ZDB Scan Phase

Bacula Enterprise Only

This solution is only available for Bacula Enterprise. For subscription inquiries, please reach out to sales@baculasystems.com.

When BSnapDiff is first enabled for backing up a ZFS file system, a ZDB Scan is activated and a regular Full backup is performed. The log file will report:

bsnapdiff is availble, running a regular full filesystem backup

If the file system was backed up by Bacula prior to installing the plugin, or if any issues are detected with the snapshot history, a regular Incremental backup is performed while the ZDB Scan phase is activated. The log file will report:

bsnapdiff is availble, running a regular incremental filesystem backup

During this step, the live file system is checked for files that are associated with an invalid parent dinode - a known issue in ZFS. The plugin checks for, repairs, and reports these errors during this backup. The log file will report messages similar to:

zdb_fix_missing_dinodes backup relinked 9 files

Once a backup is completed using the ZDB Scan phase, it is no longer required. Incremental Backups with BSnapDiff enabled will continue to check for orphaned files, but with significantly reduced overhead.