Configuring Multiple Streams for Backups

You can configure multiple data streams per subclient for data protection operations. Using multiple streams, you can back up multiple paths in a subclient concurrently. Because multiple paths are backed up as part of the same job, the total number of running jobs is reduced. Multi-streaming is dependent on the number of available resources (drives) and the type of file server you are using. Configuring multiple streams is useful in the following scenarios:

  • A subclient contains multiple data paths.

  • A subclient is configured to back up the entire file server.

Considerations

  • The actual number of concurrent backup streams employed during a backup job is limited by the number of subclient content paths. The number of available resources will be limited if other subclients are also using the same Storage Policy or a specific content path requires more time for backup.

  • Isilon backups: You can use multiple streams to backup individual content paths to increase the speed of backup operations. For more information see, Isilon Multi-Streaming Backups.

  • NetApp IntelliSnap backups: Subclients with multiple content paths on the same volume will only use a single stream per volume when cataloging the snapshot.

  • NetApp C-mode backups: You can use multiple streams to backup individual content paths to increase the speed of backup operations. For more information see, NetApp C-Mode Multi-Streaming Backups.

Procedure

  1. From the CommCell Browser, go to Client Computers > client > NDMP > backup_set.

  2. In the right pane, right-click the subclient, and then click Properties.

    The Subclient Properties dialog box appears.

  3. On the Advanced Options tab, in the Number of Data Readers box, type or select the number of data streams.

  4. To enable multi-streaming within an individual content path for NDMP NetApp C-mode clients, select the Allow multiple data readers within a content path check box.

  5. On the Storage Device tab, in the Storage Policy list, click a storage policy.

    Note

    The number of streams configured in the storage policy should be equal to or greater than the specified Number of Data Readers.

  6. Click OK.

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