I've been facing issues related with file level backups uploading Firebird database files. The thing is: the database files don't change the modification date always, even if there is new data or it has updated it just change this parameter when the established connection is closed or when the DB services got restarted. So, some customer ask me if there is a way to upload the whole dataset everytime the backup plan runs.
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Did i get your question correctly that you’re trying to get a full backup every time for the file level backup?
At the moment our approach is Incremental forever, only the new and modified data is being backed up.
Thanks and happy New Year!