How to restore a database in DB2 using log files?
To recover the database from log files, follow the steps below:
- Ensure that the database is in a stopped state.
- Locate the backup files of the database along with their corresponding log files. Backup files are typically files with extensions .dmp, .db2, or .dbf, while log files are usually files with extensions .log or .lf.
- Check the integrity of the backup files using the db2dart command. For example, execute the following command:
- Run the db2dart tool on the specified database to validate and check all objects.
- “
” is the name of the database to be restored. - Restore the backup file using the db2 restore command. For example, execute the following command:
- Restore the database
from the backup directory created at into the new database directory with the log files directed to the log directory . is the name of the database to be restored, is the directory where the backup file is located, is the timestamp of the backup file, is the directory of the restored database, and is the directory where the log files are located. - Use the db2 rollforward command to restore the database to a specific log file. For example, run the following command:
- Recover the database
using the log files up to the end and then finalize the overflow log path to . - In this case,
is the name of the database to be restored, and is the directory where the log files are located. - Start the database. Execute the following command:
- Start DB2.
- Check if the database has been successfully restored. Run the following command:
- Establish a connection to the specified database and then display a list of tables.
- If the connection to the database is successful and the tables are listed, it indicates a successful recovery.
Please be aware that restoring a database requires careful operation. It is recommended to first practice in a test environment and ensure a full backup before proceeding with the operation.
