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. The configuration to use the combine streams is effective only for the new copy operations and not applicable for any partially completed operations.
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
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From the CommCell Browser, expand Policies > Storage Policies > storage_policy.
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Right-click the appropriate storage policy copy, and then click Properties.
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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:
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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.
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If you are performing a restore operation from a secondary copy that has the Combined Source Data Stream option enabled:
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For SQL Server and Sybase agents, the restored data is temporarily staged at the Job Results folder before restoring it to SQL Server or Sybase Server. You can change the location of the staging folder by changing the value of additional setting sStageFolderAuxCopyRestore. For instructions, see Add or Modify an Additional Settings.
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For DB2 and DPF agents, perform app free restore. For instructions, see Restoring to Disk (App Free Restore).
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Click OK.