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PowerScale OneFS 9.8.0.0 Web Administration Guide

NDMP backup and recovery overview

OneFS enables you to back up and recover file-system data using the Network Data Management Protocol (NDMP). From a backup server, you can direct backup and recovery processes between a PowerScale cluster and backup devices such as tape devices, media servers, and virtual tape libraries (VTLs).

Some of the NDMP features are described below:

  • NDMP supports two-way and three-way backup models.
  • With certain data management applications, NDMP supports backup restartable extension (BRE). The NDMP BRE allows you to resume a failed backup job from the last checkpoint that was taken before the failure. The failed job is restarted automatically and cannot be scheduled or started manually.
  • You do not have to activate a SnapshotIQ license on the cluster to perform NDMP backups. If you have activated a SnapshotIQ license on the cluster, you can generate a snapshot through the SnapshotIQ tool, and then back up the same snapshot. If you back up a SnapshotIQ snapshot, OneFS does not create another snapshot for the backup.
  • You can back up WORM domains through NDMP.
NOTE:NDMP backups that are created with PowerScale OneFS 9.5.0.0 are compatible only with 9.5.0.0 and later releases: they are not backwards compatible. The data restore path is possible from older OneFS source to a newer version of OneFS only as the target storage.

Example: Restoring content from a backup created with PowerScale OneFS 9.0 to a cluster with PowerScale OneFS 9.5 is supported. However an attempt to restore content that is created from a cluster with OneFS 9.5 to a pre-OneFS 9.5 cluster is not supported.


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