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Table 2-2
NetBackup deduplication servers
DescriptionHost
Onehostfunctionsasthestorageserverforadeduplicationnode;
that host must be a NetBackup media server. The storage server
does the following:
■ Writes the data to and reads data from the disk storage.
■ Manages that storage.
The storage server also deduplicates data. Therefore, one host
both deduplicates the data and manages the storage.
Only one storage serverexists for each NetBackup deduplication
node.
Youcan useNetBackupdeduplicationwith onemediaserverhost
only: the media server that is configured as the deduplication
storage server.
Deduplication storage
server
You can configure other NetBackup media servers to help
deduplicate data. They perform file fingerprint calculations for
deduplication, and they send the unique results to the storage
server. These helper media servers are called load balancing
servers.
See “About deduplication fingerprinting” on page 117.
You configure load balancing servers when you configure the
deduplication storage server. Also, you can add a deduplication
server later to a deduplication node.
Loadbalancingserversalsoperformrestoreandduplicationjobs.
Symantec recommends that you add load balancing servers only
after the storage server reaches maximum CPU utilization. For
more information about how to use load balancing servers, see
the following Symantec tech note:
http://entsupport.symantec.com/docs/338123
Load balancing server
About deduplication nodes
Amediaserver deduplicationnodeisa deduplicationstorageserver, loadbalancing
servers(if any),the clientsthat arebackedup, andthe storage.Each nodemanages
its own storage. Deduplication within each node is supported; deduplication
between nodes is not supported.
Multiplemedia serverdeduplication nodes canexist. Nodescannot share servers,
storage, or clients.
Planning your deployment
About the NetBackup Media Server Deduplication Option
22