- Telling web masters that they should set their "freshness_bound = 5 minutes" to get, say, a 6 minute maximum stalenes is an API that will confuse people. 3) Flexibility -- Separating the heartbeat interval from the freshness guarantee makes it easier to support a broad range of consistency guarantees. Conversely, if the heartbeat interval must be smaller than the staleness guarantee, small staleness guarantees in the seconds to tens of seconds range become very expensive because they force the system to use even shorter heartbeats. Furthermore, semantics that separate heartbeats from maximum staleness can be extended in a straightforward way to allow services to provide strong consistency guarantees under which clients never see stale data; that is not an option if heartbeats have this semantic baggage. 4) Flexibility -- Separating the heartbeat interval from the freshness guarantee makes it easier to support different implementations of heartbeats from unreliable multicast to unreliable unicast to reliable unicast to client polling. // Aside: // Two pieces of background that I am assuming in the above discussion. // 1) Protocols will piggyback "I'm alive"/volume lease // renewal/heartbeat on all client->server messages so that the system // can function correctly without heartbeats // 2) Protocols that use heartbeats and that run on unreliable transport // may want to send multiple heartbeats per lease interval to avoid the // need to resynchronize state when one or two messages are lost. Detailed comments on slides --------------------------- Slides 1-3 ---------- Not much to argue with here... Slide 4 ------- 1. The slide implies that active server-push heartbeats are required by the protocol. As indicated above, I think we may want to consider making server-push heartbeats optional (e.g., the system renews the leases of active clients by piggy-backing renewals on other traffic and/or allow clients to send explicit "lease renewal" messages rather than requiring server push). If the definitions are cleaned up as discussed above, this option comes more or less for free. 2. "Delivery: unicast, application-layer multicast, or IP multicast." I agree with the goal of making the consistency protocol independent of the transport protocol to the extent possible. One other option to put on the wish list: hierarchy of consistency servers (perhaps this was already assumed.) Another one to put on the wish list: unreliable unicast (the later slides imply that unicast = persistent connection/TCP). (I'm not saying that we want to support all of these protocols, but it would be nice to have a systematic way to decide which ones to support.) One other point to keep in mind as we hash out the details: there may be some subtle effects of different transports on the semantics you end up with. For example: suppose you use unreliable IP multicast for both invalidations and heartbeats and an invalidation message is lost but a client receives a subsequent heartbeat. Unless the protocol goes to some trouble, there is effectively no upper bound on the maximum staleness of a cached object (which may be much weaker semantics than some users might expect or desire from the protocol.) When I think about these protocols, this dilemma (desire for protocol independence v. the need for certain guarantees from the transport layer in order to provide certain desirable semantics guarantees) is one of the things I struggle with. I don't have a great answer. Here are some options to get the discussion started: o Varying semantics Define a simple protocol that is independent of transport semantics, allow different servers to specify different transports to be used, and allow the semantics delivered to the application vary depending on the transport chosen by the server. To make this acceptable, we should precisely charactactize the semantics provided by different transport choices. The advantage of the approach is that it may offer the chance to provide a simple protocol that has good performance and semantics in a wide range of implementations and it lets servers pay for just the semantics they need. A disadvantage is that it is not satisfying to have the tranport layer choice affect semantics. o Limit network choices or limit semantics Define a simple protocol that makes specific assumptions about the network transport and that provides specific semantics. If a transport doesn't meet the assumptions, it cannot be used (or requires a layer above it to fix the semantic limitations). If a transport layer provides stronger guarantees than assumed by the protocol, the system may pay unneeded overhead as these guarantees are re-implemented at the consistency protocol level. The disadvantage of this approach is that we face a dilemma: if we specify stronger semantics (e.g., specify a protocol that guarantees some maximum staleness) we eliminate certain transports (or increase the complexity of using certain transports); conversely, if we specify weaker semantics, we leave some applications unsatisfied. The advantage is that we may be able to hash out a specific solution to the compromise that keeps everyone happy. The obvious example of a successful application of this strategy is HTTP -- HTTP uses a somewhat heavyweight network protocol that keeps the HTTP protocol simple but that may give up the opportunities for optimizing performance. We should keep this option in the back of our minds before we commit to supporting a wide range of transports. o Provide protocol "hooks" for varying semantics Define a simple protocol, but add some optional features to provide stronger semantics on weaker networks. The disadvantage of this approach is protocol complexity. 3. "POST to update the object (Delta encoding)" It is worth noting that this really raises the ante w.r.t security. I have not tried to think through these details. Slide 5 ------- 1. Question: I assume the client-->server message "Invalidation: ..." is piggy-backed on the GET request? 2. One option we may want to consider: clients may want to specify a maximum time that the server is entitled to send invalidations (or updates) to the client. I'm not sure this is vital, but it might be important in some circumstances. The point is that pushing things to a client does chew up client resources (especially if the server is pushing updates, not just invalidates) so one might want to give clients the option of limiting this usage. (My initial reaction would be to omit this feature, but it may be worth discussing.) 3. Given the (somewhat peculiar IMHO) definition of heartbeats proposed in the powerpoint, something may be missing (or it may be a deliberate omission for the powerpoint) -- if object expirations are a function of the heartbeat interval, the server needs to tell the client what heartbeat interval it is using in the server-->client "Invalidation:" message. If the definition is fixed, this is not an issue. Slide 6 ------- 1. "Join the invalidation channel if it caches quite a few objects of the channel" Hm. I don't know off hand how to set this magic number. Is a "channel" equivalent to a server (an IP address?); is it intended that more general 'volumes' be supported? (It looks like this protocol supports those by allowing a server to give out different "Invalidation:" IP addresses for different volumes, which seems like a nice feature.) 2. "In unicast, establish a persistent connection with the invalidation server" Note that depending on the decisions made about the network/protocol semantics above, the persistent connection may end up having semantic meaning (which could be awkward.) E.g., one might expect that if you are using a persistent connection that you would get things like in-order, reliable delivery. But if the connection gets torn down and another one started, you might lose some of those properties. If you are relying on those properties, you would need to have the "persistent connection re-established" event passed up to the consistency protocol, which could be problematic. 3. The structure of the message that the client sends to the server to connect (for tcp-unicast) probably needs to be defined 4. It might also be worth considering supporting unreliable unicast (e.g., UDP) (so unicast = persistent connection might not be quite right). Slide 7 ------- 1. "Send heartbeats if no message is sent in the last heartbeat interval" seems a bit awkward. 2. Should the system have the option of using unicast for invalidations and multicast for heartbeats? (What new semantic issues arise?) Slide 8 ------ (main comments: see discussion above) 1. Incidently, I believe the freshness bound stated (fresh_bound + heartbeat_interval) is not quite right (even if the original definition for fresh bound/heartbeat is used). I believe that the proposed protocol actually provides a freshness bound of: (fresh_bound + heartbeat_interval + max_network_delay). Note that the alternate definition also has this property (its guarantee is fresh_bound + max_network_delay). In theory this could significantly weaken semantic guarantees but in practice this is probably something that could be lived with. At the same time, a small refinement of the definition can get rid of this glitch (at least for lease renewals "piggy-backed" on replies to client requests): when a client sends a request at time T1 and receives a reply at time T2, it knows that the server was alive at some instant between time T1 and T2. Rather than expire objects at time T2 + F, the client can expire objects at time T1 + F. I don't think this is a huge issue, but I think the protocol is a bit cleaner this way with essentially no additional cost. It also improves flexibility by supporting correct behavior with very short leases. Unfortunately, this trick doesn't help in the case of servers "pushing" heartbeats. Ideas anyone? 2. It seems like there is an implicit assumption that heartbeats are sent via an unreliable channel so that the heartbeat interval is much shorter than the fresh bound). (Then if one or two heartbeat are lost, the client-server state stays synchronized.) If heartbeats are sent on a reliable channel, you just want to send them once, just before the lease expires. 3. If leases expire (e.g., no heartbeats for a while), the simple way to re-synchronize the state is to discard objects, and that is what is indicated here. That is probably the prudent way to go. Still, there may be some benefits to considering other reconnection protocols that might have some nice performance benefits. Slide 9 ------- see comments above Slide 10 -------- 1. Should a transparent caches be able to reply to get-if-modified/ lease-renewal requests? The advantage of allowing them to do so is improved performance. Given better consistency guarantees to control the semantics of caches, this (conceptually) should be possible. The challenge in doing so is probably proving sensible semantics across failures. 2. hierarchy In addition to working through the details of transparent hierarchical caches, we should work through the details of explicit hierarchical caches (in particular the 2-level client/proxy case). Again, I suspect the main issue is failure semantics. Slide 11 -------- 1. In addition to supporting scalability via application-level multicast, the system should support scalability via hierarchy of caches/invalidation servers. In addition to providing a similar type of scalability as application-level multicast, supporting hierarchies (a) provides a simple way to build scalable invalidation servers on a cluster and (b) can improve lease renewal/reconnection latency by letting consistency servers near clients locally handle client requests. Slide 12 -------- 1. One other option to add is to specify an SSL or IPSec channel in the "Invalidation:" header (where there would normally be just an IP address.) This approach might let you factor the security out of this protocol and leave it to the transport layer (this is in the spirit of the "vary semantics by transport layer" approach above -- depending on the transport layer the server uses, the service will get different semantic guarantees. 2. Let me see if I understand how the ETAG is working to prevent replays. If a client is caching object O with Etag E, the server sends an invalidate message of roughly the form: Invalidate O E {MD5{Invalidate 0 E}}K_server_private So the client knows this is a "fresh" request. If the signature doesn't match or E does not match the client's entity tage for O, the client ignores the message; similar procedure for update, right. This seems reasonable, although it is a bit awkward if lossy channels are to be supported -- if a client misses an invalidation message, the old version of that object becomes "stuck" in the cache forever. It would be nice if these were self-healing in some way (e.g., one could specify a monotonically increasing version number rather than an opaque etag, but I guess that has its own problems.) Other issues ------------ (some of which I have candidate answers for and some of which I do not..) o recovery (after server/ crash) e.g., suppose server crashes and recovers before leases expire One possible solution is to use server "epoch numbers" to allow clients to detect when lease renewals/heartbeats do not apply to object leases they are holding. An alternate implementation of this concept would be for servers not to re-use the same heartbeat channel when they recover (at least until max_lease has passed). o How to set "legacy" cache control headers in different scenarios (esp. in a hierarchy where some levels speak "invalidation" and some don't) For example, what should happen when a server and proxy speak "invalidation" but want to support clients talking to the proxy that don't. o Should the system support atomic invalidation of multiple objects? (I can think of a number of advantages of doing so, and it seems pretty straightforward to do.) Well, hopefully this is enough to get discussion rolling... I look forward to continuing this discussion and getting a protocol out there. -mike From owner-wrec@cs.utk.edu Mon Jun 19 17:38:59 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id RAA24070 for ; Mon, 19 Jun 2000 17:38:58 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id RAA19377; Mon, 19 Jun 2000 17:38:58 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Mon, 19 Jun 2000 17:38:57 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id RAA19347; Mon, 19 Jun 2000 17:38:55 -0400 (EDT) Received: from omega.cisco.com (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id RAA19330; Mon, 19 Jun 2000 17:38:53 -0400 (EDT) Received: from omega.cisco.com (171.69.63.141 -> omega.cisco.com) by cs.utk.edu (smtpshim v1.0); Mon, 19 Jun 2000 17:38:53 -0400 Received: from dli2-nt (dhcp-10-34-17-66.cisco.com [10.34.17.66]) by omega.cisco.com (8.8.8-Cisco List Logging/8.8.8) with ESMTP id OAA06382; Mon, 19 Jun 2000 14:38:18 -0700 (PDT) Message-Id: <4.2.0.58.20000619143755.00d27b60@omega> X-Sender: lidan@omega X-Mailer: QUALCOMM Windows Eudora Pro Version 4.2.0.58 Date: Mon, 19 Jun 2000 14:39:11 -0700 To: Mike Dahlin , wrec@cs.utk.edu From: Dan Li Subject: Re: the slides on web cache invalidation protocol Cc: Pei Cao , yin@cs.utexas.edu, lorenzo@cs.utexas.edu, dahlin@cs.utexas.edu, lin@cs.utexas.edu In-Reply-To: <394E87E2.2793D35F@cs.utexas.edu> References: <4.2.0.58.20000602181907.00da3b70@omega> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed List-Unsubscribe: At 03:51 PM 6/19/00 -0500, Mike Dahlin wrote: >The definition of "fresh bound of an object" described in the >powerpoint is awkward in that it gives the "heartbeat interval" >semantic meaning. In particular, the design bounds the worst case >staleness of an object to (fresh_bound + >heartbeat_interval). I fully agree. In fact the draft we are working on got rid of it. Thanks for pointing it out! Dan From owner-wrec@cs.utk.edu Tue Jun 20 08:58:10 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id IAA20316 for ; Tue, 20 Jun 2000 08:58:10 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id IAA02738; Tue, 20 Jun 2000 08:58:05 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Tue, 20 Jun 2000 08:58:03 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id IAA02716; Tue, 20 Jun 2000 08:58:03 -0400 (EDT) Received: from ada.cs.ucy.ac.cy (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id IAA02670; Tue, 20 Jun 2000 08:57:29 -0400 (EDT) Received: from ada.cs.ucy.ac.cy (194.42.10.200 -> ada.cs.ucy.ac.cy) by cs.utk.edu (smtpshim v1.0); Tue, 20 Jun 2000 08:57:35 -0400 Received: from cs144 (cs144.cs.ucy.ac.cy [194.42.7.56]) by ada.cs.ucy.ac.cy (8.8.8/8.8.8) with SMTP id QAA34954; Tue, 20 Jun 2000 16:04:45 +0300 Message-ID: <0d0501bfdab8$bf382a70$38072ac2@cs.ucy.ac.cy> From: "Andreas Pitsillides" To: , , "\"terena list\"" , , , , , , , , , , , , "\"GU-NET\"" , "\"Globecom\"" , , , , , , , "\"Conferencesa\"" , , "\"comm-theory\"" , "\"cnom\"" , "\"alg\"" , Cc: "Andreas Pitsillides" Subject: IEEE Infocom 2001 ---> 13 DAYS to GO ---- HAVE YOU SUBMITTED YOUR PAPER ? 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Cruz, UCSD Giovanni Pacifici, IBM Research From owner-wrec@cs.utk.edu Thu Jun 22 13:24:24 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id NAA10947 for ; Thu, 22 Jun 2000 13:24:23 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id NAA03033; Thu, 22 Jun 2000 13:24:09 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Thu, 22 Jun 2000 13:23:59 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id NAA02976; Thu, 22 Jun 2000 13:23:58 -0400 (EDT) Received: from finch-post-12.mail.demon.net (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id NAA02963; Thu, 22 Jun 2000 13:23:57 -0400 (EDT) Received: from finch-post-12.mail.demon.net (194.217.242.41 -> finch-post-12.mail.demon.net) by cs.utk.edu (smtpshim v1.0); Thu, 22 Jun 2000 13:23:57 -0400 Received: from alethea.demon.co.uk ([194.222.10.198] helo=ian-ntlap.mirror-image.com) by finch-post-12.mail.demon.net with esmtp (Exim 2.12 #1) id 135Ahn-000Flf-0C for wrec@cs.utk.edu; Thu, 22 Jun 2000 17:23:55 +0000 Message-Id: <4.3.2.7.2.20000622131418.00b1c2c0@127.0.0.1> X-Sender: ian/pop.mirrorimage.net@127.0.0.1 X-Mailer: QUALCOMM Windows Eudora Version 4.3.2 Date: Thu, 22 Jun 2000 13:23:54 -0400 To: wrec@cs.utk.edu From: Ian Cooper Subject: Taxonomy - section 4, replica selection Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed List-Unsubscribe: It looks like section 4 of the taxonomy would benefit from the inclusion of a sub-section on URNs being used in the replica selection process. (I don't know how this got missed - it's certainly something that's mentioned in the security section.) I'd be grateful if someone would submit a sample section for inclusion in the draft. From owner-wrec@cs.utk.edu Thu Jun 22 19:40:22 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id TAA17460 for ; Thu, 22 Jun 2000 19:40:22 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id TAA05419; Thu, 22 Jun 2000 19:40:17 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Thu, 22 Jun 2000 19:40:15 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id TAA05397; Thu, 22 Jun 2000 19:40:14 -0400 (EDT) Received: from mnot.sanmateo.akamai.com (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id TAA05383; Thu, 22 Jun 2000 19:40:12 -0400 (EDT) Received: from mnot.sanmateo.akamai.com (63.196.237.2) by cs.utk.edu (smtpshim v1.0); Thu, 22 Jun 2000 19:40:13 -0400 Received: by mnot.sanmateo.akamai.com (Postfix, from userid 20351) id DB5FD5047; Thu, 22 Jun 2000 16:40:17 -0700 (PDT) Date: Thu, 22 Jun 2000 16:40:17 -0700 From: Mark C Nottingham To: wrec@cs.utk.edu Subject: HTTP Compliance tests Message-ID: <20000622164014.B18537@akamai.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2i List-Unsubscribe: Here are some areas that seem to be common pitfalls. Comments/additions welcome; this is just a starting point. * obeying server-side freshness controls (all Cache-Control, Expires) * proper generation of Age headers * handling of Date headers * caching negotiated responses (Vary header) * parsing combined ("folded") HTTP headers * byte-range handling * erroneous forwarding of hop-by-hop headers * invalidation of cache entries (upon POST, etc) While there are many other compliance issues, I've selected these because they effect cachability, an areas that IMHO vendors have a conflict of interest about, to some degree. It's very much in the interest of vendors to assure that a device operates correctly in the eyes of the ISP (thier customer), but that may not be the case for the HTTP mechanisms which represent the origin server's wishes. Two issues present themselves: * HTTP Version More caches are presenting themselves as HTTP/1.1 devices, which makes it easy to know what criteria to apply to them, but several still advertise as 1.0 devices. However, they do use 1.1 mechanisms. This is further confused by the differences between RFC2068 and RFC2616. * Nature of tests I think this was discussed before, but there are different kinds of behaviours that we can look for; some that are necessary for compliance (required), and some that are a Good Idea (optimal). While there will undoubtedly be different perceptions of what optimal is, I think we can and should test for some 'safe' optimal behaviours, especially in terms of taking advantage of the cacheability of an object. -- Mark Nottingham, Senior Developer Akamai Technologies (San Mateo, CA) From owner-wrec@cs.utk.edu Thu Jun 22 21:52:37 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id VAA19314 for ; Thu, 22 Jun 2000 21:52:37 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id VAA14806; Thu, 22 Jun 2000 21:51:59 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Thu, 22 Jun 2000 21:51:58 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id VAA14784; Thu, 22 Jun 2000 21:51:57 -0400 (EDT) Received: from zamboni.cmcl.cs.cmu.edu (marvin@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id VAA14770; Thu, 22 Jun 2000 21:51:55 -0400 (EDT) Received: from zamboni.cmcl.cs.cmu.edu (128.2.220.240 -> ZAMBONI.CMCL.CS.CMU.EDU) by cs.utk.edu (smtpshim v1.0); Thu, 22 Jun 2000 21:51:55 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <14674.49832.924099.767014@zamboni.cmcl.cs.cmu.edu> Date: Thu, 22 Jun 2000 21:51:36 -0400 (EDT) To: Mark C Nottingham Cc: wrec@cs.utk.edu Subject: Re: HTTP Compliance tests In-Reply-To: <20000622164014.B18537@akamai.com> References: <20000622164014.B18537@akamai.com> X-Mailer: VM 6.75 under 20.4 "Emerald" XEmacs Lucid From: Andrew Myers List-Unsubscribe: Content-Transfer-Encoding: 7bit I'd like to suggest one more area: content negotiation. As a random example of what can go wrong: Some caches will serve up gzip encoded content to a client that hasn't advertised that it can accept such content. There are a number of uglier issues with content negotiation (hello byte ranges!), but I'd just like to see some tests for the really basic stuff. Andy Mark C Nottingham writes: > > Here are some areas that seem to be common pitfalls. Comments/additions > welcome; this is just a starting point. [...] From owner-wrec@cs.utk.edu Fri Jun 23 17:06:01 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id RAA19244 for ; Fri, 23 Jun 2000 17:06:01 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id RAA01449; Fri, 23 Jun 2000 17:05:30 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Fri, 23 Jun 2000 17:05:03 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id RAA01416; Fri, 23 Jun 2000 17:05:02 -0400 (EDT) Received: from mnot.sanmateo.akamai.com (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id RAA01403; Fri, 23 Jun 2000 17:05:00 -0400 (EDT) Received: from mnot.sanmateo.akamai.com (63.196.237.2) by cs.utk.edu (smtpshim v1.0); Fri, 23 Jun 2000 17:05:01 -0400 Received: by mnot.sanmateo.akamai.com (Postfix, from userid 20351) id DCD17502A; Fri, 23 Jun 2000 14:05:05 -0700 (PDT) Date: Fri, 23 Jun 2000 14:05:05 -0700 From: Mark Nottingham To: Andrew Myers Cc: wrec@cs.utk.edu Subject: Re: HTTP Compliance tests Message-ID: <20000623140502.H21037@akamai.com> References: <20000622164014.B18537@akamai.com> <14674.49832.924099.767014@zamboni.cmcl.cs.cmu.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2i In-Reply-To: <14674.49832.924099.767014@zamboni.cmcl.cs.cmu.edu>; from acm+@cs.cmu.edu on Thu, Jun 22, 2000 at 09:51:36PM -0400 List-Unsubscribe: I think this would be taken care of by the Vary testing. Also, it would be nice (maybe I'm dreaming here) to test a history of products, not just the most recent a vendor has to offer. From the logs I've looked at, there are a *lot* of old proxies out there. On Thu, Jun 22, 2000 at 09:51:36PM -0400, Andrew Myers wrote: > I'd like to suggest one more area: content negotiation. As a random > example of what can go wrong: Some caches will serve up gzip encoded > content to a client that hasn't advertised that it can accept such > content. There are a number of uglier issues with content negotiation > (hello byte ranges!), but I'd just like to see some tests for the > really basic stuff. > > Andy > > Mark C Nottingham writes: > > > > Here are some areas that seem to be common pitfalls. Comments/additions > > welcome; this is just a starting point. > [...] -- Mark Nottingham, Senior Developer Akamai Technologies (San Mateo, CA) From owner-wrec@cs.utk.edu Fri Jun 23 18:12:58 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id SAA20645 for ; Fri, 23 Jun 2000 18:12:58 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id SAA06966; Fri, 23 Jun 2000 18:12:58 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Fri, 23 Jun 2000 18:12:56 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id SAA06944; Fri, 23 Jun 2000 18:12:56 -0400 (EDT) Received: from pail.ircache.net (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id SAA06930; Fri, 23 Jun 2000 18:12:54 -0400 (EDT) Received: from pail.ircache.net (128.117.28.5 -> pail.scd.ucar.edu) by cs.utk.edu (smtpshim v1.0); Fri, 23 Jun 2000 18:12:54 -0400 Received: from localhost (rousskov@localhost) by pail.ircache.net (8.9.2/8.8.7) with ESMTP id QAA47327; Fri, 23 Jun 2000 16:12:50 -0600 (MDT) (envelope-from rousskov@ircache.net) Date: Fri, 23 Jun 2000 16:12:50 -0600 (MDT) From: Alex Rousskov To: Mark Nottingham cc: wrec@cs.utk.edu Subject: Re: HTTP Compliance tests In-Reply-To: <20000623140502.H21037@akamai.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII List-Unsubscribe: On Fri, 23 Jun 2000, Mark Nottingham wrote: > Also, it would be nice (maybe I'm dreaming here) to test a history of > products, not just the most recent a vendor has to offer. From the logs I've > looked at, there are a *lot* of old proxies out there. Mark, The above should not be a problem if the development model I am advocating is accepted: The compliance testing tool is a collection of tests. To add a test to the tool, one needs to get enough "votes" from the "interested parties" participating in the tool development. All test results are kept private. If you are interested in testing old proxies, there will be nothing preventing you from running those tests. This is _not_ a competition so one can test any product one has access to. $0.02, Alex. From owner-wrec@cs.utk.edu Mon Jun 26 06:47:13 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id GAA29407 for ; Mon, 26 Jun 2000 06:47:13 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id GAA23609; Mon, 26 Jun 2000 06:46:58 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Mon, 26 Jun 2000 06:46:49 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id GAA23587; Mon, 26 Jun 2000 06:46:49 -0400 (EDT) Received: from ietf.org (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id GAA23574; Mon, 26 Jun 2000 06:46:47 -0400 (EDT) Received: from ietf.org (132.151.1.176 -> odin.ietf.org) by cs.utk.edu (smtpshim v1.0); Mon, 26 Jun 2000 06:46:47 -0400 Received: from CNRI.Reston.VA.US (localhost [127.0.0.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id GAA29386; Mon, 26 Jun 2000 06:46:45 -0400 (EDT) Message-Id: <200006261046.GAA29386@ietf.org> Mime-Version: 1.0 Content-Type: Multipart/Mixed; Boundary="NextPart" To: IETF-Announce:; Cc: wrec@cs.utk.edu From: Internet-Drafts@ietf.org Reply-to: Internet-Drafts@ietf.org Subject: I-D ACTION:draft-ietf-wrec-taxonomy-04.txt Date: Mon, 26 Jun 2000 06:46:45 -0400 Sender: nsyracus@cnri.reston.va.us List-Unsubscribe: --NextPart A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Web Replication and Caching Working Group of the IETF. Title : Internet Web Replication and Caching Taxonomy Author(s) : I. Cooper, I. Melve, G. Tomlinson Filename : draft-ietf-wrec-taxonomy-04.txt Pages : 36 Date : 23-Jun-00 This memo specifies standard terminology and the current taxonomy of web replication and caching infrastructure deployed today. It introduces standard concepts and protocols used today within this application domain. Currently deployed solutions employing these technologies are presented to establish a standard taxonomy. Known problems with caching proxies are covered in an accompanying document[23], and are not part of this document. This document presents open protocols and points to published material for each protocol. A URL for this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-wrec-taxonomy-04.txt Internet-Drafts are also available by anonymous FTP. Login with the username "anonymous" and a password of your e-mail address. After logging in, type "cd internet-drafts" and then "get draft-ietf-wrec-taxonomy-04.txt". A list of Internet-Drafts directories can be found in http://www.ietf.org/shadow.html or ftp://ftp.ietf.org/ietf/1shadow-sites.txt Internet-Drafts can also be obtained by e-mail. Send a message to: mailserv@ietf.org. In the body type: "FILE /internet-drafts/draft-ietf-wrec-taxonomy-04.txt". NOTE: The mail server at ietf.org can return the document in MIME-encoded form by using the "mpack" utility. To use this feature, insert the command "ENCODING mime" before the "FILE" command. To decode the response(s), you will need "munpack" or a MIME-compliant mail reader. Different MIME-compliant mail readers exhibit different behavior, especially when dealing with "multipart" MIME messages (i.e. documents which have been split up into multiple messages), so check your local documentation on how to manipulate these messages. Below is the data which will enable a MIME compliant mail reader implementation to automatically retrieve the ASCII version of the Internet-Draft. --NextPart Content-Type: Multipart/Alternative; Boundary="OtherAccess" --OtherAccess Content-Type: Message/External-body; access-type="mail-server"; server="mailserv@ietf.org" Content-Type: text/plain Content-ID: <20000623143654.I-D@ietf.org> ENCODING mime FILE /internet-drafts/draft-ietf-wrec-taxonomy-04.txt --OtherAccess Content-Type: Message/External-body; name="draft-ietf-wrec-taxonomy-04.txt"; site="ftp.ietf.org"; access-type="anon-ftp"; directory="internet-drafts" Content-Type: text/plain Content-ID: <20000623143654.I-D@ietf.org> --OtherAccess-- --NextPart-- From owner-wrec@cs.utk.edu Wed Jun 28 09:43:22 2000 Received: from cs.utk.edu (CS.UTK.EDU [128.169.94.1]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id JAA22926 for ; Wed, 28 Jun 2000 09:43:22 -0400 (EDT) Received: from localhost (daemon@localhost) by cs.utk.edu with SMTP (cf v2.9s-UTK) id JAA11594; Wed, 28 Jun 2000 09:43:14 -0400 (EDT) Received: by cs.utk.edu (bulk_mailer v1.13); Wed, 28 Jun 2000 09:42:59 -0400 Received: by cs.utk.edu (cf v2.9s-UTK) id JAA11563; Wed, 28 Jun 2000 09:42:59 -0400 (EDT) Received: from rvs.uni-hannover.de (marvin@localhost) by cs.utk.edu with ESMTP (cf v2.9s-UTK) id JAA11515; Wed, 28 Jun 2000 09:42:40 -0400 (EDT) Received: from rvs.uni-hannover.de (130.75.3.211 -> lanai.rvs.uni-hannover.de) by cs.utk.edu (smtpshim v1.0); Wed, 28 Jun 2000 09:42:45 -0400 Received: from animal.rvs.uni-hannover.de (animal.rvs.uni-hannover.de [130.75.3.208]) by rvs.uni-hannover.de (8.9.1/8.9.1) with ESMTP id PAA14924; Wed, 28 Jun 2000 15:42:00 +0200 (MET DST) Date: Wed, 28 Jun 2000 15:41:54 +0200 (CEST) From: "Jens-S. Voeckler" To: tf-cache@terena.nl, wrec@cs.utk.edu Subject: Proceedings from the BOF on log file analysis Message-ID: MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="1266864131-1956264438-962199714=:1206" List-Unsubscribe: This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. Send mail to mime@docserver.cac.washington.edu for more info. --1266864131-1956264438-962199714=:1206 Content-Type: TEXT/PLAIN; charset=ISO-8859-1 X-MIME-Autoconverted: from 8bit to quoted-printable by cs.utk.edu id JAA11594 Content-Transfer-Encoding: quoted-printable Hi, please find attached the proceedings from the BOF on log file analysis and related topics from the 5th WCW in Lisbon, 24th of May, 2000. Le deagh dh=F9rachd, Dipl.-Ing. Jens-S. V=F6ckler (voeckler@rvs.uni-hannover.de) Institute for Computer Networks and Distributed Systems University of Hanover, Germany; +49 511 762 4726 --1266864131-1956264438-962199714=:1206 Content-Type: TEXT/plain; name="Lisbon-Meeting.txt" Content-ID: Content-Description: BOF on log file analysis Content-Disposition: attachment; filename="Lisbon-Meeting.txt" Content-Transfer-Encoding: BASE64 TWludXRlcyBGcm9tIENhY2hlIExvZ3MgQW5hbHlzaXMgQi5vLkYNCjV0aCBD YWNoaW5nIFdvcmtzaG9wLCBMaXNib246IDI0LzUvMDANCi0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0NCg0KQ2hhaXI6CQlKZW5zLVMu IFb2Y2tsZXINClByZXNlbnQ6CUpvaG4gRGVuaG9sbSwgTWF0aWphIEdyYWJu YXIsIFNlcmdlIEtyYXNobm92LA0KCQlHZW9yZ2UgTmVpc3NlciwgSGVucmlr IE5vcmRzdHL2bSwgQWxleGVpIE5vdmlrb3YsDQoJCVdvanRlayBTeWx3ZXN0 cnphaywgRHVhbmUgV2Vzc2Vscw0KDQoNCkFnZW5kYQ0KLS0tLS0tDQoNCiAt IExvZyBBb255bWl6YXRpb24NCiAtIFN0YW5kYXJkIExvZyBGb3JtYXQgRGVz Y3JpcHRvcg0KIC0gTmF0dXJlIG9mIExvZyBTdGF0aXN0aWNzDQoNCg0KQW5v 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