I am looking to interpret the IOPS from a few runs of bonnie++ using iostat simultaneously and using the benchmarking from this post:
Can I determine IOPS on a disk array using bonnie++?bonnie++ run:
/usr/sbin/bonnie++ -d /data -s 128754 -u root:root -qfb
2x memory on the /data filesystem. This system is very fast, with SSDs in a raid6 Array.
Bonnie++ random seeks show 657.9 seeks per second:
Version 1.96 ------Sequential Output------ --Sequential Input- --Random- Concurrency 1 -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP splunk6-w2- 128754M 695761 97 480604 70 1407252 88 657.9 110 Latency 32464us 94804us 16869us 7398us Version 1.96 ------Sequential Create------ --------Random Create-------- splunk6-w2-inf -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 16 8057 18 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ Latency 154us 355us 356us 154us 10us 60us 1.96,1.96,splunk6-w2-inf,1,1393273639,128754M,,,,695761,97,480604,70,,,1407252,88,657.9,110,16,,,,,8057,18,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,,32464us,94804us,,16869us,7398us,154us,355us,356us,154us,10us,60us
I was running iostat at the same time bonnie++ was generating its test files and tps results are really high:
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn dm-2 292.61 1847.92 2282.89 928897994 1147544976 avg-cpu: %user %nice %system %iowait %steal %idle 0.13 0.00 3.73 0.00 0.00 96.15 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn dm-2 41035.00 8.00 328272.00 8 328272 avg-cpu: %user %nice %system %iowait %steal %idle 0.06 0.00 6.31 0.00 0.00 93.62 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn dm-2 225280.00 0.00 1802240.00 0 1802240 avg-cpu: %user %nice %system %iowait %steal %idle 0.13 0.00 7.09 0.44 0.00 92.35 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn dm-2 251050.00 0.00 2008392.00 0 2008392 avg-cpu: %user %nice %system %iowait %steal %idle 0.09 0.00 9.41 0.00 0.00 90.50 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn dm-2 277187.00 8.00 2217488.00 8 2217488
I would expect the Bonnie++ stats to be higher: I’ve tested on older machines showing higher random seeks. What’s the best representation of IOPS based on these stats, or should I gather them another way? Since those are the tools I have available, I am currently focusing on iostat and bonnie++.
Thanks.
Answer
What are you expecting? Your results look fine. The tps
figure is what you should be monitoring if you’re specifically trying to determine IOPS. But are you just benchmarking for benchmarking’s sake?
The best measure of something like this is a real application or a realistic usage scenario.
Attribution
Source : Link , Question Author : sonicz , Answer Author : ewwhite