Using incremental, multi-section, multiplexing, and parallelism
In general, the biggest concern for DBAs is those long running backup jobs which take hours to complete and they want to bring the backup time down by any means. If you see the same issue and want to improve the time elapsed for your RMAN backup jobs, you can use a few features that are inbuilt to RMAN. The RMAN features that can help greatly are:
Incremental backups
Multi-section backups
Multiplexing
Parallelism
A full backup would definitely take a very long time compared to incremental backups. Because incremental backups only consider the modified blocks to be included in the backup, the time taken for them to complete is far lower than the normal backups. Using a block change tracking file keeps the information of the modified blocks, lets the incremental backup read that information, skips reading the entire data file, and makes the incremental backup even more efficient and time saving.
For large sized files, multi-section...
