I'm still struggling with slow resilvering performance. There doesn't seem to
be any clear bottleneck at this point.. and it's going glacially slow.
scrub: resilver in progress for 11h2m, 27.86% done, 28h35m to go
Load averages are like 0.13-0.15 range, CPU usage is <10%, the machine is doing
nothing else. zpool iostat -v shows that read/write operations per second on
each disk are in the single digit range.
As these are decent 7200 RPM 3.5" disks, I know they can do more IOPS than than
that. I've seen it before.
Is there any way to give this process a kick in the pants and speed things up?
Because once this resilvering is done, I need to shuffle disks again and
resilver at least once more, if not twice... and at this rate, we're measuring
resilvering time in days!
Here's the zpool iostat -v output:
ga...@solaribyte:~# zpool iostat -v 1
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
olympic 2.15T 2.38T 88 6 10.6M 23.5K
raidz2 1.42T 2.21T 67 4 8.16M 14.9K
replacing - - 62 8 1.26M 107K
c14d0 - - 41 6 1.29M 107K
13143843205485599815 - - 0 0 13 2
c10d0 - - 14 1 1.39M 2.33K
replacing - - 67 3 1.36M 2.84K
c13d0 - - 44 2 1.39M 2.56K
c10d1 - - 0 16 61 1.37M
replacing - - 8 61 176K 1.20M
2673037112181665188 - - 0 0 0 0
c11d0 - - 7 57 178K 1.20M
c8t0d0 - - 42 1 1.39M 2.49K
c12d0 - - 3 0 117K 489
c7t0d0 - - 42 1 1.39M 2.45K
c8t1d0 - - 43 1 1.39M 2.36K
raidz2 750G 178G 20 2 2.43M 8.67K
replacing - - 20 2 1.22M 4.44K
c15d1 - - 16 1 1.24M 3.27K
8862062963069576548 - - 0 0 0 0
replacing - - 20 2 1.22M 4.36K
c16d1 - - 16 1 1.24M 3.20K
2970292359499355257 - - 0 0 10 1
replacing - - 0 0 0 1.88K
3106783608214265238 - - 0 0 0 0
348116080896813745 - - 0 0 10 1
replacing - - 0 20 0 1.21M
217004158856088173 - - 0 0 10 1
2711430129275390205 - - 0 0 10 1
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