A:
do we have any standard higher than higher-than-normal priority numbers to use for resilvering?
in other words:# echo zfs_resilver_delay/W1 |mdb -kw
# echo zfs_resilver_min_time_ms/W0t4000|mdb -kw
what is safe beyond this?
B:
Could set to 0 & 5000....
# echo zfs_resilver_delay/W0 |mdb -kw# echo zfs_resilver_min_time_ms/W0t5000|mdb -kw
Will increase resilver performance dramatically, however this will also effect the overall performance by consuming more CPU/memory & increasing IO to disks. This should only be done "out of business hours" to minimize impact.
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The tuneables are as as follows
zfs_resilver_min_time_ms
zfs_resilver_delay
From NMC you can view the current settings using
show appliance nms property sys_zfs_resilver_min_time #default is 3000
show appliance nms property sys_zfs_resilver_delay #default is 2
These can be amended to 5000 for sys_zfs_resilver_min_time, and either 1 or 0 for sys_zfs_resilver_delay. It may be best to set to 1 initially, and if there is no effect on I/O then it can be set to 0 (ie no delay).
setup appliance nms property sys_zfs_resilver_min_time
setup appliance nms property sys_zfs_resilver_delay
Once the resilver is finished i would recommend setting these back to the default again. Once the resilver has finished, please provide an updated zpool status output
