Hello,
I have a single esx host in a cluster. On this host i have only 1 vm.
The esx host is connected to a eql group. In this group i have multiple pools and members. I have the same problem to all pools but for testing purposes i`ll stick to 1 member.
the member is a PS6100XV (24x 600gb 15k) in raid50.
this is member is connected to a stack of 4 powerconnects 62xx series.
the host is a dell poweredge r610 (but also a r620 gives the same problem).
the host is configured as the best pratices of equallogic state: 2vmknic's + 2 physical nics + heartbeat ip
Besides that is has 2 seperate dedicated nics for iscsi traffic from within the vm.
My test vm has 4vcpu and 8GB memory and 4 nics (2 for mgmt purposes and 2 for iscsi traffic).
In the vm i have installed the latest drivers from equallogic for iscsi MPIO
it has multiple drives:
c: (os) is a volume on a vmfs which resides on the ps61000xv
e: (testing) is a seperate volume on a seperate vmdk on a seperate vmfs which resides on the same ps6100xv
f: (testing) is a volume connected directly to the san through the ms iscsi mpio driver.
as a test i have run sqlio (http://tools.davidklee.net/sqlio.aspx)
i have run the same test over and over again on both e and f and it keeps giving me the same results.
Read performance is overall the same, but write performance is alot slower on a vmdk file then on a direct iscsi target.
I would it expect it to be the same, so am i wrong?
