Symantec NetBackup, Руководство пользователя

Страница: 67 / 168

■
Faster than a synthetic backup.
Regular synthetic backups are constructed on the media server. They are
moved across the network from the storage server to the media server and
synthesized into one image. The synthetic image is then moved back to the
storage server.
■
Requires no data movement across the network.
Regular synthetic backups use network traffic.
■
Uses fewer disk resources, depending on the vendor implementation.
The storage vendor determines the storage implementation. If the disk
appliance uses data deduplication, duplicate data is not created and stored.
In NetBackup, the Optimizedlmage attribute enables optimized synthetic backup.
It applies to both storage servers and disk pools.
If the original vendor plug-in exposed optimized synthetic backup functionality,
the storage server and disk pools inherited that functionality. However, if your
OpenStorage vendor updates their plug-in to add optimized synthetic backup
functionality, you have to update NetBackup.
See “Adding OpenStorage functionality to an existing environment” on page 102.
The following are the requirements for optimized synthetic backups:
■
The master and the media servers are at NetBackup version 6.5.4 or later.
■
The Enterprise Disk license key is installed on the NetBackup master server.
■
The plug-in from the disk appliance vendor supports the OpenStorage
OptimizedImage attribute.
■
The vendor plug-in is installed on each media server that connects to the
storage appliance.
■
The target storage unit's disk pool is the same disk pool on which the source
images reside.
About OpenStorage direct to tape
OpenStorage direct to tape lets you copy NetBackup backup images directly from
a disk appliance to tape. The copy operation does not use NetBackup media server
I/O.
NetBackup manages the copied images based on retention periods you define.
Direct to tape uses the Network Data Management Protocol (NDMP) for the copy
operations. Direct to tape requires specific NDMP features and release levels.
See “About NDMP requirements for OpenStorage direct to tape” on page 68.
67 Planning your deployment
About OpenStorage direct to tape