Backing up and restoring databases

You can back up databases to permanent storage (or any POSIX filesystem that allows read/write access) by:

calling qdb_backup() from a client application
passing the -b option to qdbc
using the resource manager interface as follows:
```
echo backup dbname >/dev/qdb/.control
```

These methods are affected by options in the database configuration object.

To restore a database, start qdb with the -R option set to auto. For more information about this option, see the “Database Recovery” section in the QDB Command Line chapter.

You can cancel a database backup in client code by calling qdb_bkcancel(). You can also cancel a backup operation using the QDB resource manager interface:

echo cancel >/dev/qdb/.control