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09-17-2017 06:18 AM
09-17-2017 06:18 AM
why backend iops increased by 5000 IOPS Although the frontend IOPS = 100?
Hello ,
I do test as below
Copy a 200GB file with IO Size 1MB/sec
But using 3par charts Virtual volume IO Size 512KB/sec
IOPS on the virtual volume = 100 IOPS
but the backend iops on the physical Disks increased by 5000 IOPS
Note CPG is Raid 5 (3+1) , Step size 256KB .
My question why backend iops increased by 5000 IOPS Although the frontend IOPS = 100?
Thanks
Ramy Shaker
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09-19-2017 06:59 AM
09-19-2017 06:59 AM
Re: why backend iops increased by 5000 IOPS Although the frontend IOPS = 100?
I know this, but no details:
"Do not look at IOPS when doing sequential workloads, as the system will aggregate multiple IOs when going to the back-end. Use KiB/s instead."
At Random R5 1 IO generate 4 IOs at Backend.