Thanks for the response!! I will thoroughly review the readme and feedback any observations.
One question - how do I check whether the config parameter change has been set correctly? Do I just look at the config file in the /etc/iscsi/nodes/.... etc..../default? does not seem to show in iscsiadm -m session -P <1, 2 or 3> level.... thanks again - I am running a script overnight to soak and see if any networking hiccups would reproduce the symptoms now that I have changed the timeout value ... - a. On 6/4/08, Mike Christie <[EMAIL PROTECTED]> wrote: > > a s p a s i a wrote: >> Hello all, >> >> I have been wondering a given scenario, where a server boots linux >> over iscsiRoot; how would iscsi initiator handle, if for instance, >> access to the iscsiRoot device is interrupted for a second or two. A >> situation where this could possibly occur would be if one would add a >> new target in the /etc/ietd.conf in the iscsi-target host, and then do >> a restart, while certain hosts are booted against an iscsiRoot served >> by that same target. > > This is what the replacement timeout is for. Section 8 in the README > tries to describe how all those timers and scsi retries works. It is a > little confusing, because some of the info on timeouts and retries is > valuable for root and multipath but is only in the multipath section. > > Each scsi command gets 5 retries. If you were to disrupt iscsi service > by pulling cables or restarting targets then if the scsi command's > execution gets disrupted more than 5 times you will get a error to the FS. > > For each disruption you have replacement_timeout seconds to relogin to > the target. If replacement_timeout expires then it does not matter how > many scsi command retries you have left, the command will be failed and > you will get an error to the FS. > > You really really want to use dm-multipath with iscsi. With dm-multipath > there are lots of fun settings for if all paths should fail or look like > they have failed (for example if you reboot the target or pull cables). > >> >> Any thoughts? >> >> Have there been any past discussions on this or any papers/techtips >> that may address this kind of situation? >> > > It has been discussed a lot on the list and that is why I tried to > comment on it in the README. If you could read that and give me some > feedback so it is more useful for others in the future it would be helpful. > > > > -- A S P A S I A . . . . . . . . . . .. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to open-iscsi@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/open-iscsi -~----------~----~----~----~------~----~------~--~---
