Thks Mike, that explains it :) On Mar 16, 5:27 pm, Mike Christie <micha...@cs.wisc.edu> wrote: > On 03/16/2010 04:02 PM, bennyturns wrote: > > > I am trying work out a formula for total failover time of my > > multipathed iSCSI device so far I have: > > > failover time = nop timout + nop interval + replacement_timeout > > seconds + scsi block device timeout(/sys/block/sdX/device/timeout) > > /sys/block/sdX/device/timeout is the scsi cmd timeout. It only comes > into play if you have nops off or have their timers set higher than the > scsi cmd timeout (you do not want to do this). When using nops if they > timeout then if the scsi cmd timer fires, the iscsi code would basically > tell the scsi layer they it is handling the problem so do not run the > scsi error handler. > > So it is: > > failover time = nop timout + nop interval + replacement_timeout > or > /sys/block/sdX/device/timeout + replacement_timeout + min(abort, lun > reset timeoutt, target reset timeout). > > > Is there anything else that I am missing? > > > -b > > > On Mar 15, 4:53 pm, Mike Christie<micha...@cs.wisc.edu> wrote: > >> On 03/15/2010 05:56 AM, Alex Zeffertt wrote: > > >>> The bugzilla ticket requests a merge of two git commits, but neither of > >>> those contain the libiscsi.c change that addresses bug #2. Was this a > >>> mistake, or did you deliberately omit that part of your > >>> speed-up-conn-fail-take3.patch when you raised the ticket? > > >> Hey, > > >> It was laziness. I did not update the bugzilla. When I made it, I > >> thought we were only hitting #1 (this was the first patch I sent in this > >> thread). But when I was testing those 2 patches with RHEL 5, I finally > >> hit the problem that bet was hitting. When I figured out that we were > >> hitting #2, I made the second patch in this thread. I then just did not > >> update the bugzilla with the new patch. For RHEL I ended up sending the > >> second patch though. > >
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