I'm not sure if your explanation of "Combine Streams" is correct based on my reading of Books Online. Can someone from CommVault confirm? Here is an example:
- Storage Policy with 12 streams
- Primary copy goes to MagLib (using all streams, no multiplexing)
- Secondary copy goes to tape library which has 2 tape drives
- The aux copy operation is configured to "allow maximum number of streams"
Example with combine streams but no multiplexing: If the storage policy is configured with 12 streams and you combine the streams down to 2 for the aux copy, the first 2 streams will be copied simultaneously to tape #1 and tape #2. When done, the next 2 streams will be copied simultaneously to tape #1 and tape #2, and so on until all 12 streams have been copied.
Example with combine streams and multiplexing: If the storage policy is configured with 12 streams and you combine the streams down to 2 with a multiplexing factor of 3 for the aux copy, the first 3 streams will be copied to tape #1 and the next 3 streams will be copied to tape #2, all occurring simultaneously (6 simultaneous streams copying). When done, the next 6 streams will be copied simultaneously (3 to tape #1 and 3 to tape #2).
Books Online example (see the graphics):
Can someone confirm that the above examples are correct?