Performance recommendations for Instant Recovery for VMware
After Instant Recovery, the virtual machine is on an NFS-attached datastore that is presented by the NetBackup media server. The performance of the virtual machine and of Storage vMotion depends on the following: the network speed and latency between the ESXi host and the media server, and the speed of NetBackup storage that the backup is recovered from.
Veritas recommends the following:
A SAN connection from the NetBackup media server to its disk storage unit.
For Fibre Channel SAN, a minimum speed of 4 gigabits per second.
For iSCSI SAN, a minimum speed of 1 gigabit per second.
When you use Storage vMotion to migrate a restored virtual machine, migrate one virtual machine at a time per media server. The migration may be slow if you simultaneously migrate multiple virtual machines per media server.
For disaster recovery testing, Veritas recommends that you restore no more than three or four virtual machines per media server. The number to restore depends on the I/O load on the media server. Veritas recommends restoring each VM one-by-one, not simultaneously.
Note:
For large-scale recovery of multiple virtual machines, use the virtual machine restore feature in the Backup, Archive, and Restore interface. Do not use Instant Recovery for VMware.