I have something weird going on. Have a Win7 VM with the OS drive on a qcow vdisk on local storage. Have a second qcow vdisk on a NFS share and a third vdisk on an iSCSI LVM. Using iometer in an attempt to benchmark NFS vs iSCSI performance. With iSCSI I can see it both reading from & writing to my SAN but with NFS I can only see it writing
..there appears to be no reads on the SAN.
When I attempt to benchmark vdisks stored on the local storage I also get impossible read speeds.
Is there some sort of disk caching going on? I have each hard disk set to "Default (no cache)" under the cache setting.
When I attempt to benchmark vdisks stored on the local storage I also get impossible read speeds.
Is there some sort of disk caching going on? I have each hard disk set to "Default (no cache)" under the cache setting.