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Re: why backend iops increased by 5000 IOPS Although the frontend IOPS = 100?

 
RamyShaker
Occasional Contributor

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

1 REPLY 1
Cali
Honored Contributor

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.

ACP IT Solutions AGI'm not an HPE employee, so I can be wrong.