- Hot Backup for embedded RHN database
- ************************************
- Matthew Booth <mbooth@redhat.com> 22/09/2006
- Hot backup comprises 4 files:
- * prep.sh
- A script to prepare the embedded RHN database for hot backups.
- * hot-backup.sh
- A backup script which will perform both full and incremental backups.
- * RESTORE.txt
- A procedure for restoring the database from the backups
- * README.txt
- This file.
- Using hot backups
- ***********************
- The hot backup script requires that:
- * The database is in archive log mode
- * The rman retention policy has been defined
- The prep script performs both of these tasks. Note that it only ever needs
- to be run once, and that the database must be stopped before running it. It
- is, however, safe to re-run this script.
- Backups are performed by running hot-backup.sh. It takes 1 argument:
- hot-backup.sh (full|incremental)
- full will perform a full backup of the entire database. incremental will
- store only database blocks which have changed since the last full backup.
- The script will also automatically clean up if any of its data files where
- deleted on disk, delete old data and verify that the backup succeeded.
- NB: RMAN is configured to keep 2 full backups: the current and the one
- immediately before it. You should never delete backup files manually as
- they are tracked by oracle.
- hot-backup.sh writes its logs to /var/log/rhn/db_backup.log. It will only
- output anything on an error, and this will be sent to stderr.
- hot-backup.sh should be configured to run automatically from cron. The
- following is an example crontab:
- # Full backup on Sunday
- 0 19 * * 0 root /rhnsat/backup/scripts/hot-backup.sh full
- # Incremental backups on other days
- 0 19 * * 1-6 root /rhnsat/backup/scripts/hot-backup.sh incremental
- NB. If your backups are failing, this will be reported by hot-backup.sh.
- You must ensure that MAILTO for your crontab is set to a real, monitored
- address, otherwise you will not receive any indication of failing backups.
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