What are the methods for recovering from a Db2 database failure?

There are several methods for recovering from DB2 database failures.

1. Restore using database backup: If there is a regular database backup strategy in place, you can use the backup files to restore the database. The DB2 RESTORE command can be used for database recovery.
2. Recovery using transaction logs: If backup files are not available, you can use transaction log files to perform fault recovery. You can use DB2’s ROLLFORWARD command to apply transaction log files and restore the database to its state before the fault occurred.
3. Recovery using log mirroring: If the database has enabled log mirroring, you can restore the database by manipulating the mirrored files.
4. Restoring using a backup database copy: If there is a backup database available, one can copy the data from the backup database to the main database in order to restore the database.

In general, the recovery methods for DB2 database failures primarily depend on backup files, transaction log files, and other backup data sources. It is important to choose the appropriate method for recovery based on the specific situation.