Oracle Database Discussions

Hi All,

I'm new in administration of Oracle and confused about the concept of backup and recovery.

1. The documentation said the archivelog can be deleted once the Backup has been performed. Is that true? But I want to keep them for 3 days

2. I did an incremental level 0 yesterday and level 1 backup today on the datafiles and archivelog. I found that the data file sizes of both days are quite small and different every day. But for the archivelog backup, the file size is very large and similar every day. What's the proper way to perform incremental level 1 backup on archivelog?

Thanks in advance!