Enterprise
Manager makes it easy for you to set up an Oracle-suggested backup strategy
that protects your data and provides efficient recoverability to any point in
the preceding 24 hours, and possibly as far back as 48 hours, depending on when
the last backup was created. The Oracle-suggested strategy uses the incremental
backup and incrementally updated backup features, providing faster
recoverability than is possible when applying database changes from the
archived log files.
To
establish an Oracle-suggested strategy, navigate to the Maintenance page. In
the Backup/Recovery region, select Schedule Backup. The Backup Strategies
section enables you to select from the Oracle-suggested backup and Customized
backup strategies. The Oracle-suggested strategy takes a full database copy as
the first backup. Because it is a whole database backup, you might want to
consider taking this at a period of least activity. After that, an incremental
backup to disk is taken every day. Optionally, a weekly tape backup can be
made, which backs up all recovery-related files.
Because
these backups on disk are retained, you can always perform a full database
recovery or a point-in-time recovery to any time within the past 24 hours, at
the minimum. The recovery time could reach back as far as 48 hours. This is
because just before a backup is taken on a given day, the backup from the beginning
of day n–1 still exists.
