Using PPME while HYPER-V VMs are up

Question

Hello,I am looking to migrate a FC Hyper V cluster from the clariion to an ISCSI Hyper V cluster setup on the VNX. My thought is move the guests to one host, migrate and then add the rest of the hosts to the storage group on the VNX and rescan each host. The question the Windows team had for me is if PPME can be used while the guests are online or should the guests be brought offline while PPME (Power Path Migration Enabler) is being used. If there is a white paper(didn't find one when I initially searched) or if someone has a suggestion based on expericence,please let me know - Admingirl

dynamox · Answer

not licensed for storage VMotion ?

dynamox · Answer

Oops..it's hyper-V, Hyper-v 3.0 (windows 8) will finally have live storage vmotion.

admingirl · Answer

Tnank you Dynamox, we're using live Migration for our Hyper V guests

admingirl · Answer

I looked in Powerlink and did not find anything specific for this task. We have five nodes in the cluster.

dynamox · Answer

if you don't see it in PPME admin guide i am afraid it's not supported or has not been tested. Live Migration uses clustered shared volumes (Basically Microsoft clustering) to allow concurrent access to one LUN from multiple nodes. If you look at PPME admin guide, there is a section the describes how to migrate Win2k8 clusters, there is an outage involved (during PPME commit step), plus there can only be one active node in the cluster, all other nodes need to be offline. It's probably not very likely that your your cluster nodes are sized big enough where you could move all VMs to just one node. Also the quorum (witness) disk can not be migrated with PPME.

You might have to fall back to using SanCopy.

VNX

Using PPME while HYPER-V VMs are up

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