In the manual, file backups have the following defaults:
Full file backup - 30 days
Incremental file backups - 5hr
Maximum incremental file backups - 100
Minimum incremental file backups - 40
My understanding is that in order to be able to reassemble a file backup set, you would need to have every incremental backup since the last full backup, else you would not be capturing changes to files since the last full file backup.
If you went with the defaults, you would potentially have only 40-100 incremental backups however at the end of the 30 days, 144 lots of 5 hours would have past, meaning that URBackup has deleted at least 44 incremental backups.
Would this not mean that if you did a full file restore on day 30, you would be missing about a third of file changes since the last full file backup?
If this is the case, shouldn’t URBackup automatically manage the min/max backups in a way that ensures that all changes are captured at the interval that you have set?
For example, if I set the following:
Full File Backup - 30 days
Incremental file backup - 1 hour
URBackup should keep a single full file backup and 720 incremental file backups which could be reassembled to restore all files as they where only 1 hour ago.
Some clarification and corrections would really be appreciated! I am having trouble with adequate disk space on the backup server and may be simply retaining more backups than required to adequately restore.