Symantec NetBackup, Руководство пользователя, Страница: 66 / 168

The ability to duplicate backups to storage in other NetBackup domains, often
across various geographical sites, helps facilitate disaster recovery.
Both domains must have OpenStorage configured and working in their domains.
The OpenStorage devices must support replication.
You must use a storage lifecycle policy to copy the backup images to another
NetBackup domain. For information about how to configure duplication to a
remote master server, see NetBackup Administrator's Guide, Volume I.
For OpenStorage duplication to a remote master server, the source NetBackup
domain has no knowledge of the remote domain or its storage server. The
relationship between the source and the target domains is configured using the
disk appliance vendor's tools. When the appliances are configured properly,
NetBackup images on the source disk appliance are replicated automatically to
the target disk appliance. That disk appliance uses the OpenStorage API to notify
NetBackup that a replication event occurred. NetBackup then imports those
images.
Caution: If you also use optimized duplication within the same domain, correct
configuration is critical. For duplication to a remote master server, a target storage
server must not also be a storage server for the source domain. Therefore, choose
the target storage server or servers carefully.
The following are the requirements for optimized duplication to a remote
NetBackup domain:
■
The vendor must expose the off-host data movement capability in their plug-in.
■
Both the source and the destination disk pools must be the same OpenStorage
vendor type.
See “About OpenStorage optimized duplication methods” on page 64.
About OpenStorage optimized synthetic backups
One of the capabilities a vendor may expose is the disk appliance's potential to
construct synthetic backup images. A media server uses messages to instruct the
storage server which full and incremental backup images to use when creating
the synthetic backup. The storage server constructs (or synthesizes) the backup
image directly on the disk storage. In NetBackup, backups created in this way are
known as optimized synthetic backups.
The OpenStorage optimized synthetic backup method provides the following
benefits:
Planning your deployment
About OpenStorage optimized synthetic backups
66