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To: "pallavi shurpali" <spals123@hotmail.com>
Cc: ips@ece.cmu.edu, owner-ips@ece.cmu.edu
Subject: Re: Multiple TCP Connections
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owner-ips@ece.cmu.edu wrote on 14/04/2003 09:22:49:

> Hi ,
> 
>    1) Multiple TCP connections in iSCSI are required to for implementing 

> concurrency and for achieving failover in iSCSI. Can anyone illustrate 
> examples for these, so as to give me a better understanding about how 
this 
> works?
For concurrency - if a 4Gb/s link is what you need for your connection you 
should be able to aggregate 4 1Gb/s links.
Likewise if you have high availbaility requirements you should be able to 
continue operations as long as you can establish at least one connection
>    2) Do iSCSI tasks have to be executed in the same order as available 
from 
> the SCSI layer?. Secondly, can there be multiple tasks pending between 
an 
> Initiator and Target ?
> 
The order of execution is controlled by both SCSI and target.
Tagged task can be executed in one of several orderings
Several tasks can be pending.
> Thanx in advance,
> P.S
> 
> 
> 
> 
> 
> 
> _________________________________________________________________
> Beat piracy. Say no to it. http://www.msn.co.in/Computing/antipiracy/ 
News, 
> views and more

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<br>
<br><font size=2><tt>owner-ips@ece.cmu.edu wrote on 14/04/2003 09:22:49:<br>
<br>
&gt; Hi ,<br>
&gt; <br>
&gt; &nbsp; &nbsp;1) Multiple TCP connections in iSCSI are required to
for implementing <br>
&gt; concurrency and for achieving failover in iSCSI. Can anyone illustrate
<br>
&gt; examples for these, so as to give me a better understanding about
how this <br>
&gt; works?</tt></font>
<br><font size=2><tt>For concurrency - if a 4Gb/s link is what you need
for your connection you should be able to aggregate 4 1Gb/s links.</tt></font>
<br><font size=2><tt>Likewise if you have high availbaility requirements
you should be able to continue operations as long as you can establish
at least one connection<br>
&gt; &nbsp; &nbsp;2) Do iSCSI tasks have to be executed in the same order
as available from <br>
&gt; the SCSI layer?. Secondly, can there be multiple tasks pending between
an <br>
&gt; Initiator and Target ?<br>
&gt; </tt></font>
<br><font size=2><tt>The order of execution is controlled by both SCSI
and target.</tt></font>
<br><font size=2><tt>Tagged task can be executed in one of several orderings</tt></font>
<br><font size=2><tt>Several tasks can be pending.<br>
&gt; Thanx in advance,<br>
&gt; P.S<br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt; _________________________________________________________________<br>
&gt; Beat piracy. Say no to it. http://www.msn.co.in/Computing/antipiracy/
News, <br>
&gt; views and more<br>
</tt></font>
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