Subject: Re: iSCSI Session Recovery - primary/secondary iSCSI targets?

From: "Julian Satran" <[email-masked]>
Date: Thu, 20 Dec 2001 03:00:39 +0200

Dave,

I am not sure what you are after.
As long as you don't kill or let the session die you can keep it alive by
replacing failing connections with new connections.
If you let the session die but would like to rebuild the session with the
target and initiator (the SCSI entities) perceiving the same nexus
you can do this too - within the bounds of the naming structures.

Julo

                    "Dave                                                                              
                    Francheski"           To:     Julian Satran/Haifa/IBM@IBMIL                        
                    <davef@seven-sy       cc:     <[email-masked]>                            
                    stems.com>            Subject:     iSCSI Session Recovery -                        
                                           primary/secondary iSCSI targets?                            
                    18-12-01 21:52                                                                     

Julian,

If there are multiple network paths from an iSCSI initiator to the *same*
iSCSI target,
and one of the paths permanently goes down, is there any *standardized* way
of performing Session Recovery such that the iSCSI initiator can point to
the
iSCSI target using the alternate/secondary network path?   This would imply
that the initiator would have to restart a session on a new set of
connection(s)
using the alternate network path (should the primary one continue to fail).

Perhaps one way is to use multiple iSCSI target names/portals to represent
each independent path through the network.   If this approach were taken,
there doesn't appear to be any standardized way of retrieving
*primary*/*secondary*
iSCSI target names during Session failure recovery.
(At least reading through section 8.11.4 of Draft 09 doesn't mention this.)

Best regards,
Dave Francheski
Seven Systems Technologies
575 Menlo Drive Suite 2
Rocklin CA
916-577-1281
[email-masked]