russell@... [firebird-support] skrev:

  We have a large database that runs a full nbackup every night and an hourly incremental backup. Is the full backup meant to clear the delta file? this doesn't seem to get any smaller.

Also if I restore a gbak backup, what should I do with the delta file?

If you have an active delta file, you have the database in nbackup locked state, either because an nbackup operation terminated abnormally, or you manually locked the database and neglected to unlock it. The delta file is always merged into the live database immediately upon unlock.

On restore, there should be no delta file involved at all. There can be multiple nabckups, one for each level you've backed up, but that's a different thing.

Regards,
Kjell