Drive snapshot help11/10/2023 ![]() ![]() The host or entity that manages the backup on behalf of the NetBackup client. Other terms and trade names sometimes used for copy-on-write snapshots are space-optimized snapshots, space-efficient snapshots, and checkpoints.Ī copy operation as performed by a third-party copy device or NetBackup media server. The backup application uses this account to create the backup copy. The account describes which blocks in the client data have changed and which have not. It creates a block-by-block "account" from the instant the copy-on-write was activated. ![]() Unlike a mirror, a copy-on-write does not create a separate copy of the client's data. In NetBackup Snapshot Client, one of two types of supported snapshots (see also mirror). This cache must be a raw disk partition that does not contain valuable information: when you use the cache, the snapshot method overwrites any data currently stored there. The snapshot method uses the cache to store a copy of the client's data blocks that are about to change because of file system activity. ![]() Note that not all bridges function as third-party copy devices.Ĭopy-on-write snapshot methods need a separate working area on disk during the lifetime of the snapshot. A third-party copy device can be implemented as part of a bridge or as part of other devices. In a SAN network, a bridge connects SCSI devices to Fibre Channel. BCV stands for Business Continuance Volume. The mirror disk in an EMC primary-mirror array configuration (see mirror). ![]() The agent is either another client, the NetBackup media server, a third-party copy device, or a NAS filer. The alternate client performs a backup on behalf of another client.īackup agent (see also Third-Party Copy Device)Ī general term for the host that manages the backup on behalf of the NetBackup client. ![]()
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