Netbackup for ndmp server an nas system that serves

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NetBackup for NDMP serverAn NAS system that serves files to clients using HTTP, FTP,CIFS, or NFS protocols. It also runs an NDMP serverapplication that communicates with NDMP client backupsoftware to configure and perform backup and restore tasks.NAS systems provide fast, multi-protocol file access and costeffective data storage to workstations and servers in thenetwork or across the Internet.In a NetBackup configuration, the NDMP host is considereda client of NetBackup. However, NetBackup client softwareis never installed on an NDMP host.NDMP hostNDMP multiplexing concurrently writes multiple backupstreams to the same Media Manager tape storage devicefrom the same client or different clients. NDMP multiplexingimproves overall NetBackup performance by more efficientuse of the storage unit drives. State of the art storage devicescan typically stream data faster than client agents can createbackup streams. Therefore, multiple data streams can besent to and effectively processed by a given storage unit.Only remote NDMP multiplexing is supported.NDMP multiplexing12Introduction to NetBackup for NDMPAbout NetBackup for NDMP
Table 1-2Terminology(continued)DefinitionTermAn NDMP server application runs on an NDMP host and runsbackup, restore, and device control commands that it receivesfrom an NDMP-conformant backup application. The backupapplication (NetBackup) is considered an NDMP client. Aseparate instance of an NDMP server process exists for eachconnection to an NDMP client. That is, if two backups are inprogress, an NDMP server process exists for each backup.NDMP server applicationAn NDMP storage unit stores the backup data for an NDMPhost. The tape drives in this storage unit attach directly to theNDMP host or can be configured on a SAN. Note that NDMPstorage units cannot be used to store data for non-NDMPhosts, and NetBackup disk storage units cannot be used forNDMP tasks.NDMP storage unitIn a redirected restore, files are restored to a client other thanthe one from which they were originally backed up. InNetBackup for NDMP, the restore data travels from an NDMPhost (or NetBackup media server) with a locally attachedstorage device to another NDMP host on the network.Redirected restore (to adifferent client)A form of three-way backup and restore also known as NDMPbackup to Media Manager storage units. Data travels froman NDMP host to a tape drive that is attached to a NetBackupmedia server.See“Configuring NDMP backup to Media Manager storageunits”on page 66.Remote NDMPIn a three-way backup or restore, data travels between anNDMP host and a storage device that is attached to anotherNDMP host or to a NetBackup media server. This backupcontrasts with local NDMP backup or restore where the datatravels between an NDMP host’s disk and a storage devicedirectly attached to the same NDMP host.

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