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abugeja
Hot Shot
Hot Shot

Migration of VM's from Fibre Channel to VSAN/hyper converged?

Hi,

Currently all our VM's are on fibre attached datastores in a HP Blade environment. If we moved to a VSAN or a hyper converged environment I assume there would be an outage as the datastores will no longer be shared datastores.

So I assume you would need to shutdown the VM and migrate it off to the VSAN/hyper converged environment or is there a way to present the VSAN/hyper convered datastores to your traditional environment?

Thanks

3 Replies
rcporto
Leadership
Leadership

With release of VSAN 6.5 you can expose your VSAN to hosts outside of VSAN cluster through iSCSI, see: http://www.yellow-bricks.com/2016/10/18/new-virtual-san-6-5/

Another option is present your current datastore to your new hyper-converged solution through NFS/iSCSI (if your storage array supports).

But, since vSphere version 5.1, you can migrate virtual machine between hosts even without shared storage, this is what VMware call shared-nothing or enhanced vMotion, see: Leveraging VMware's Enhanced Shared-Nothing vMotion - Wahl Network

So, the storage will not be the problem... I believe that you should worry about the processors compatibility, because if they differ, you will not be able to migrate online unless you enable EVC.

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Richardson Porto
Senior Infrastructure Specialist
LinkedIn: http://linkedin.com/in/richardsonporto
Bill_Oyler
Hot Shot
Hot Shot

You can migrate from Fibre Channel datastores to your vsanDatastore using "XvMotion" (sometimes called "Unified vMotion") which was introduced in ESXi 5.1.  This allows you to migrate VMs between ESXi hosts and datastores with zero downtime.  Essentially it is a vMotion combined with Storage vMotion in single operation.  You can do this between clusters, and even between different versions of ESXi.  For example your HP blade cluster might be running ESXi 5.5 and your new VSAN cluster might be running ESXi 6.0U2.  As long as you configure the EVC mode on the new VSAN cluster to the same EVC baseline as your existing cluster, you'll be able to perform XvMotion across clusters, from your Fibre Channel datastores to your vsanDatastore, with zero downtime.  You must use the vSphere Web Client (not C# Windows Client).

Bill Oyler Systems Engineer
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nmalick
Contributor
Contributor

I hope this link will help you to understand the way we can do the Migration from SAN/NAS to vSAN

Migration approaches of VM from SAN/NAS to vSAN