Use https://github.com/richardelling/tools/blob/master/iscsisvrtop to observe iscsi I/O
ср, 27 сент. 2017 г. в 11:06, anthony omnios <icoomn...@gmail.com>: > Hi, > > i have a problem, i used many ISCSI zvol (for each vm), network traffic is > 2MB/s between kvm host and filer but i write on disks many more than that. > I used a pool with separated mirror zil (intel s3710) and 8 ssd samsung > 850 evo 1To > > zpool status > pool: filervm2 > state: ONLINE > scan: resilvered 406G in 0h22m with 0 errors on Wed Sep 20 15:45:48 2017 > config: > > NAME STATE READ WRITE CKSUM > filervm2 ONLINE 0 0 0 > mirror-0 ONLINE 0 0 0 > c7t5002538D41657AAFd0 ONLINE 0 0 0 > c7t5002538D41F85C0Dd0 ONLINE 0 0 0 > mirror-2 ONLINE 0 0 0 > c7t5002538D41CC7105d0 ONLINE 0 0 0 > c7t5002538D41CC7127d0 ONLINE 0 0 0 > mirror-3 ONLINE 0 0 0 > c7t5002538D41CD7F7Ed0 ONLINE 0 0 0 > c7t5002538D41CD83FDd0 ONLINE 0 0 0 > mirror-4 ONLINE 0 0 0 > c7t5002538D41CD7F7Ad0 ONLINE 0 0 0 > c7t5002538D41CD7F7Dd0 ONLINE 0 0 0 > logs > mirror-1 ONLINE 0 0 0 > c4t2d0 ONLINE 0 0 0 > c4t4d0 ONLINE 0 0 0 > > i used correct ashift of 13 for samsung 850 evo > zdb|grep ashift : > > ashift: 13 > ashift: 13 > ashift: 13 > ashift: 13 > ashift: 13 > > But i write a lot on ssd every 5 seconds (many more than the network > traffic of 2 MB/s) > > iostat -xn -d 1 : > > r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device > 11.0 3067.5 288.3 153457.4 6.8 0.5 2.2 0.2 5 14 filervm2 > 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 rpool > 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c4t0d0 > 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c4t1d0 > 0.0 552.6 0.0 17284.0 0.0 0.1 0.0 0.2 0 8 c4t2d0 > 0.0 552.6 0.0 17284.0 0.0 0.1 0.0 0.2 0 8 c4t4d0 > 1.0 233.3 48.1 10051.6 0.0 0.0 0.0 0.1 0 3 > c7t5002538D41657AAFd0 > 5.0 250.3 144.2 13207.3 0.0 0.0 0.0 0.1 0 3 > c7t5002538D41CC7127d0 > 2.0 254.3 24.0 13207.3 0.0 0.0 0.0 0.1 0 4 > c7t5002538D41CC7105d0 > 3.0 235.3 72.1 10051.6 0.0 0.0 0.0 0.1 0 3 > c7t5002538D41F85C0Dd0 > 0.0 228.3 0.0 16178.7 0.0 0.0 0.0 0.2 0 4 > c7t5002538D41CD83FDd0 > 0.0 225.3 0.0 16210.7 0.0 0.0 0.0 0.2 0 4 > c7t5002538D41CD7F7Ed0 > 0.0 282.3 0.0 19991.1 0.0 0.0 0.0 0.2 0 5 > c7t5002538D41CD7F7Dd0 > 0.0 280.3 0.0 19871.0 0.0 0.0 0.0 0.2 0 5 > c7t5002538D41CD7F7Ad0 > > I used zvol of 64k, i try with 8k and problem is the same. > > zfs get all filervm2/hdd-110022a : > > NAME PROPERTY VALUE SOURCE > filervm2/hdd-110022a type volume - > filervm2/hdd-110022a creation Tue May 16 10:24 2017 - > filervm2/hdd-110022a used 5.26G - > filervm2/hdd-110022a available 2.90T - > filervm2/hdd-110022a referenced 5.24G - > filervm2/hdd-110022a compressratio 3.99x - > filervm2/hdd-110022a reservation none default > filervm2/hdd-110022a volsize 25G local > filervm2/hdd-110022a volblocksize 64K - > filervm2/hdd-110022a checksum on default > filervm2/hdd-110022a compression lz4 local > filervm2/hdd-110022a readonly off default > filervm2/hdd-110022a copies 1 default > filervm2/hdd-110022a refreservation none default > filervm2/hdd-110022a primarycache all default > filervm2/hdd-110022a secondarycache all default > filervm2/hdd-110022a usedbysnapshots 15.4M - > filervm2/hdd-110022a usedbydataset 5.24G - > filervm2/hdd-110022a usedbychildren 0 - > filervm2/hdd-110022a usedbyrefreservation 0 - > filervm2/hdd-110022a logbias latency default > filervm2/hdd-110022a dedup off default > filervm2/hdd-110022a mlslabel none default > filervm2/hdd-110022a sync standard local > filervm2/hdd-110022a refcompressratio 3.99x - > filervm2/hdd-110022a written 216K - > filervm2/hdd-110022a logicalused 20.9G - > filervm2/hdd-110022a logicalreferenced 20.9G - > filervm2/hdd-110022a snapshot_limit none default > filervm2/hdd-110022a snapshot_count none default > filervm2/hdd-110022a redundant_metadata all default > > Sorry for my bad english. > > What can be the problem ? thanks > > Best regards, > > Anthony > > > _______________________________________________ > OmniOS-discuss mailing list > OmniOS-discuss@lists.omniti.com > http://lists.omniti.com/mailman/listinfo/omnios-discuss >
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