How to get better backup throughput for RMAN backups to NetBackup?
We are using the RMAN NBU agent to backup Oracle DBs. Data servers are RHEL, as are the media servers, using NB 7.1 to backup to Data Domain via OST. We have capped the number of streams for the RMAN backups at 8, however, during some benchmarking, it appears the DB server can handle more streams, and hence get better backup thoughput. The problem is, we need to cap the streams since we have a limited number on the DD side to accommodate all of our backup jobs. So, is there anything I can tune (either on the RMAN side, or NB side) to send more data over the streams?
Our disk buffer size is set to 262144, and the number of buffers is 64 if that matters.