> 3) Oracle Specific > Do not use RMAN's Multiplexing in RMAN will combine 4 >Channels together and the backup data then will be unique every time thus >not allowing for de-duping) > Use the File Seq=1 (Then run multiple channels)
I don't see how this would affect de-duplication if your de-dupe product knows what it's doing. Every block coming into the device should be compared to every other block ever seen by the device. So combining multiple files together using Oracle multiplexing shouldn't affect de-dupe. Did you test this, or see it in the docs somewhere? Was this true for multiple de-dupe vendors, or just the one you chose?
