I am looking for some feedback regarding benchmark testing on our new Netapp FAS2552 running 8.2RC17 Mode 7 with Vmware using Iscsi
I have connected the Netapp to Vmware ESXi 5.5 with a 10gb connection from the SAN to the switch and from the switch to the host. I set up iometre to test using using 4k blocks in sequential reads with outstanding IOPs at 16. I have limited the sample size 100mb, this effectively is making a cache run from the SAN and I have confirmed the read has 100% hit rate.
. I am surprised to see that the maximum number of iop,s is only 20,000 with less than 90 MB-s being utilised. I would have thought if the Netapp was serving 100% from cache memory the iop,s level would be significantly higher.
I have also benchmarked against a LUN from the Netapp directly into the Windows 2008 OS using the software initiator within the Windows operating system. I am seeing very similar performance. Given the fact that everything is being served from cache, does it seem right for iop,s at this level? Your thoughts would be greatly appreciated.