Hi All,
I have a question to see if I have missed anything obvious prior to opening a HP and VMware case for this.
We have a new 3Par 7400 array, 8 DL 360 Gen 9 hosts with HP (Emulex rebrand) Lpe12000 series HBA 8GB.
At the moment the hosts are running a handful of VM's for Vcenter, VUM, storage management etc, on a single host we presented some LUNS (SSD R1, FC R1, FC R5 etc) and created separate datastores, created a New 2012R2 VM and some smallish 20gb disks on each of the datastores. The VM is running LSI Logic SAS controller. 4CPU and 16GB Ram. MP is set to RR.
Running IO Meter with 4k 50% Read 0% Radom, we are seeing sub 1000 IOPS coming from the disks, as a comparison an RDM disk was presented in physical mode to this VM, this is getting some 42K IOPS.
I have confirmed that the max queue depth setting has been applied to the LUN as per 3par best practices, also the Disk.QfullSampleSize and Disk.QFullThreshold. The host is running update 3, and firmware is up to date. The Array is built up of 16 SSD, 64 FC and 24 NL disks. Assigning disks directly from the SSD doesn't seem to improve the performance.
The max latency is also huge around 170 ms in IO Meter, the average seems ok, however ESXTOP doesn't see anything like this latency, neither does the array controller its self, both see around 1.5ms. From an RDM I see max IO 8ms, average 0.3.
Anyone have any suggestions from a Host or VM configuration point of view?
Rich
