About the NetBackup Accelerator for virtual machines
NetBackup Accelerator reduces the backup time for VMware backups. NetBackup uses VMware Changed Block Tracking (CBT) to identify the changes that were made within a virtual machine. Only the changed data blocks are sent to the NetBackup media server, to significantly reduce the I/O and backup time. The media server combines the new data with previous backup data and produces a traditional full NetBackup image that includes the complete virtual machine files.
Note:
Accelerator is most appropriate for virtual machine data that does not experience a high rate of change.
Accelerator has the following benefits:
Performs the full backups faster than traditional backup. Creates a compact backup stream that uses less network bandwidth between the backup host and the server.
Accelerator sends only changed data blocks for the backup. NetBackup then creates a full traditional NetBackup image that includes the changed block data.
Accelerator backups support Granular Recovery Technology (GRT) for restoring Exchange, SQL, and SharePoint applications (using a full schedule only).
Accelerator backups (full and incremental) support instant recovery of virtual machines.
If the option on the policy VMware tab is enabled, you can restore individual files from the backup (full or incremental).
Reduces the I/O on the backup host.
Reduces the CPU load on the backup host.
See How the NetBackup Accelerator works with virtual machines.