Users Guide

General virtual disk recommendations

When designing a DR strategy by using VMware vCenter SRM and MD storage arrays, consider the following:

• Protection works on a datastore level (storage array virtual disk). All VMs that require protection on the same datastore as the

VM will also be protected and replicated.

• Use multiple small datastores and virtual disks to limit the size of data replicated across to the recovery site.

• Locate (migrate) protected VMs to the same datastore and migrate o any VMs that do not require protection.

• SRM does not provide for application-consistent failover, but VM-consistent failover. Therefore, even with a successful failover

of a VM, the applications that were running on the VM may not be in a consistent state and may require more recovery methods

to return to normal operation.

• MD storage arrays with rmware of 07.84.XX.XX or greater support remote replication groups, which are treated as a

consistency group. Therefore, all virtual disks within the RRG are treated as a single entity and failed over at the same time.

• Synchronization priority has a dramatic eect on the speed of replication. If sucient bandwidth is available between the peer

storage arrays, Dell recommends setting to high or highest.