Greetings, everyone.
I encountered strange activity in my company's storage area network (BTW, I'm totally noob in this field).
In short:
ESXi hosts and VMs disk throughput rate is from 24 MiBps to 130 MiBps, although we're using HP Brocade 8 Gb switches working at 8 Gb speed and HP 3PAR StoreServ 7400 which was checked by HP tech support team for possible miconnfigurations and performance bottlenecks (none of them were found).
We have the following setup:
I made tests for the following situation:
2 servers per rack: one is ESXi 5.5.0 and other is Windows Server 2012 R2
2 LUNs per every server: one is on 7400 and other is on 7400 #2.
My results are:
Therefore I have 25-35 MiBps on LUNs which are plugged as VMFS datatores to ESXi hosts and 250-500 MiBps when LUNs are plugged to Windows server (I installed W2K12 R2 just on Blade server).
Also I tested LUNs with Crystal Disk Mark and even got 1600 MiBps.
Do you have any ideas where to start from?