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Combining Source Data Streams

When the secondary copy has fewer device streams than the primary copy, you can use the combine streams from the primary copy while the copy operation is performed. If you enable this option, the secondary copy of the data uses less media than the media required for the backup data. This improves media usage because the media storage is optimized. Media recycling is also more efficient, because data aging is more effective.

Note: If you are performing a restore operation from a secondary copy that has the Combined Stream option enabled, the restored data is temporarily staged at the Job Results folder before restoring it to a SQL Server. You can change the location of the staging folder by changing the value of additional setting sStageFolderAuxCopyRestore.

Procedure

  1. From the CommCell Browser, expand Policies > Storage Policies > storage_policy.
  2. Right-click the appropriate storage policy copy, and then click Properties.
  3. In the Copy Properties dialog box, click the Media tab, select the Combine source data streams to check box, and then specify the number of streams.

    Notes:

    • The DB2, DB2 MultiNode and Sybase agents use same number of streams for restore operation that are used during backup even if Combined Streams option is configured on the storage policy copy.
    • If you are performing a restore operation from a secondary copy that has the Combined Source Data Stream option enabled:
  4. Click OK.