Informix® uses
logical log files for data recovery and consistency. Backing up the
logical log files provides a means of restoring database servers to
their last committed transactions. If the server becomes corrupted,
the system performs a fast recovery after an unexpected server shutdown,
which frees space for new logical log records. You can restore a database
server to the last server archive. With logical log backups, you can
restore work done between the last archive and the time the database
server was shut down or corrupted. Before backing up logical log files,
you must perform the following steps.
Procedure
- Establish a backup plan, and update it periodically.
Create and test a plan for scheduled backups to ensure that
the plan works and does not affect your current production environment.
Include in the plan scheduled database server archives and logical
log file backups.
- Plan to have users log out of their Rational® Synergy sessions during backups.
When the backup is in progress, users might still be working
in the file system while the database activities are suspended, which
can cause data inconsistencies.
To help avoid data inconsistencies
when the server is restored, ensure that users do not make changes
in the file system while the logical log files are being backed up.