Strange ScaleIO throughput issue in Hyper-V environment

Hi Sergey,

Are you running the copies of  your application simultaneously? If yes - and then you can see max  throughput - most likely a single instance can't saturate the link enough to get there. We see it quite a lot, people try to test the speed with "cp" or "dd" tools - but most (if not all) single-threaded applications simply can't stress the disks enough.

I would suggest you to use IOmeter or FIO to test your performance.

Cheers,

Pawel

Hi Pawel,

Yes, I run tests simultaneously in the same VM. But the strange thing is, if I run the tests on the passthrough connected drive from JBOD shelf with NTFS, IO reach maximum available throughput with one copy of the application.

I'll try IOmeter and report the results.

Thank you.

BR,

Sergey