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What’s new in vSphere 5.1 part 7 September 25, 2012

Posted by vbry21 in Uncategorized.
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One of the courses I teach is Site Recovery Manager 5.0, within the course we install, configure and manage vSphere replication; this allows us to replicate and then migrate or failover VMs from our production to our recovery sites without the need of specialist SANs.

Good news is that we now get this functionality natively within VMware vSphere 5.1. With this technology, a virtual machine is replicated by components of the hypervisor, removing any dependency on the underlying storage, and without the need for storage-level replication.

VMs can be replicated between any type of storage platform for example you can replicate between VMFS and NFS or from iSCSI to local disk.  Because vSphere replication works above the storage layer it can replicated independently of the file systems.

Replication is controlled as a property of the VM itself and its VMDKs, eliminating the need to configure storage any differently or to impose constraints on storage layout or management.  If the VM is changed or migrated then the policy for replication will follow the VM.

vSphere replication creates a “shadow VM” at the recovery side, then populates the VM’s data through replication of changed data. This is not however Fault tolerance.

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