Hi there
We have a system that needs 100k+ IOPS but for some strange reason we cannot get past about 70k IOPS. The server is Windows VM on ESXi with two FC HBAs running 8G. (we have adjusted queue depth etc.) The server is connected to the NetApp via two Brocade 6510 switches. The clusters we have tested up against are an A300 with 24 x 7TB SSD. And an A700 with a mixed setup of shelfs (two disk loops with quad cabling). But even up against the A700 we cannot seem to get past the 70k IOPS.
Now we have read about the concurrency on a NetApp system, where each volume is assigned a CPU core, which might be our problem.. https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP...
Our storage setup is a volume with a LUN which is presented to the host, which then creates a VMFS as a datastore… We have tried to create two LUNs on separate volumes, and we can pull out 70k on each, at the same time… which seems to point towards the concurrency… But is there a way around this? We would rather not have multiple LUNs, but rather one LUN.
Any input would be helpful 😊
/Heino