We experience a slow read performance with a high read latency in vSphere/ESXi on our Equallogic iSCSI array (14x 750gb in RAID10). We checked already very much but cannot find anything.
2x 1gig intel 85276 connected to a dell 5524 with Jumbo frames on and flow control off.
Equallogic connect to the Dell 5524 switch, with jumbos on.
Everything is running on default VLAN1, we still need to create a sepearate vlan for the equallogic and host.
Our vmK setup:
Our benchmarks with atto in a Windows VM:
Write performance is without multipath and with multipath fine, it does perform well. But read is terrible slow.
Does anyone know where we can search to fix this?