Disk i/o

Hello, I just take on an environment VMware VSphere, there are a few points I'd like to share here.

Sometimes a BD Oracle becomes slow. This comic is installed on a Windows 2008 R2 virtual machine. I looked in disk performance and sometimes the time of this disc comes to 500 ms I think it's a longer time.

so... I'm afraid that this structure of connections beetwen VMware Hosts (there are two in cluster) and the storage is not also be recommending.

There is only an ISCSI SAN connection between each VMware host and storage. each host has 12 VMs.

What do you think only a connection with storage? It is little? If I put more than one connection for each VMware host maybe I'll feel more speed!

Thank you

You will need to know where is the latency. Where you see the 500ms latency?

In addition, check the SCSI communication errors registers vmkernel, sometimes the problem is in a bad cable/switch port.

Tags: VMware

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