Hi - we are running ESXi 5.0 build 474610
Since upgrading our Netapp from 7.3.5.1P2 to 8.1RC2 our NFS datastores experience timeouts when doing vmware storage vMotions
The Netapp is logging these which are very disruptive for running VMs!:
[vm65-vf-02@irt-na03: NwkThd_00:warning]: NFS response to client x.y.z.125 for volume 0x1ba91f6(vm65net) was slow, op was v3 setattr, 185 > 60 (in seconds)
Researching a bit more, we wonder if we are hitting the UNMAP issue addressed in the Dec 15 (Security!?) patch
"In vSphere 5.0, Thin Provisioning is enabled by default on devices that adhere to T10 standards. On such thin provisioned LUNs, vSphere issues SCSI UNMAP commands to help the storage arrays reclaim unused space. Sending UNMAP commands might cause performance issues with operations such as snapshot consolidation or storage vMotion.
This patch resolves the issue by disabling the space reclamation feature, by default."
Does this apply to NFS datastores?
thanks
