On Mon, Apr 25, 2011 at 4:45 PM, Richard Elling
<richard.ell...@gmail.com> wrote:
> If there is other work going on, then you might be hitting the resilver
> throttle. By default, it will delay 2 clock ticks, if needed. It can be turned
There is some other access to the pool from nfs and cifs clients, but
not much, and mostly reads.
Setting zfs_resilver_delay seems to have helped some, based on the
iostat output. Are there other tunables?
> Probably won't work because it does not make the resilvering drive
> any faster.
It doesn't seem like the devices are the bottleneck, even with the
delay turned off.
$ iostat -xn 60 3
extended device statistics
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
369.2 11.5 5577.0 71.3 0.7 0.7 1.9 1.9 14 29 c2t0d0
371.9 11.5 5570.3 71.3 0.7 0.7 1.7 1.8 13 29 c2t1d0
369.9 11.5 5574.4 71.3 0.7 0.7 1.8 1.9 14 29 c2t2d0
370.7 11.5 5573.9 71.3 0.7 0.7 1.8 1.9 14 29 c2t3d0
368.0 11.5 5553.1 71.3 0.7 0.7 1.8 1.9 14 29 c2t4d0
196.1 172.8 2825.5 2436.6 0.3 1.1 0.8 3.0 6 26 c2t5d0
183.6 184.9 2717.6 2674.7 0.5 1.3 1.4 3.5 11 31 c2t6d0
393.0 11.2 5540.7 71.3 0.5 0.6 1.3 1.5 12 26 c2t7d0
95.8 1.2 95.6 16.2 0.0 0.0 0.2 0.2 0 1 c0t0d0
0.9 1.2 3.6 16.2 0.0 0.0 7.5 1.9 0 0 c0t1d0
extended device statistics
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
891.2 11.8 2386.9 64.4 0.0 1.2 0.0 1.3 1 36 c2t0d0
919.9 12.1 2351.8 64.6 0.0 1.1 0.0 1.2 0 35 c2t1d0
906.9 12.1 2346.1 64.6 0.0 1.2 0.0 1.3 0 36 c2t2d0
877.9 11.6 2351.0 64.5 0.7 0.5 0.8 0.6 23 35 c2t3d0
883.4 12.0 2322.0 64.4 0.2 1.0 0.2 1.1 7 35 c2t4d0
0.8 758.0 0.8 1910.4 0.2 5.0 0.2 6.6 3 72 c2t5d0
882.7 11.4 2355.1 64.4 0.8 0.4 0.9 0.4 27 34 c2t6d0
907.8 11.4 2373.1 64.5 0.7 0.3 0.8 0.4 23 30 c2t7d0
1607.8 9.4 1568.2 83.0 0.1 0.2 0.1 0.1 3 18 c0t0d0
7.3 9.1 23.5 83.0 0.1 0.0 6.0 1.4 2 2 c0t1d0
extended device statistics
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
960.3 12.7 2868.0 59.0 1.1 0.7 1.2 0.8 37 52 c2t0d0
963.2 12.7 2877.5 59.1 1.1 0.8 1.1 0.8 36 51 c2t1d0
960.3 12.6 2844.7 59.1 1.1 0.7 1.1 0.8 37 52 c2t2d0
1000.1 12.8 2827.1 59.0 0.6 1.2 0.6 1.2 21 52 c2t3d0
960.9 12.3 2811.1 59.0 1.3 0.6 1.3 0.6 42 51 c2t4d0
0.5 962.2 0.4 2418.3 0.0 4.1 0.0 4.3 0 59 c2t5d0
1014.2 12.3 2820.6 59.1 0.8 0.8 0.8 0.8 28 48 c2t6d0
1031.2 12.5 2822.0 59.1 0.8 0.8 0.7 0.8 26 45 c2t7d0
1836.4 0.0 1783.4 0.0 0.0 0.2 0.0 0.1 1 19 c0t0d0
5.3 0.0 5.3 0.0 0.0 0.0 1.1 1.5 1 1 c0t1d0
--
Brandon High : bh...@freaks.com
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