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recovery times improved up to 30 seconds in AIX 7.2 TL 4
initial testing indicates code updates planned for future release reduces the recovery time by about 30 seconds.
AIX development has identified code changes that are believed to reduce the recovery time for the error described in this RFE. We are in process of testing these code changes to determine the exact amount of time by which the recovery will be reduced.
AIX development acknowledges there is opportunity for improvement in this area and this is a potential (uncommitted) candidate for inclusion in a future release of AIX.
------- Comment from RFE Community: JoshDaniel,Davis (0600029REF) at Convergeone Holdings Corp. on 2018-04-09 16:04:47.354 #243920 -------
Are you sure this is not a usage/configuration error?
If you have MPIO definitions for the LUN types, and have enabled fast failover and dynamic tracking, and have disabled SCSI reservation, then fail paths automatically get enabled and disabled as necessary. The only exception is if entirely new pathing shows up, that is only picked up by cfgmgr.
VIO is just AIX, and there is no magic for LUN config.
chdev -a fc_err_recov=fast_fail -a dyntrk=yes -Pl fscsi##
chdev -a queue_depth=64 -a reserve_policy=no_reserve -a algorithm=round_robin -Pl hdisk##
Though some MPIO definitons support load_balance instead of round_robin.
After you do those changes to everything, then you need to reboot, or at least deal with rmdev and mkdev.
The delay in bringing a Missing or Failed path back online is the healthcheck interval set on the hdisk.
Are you sure this is not a usage/configuration error?
If you have MPIO definitions for the LUN types, and have enabled fast failover and dynamic tracking, and have disabled SCSI reservation, then fail paths automatically get enabled and disabled as necessary. The only exception is if entirely new pathing shows up, that is only picked up by cfgmgr.
VIO is just AIX, and there is no magic for LUN config.
chdev -a fc_err_recov=fast_fail -a dyntrk=yes -Pl fscsi##
chdev -a queue_depth=64 -a reserve_policy=no_reserve -a algorithm=round_robin -Pl hdisk##
Though some MPIO definitons support load_balance instead of round_robin.
After you do those changes to everything, then you need to reboot, or at least deal with rmdev and mkdev.
The delay in bringing a Missing or Failed path back online is the healthcheck interval set on the hdisk.