while I was thinking a little about backup schedule and retention periode, I came about the restore and therefor about the wording.
Sure: if I restore a directory from the scratch, I will need all file backups beginning with the last full backup, so this is a real incremental.
But isn´t it right, that if I restore images from the cratch I have to restore the last full backup followed by the last “incremental” backup? So this would be a differential and not a incremental…
During restore all backups, image and file backups, behave like full backups, so you don’t have to care about that at all. The difference is what is transfered during the backups.
An incremental file backup only transfers the files changed since the last backup. A differential file backup would transfer all the files changed since the last full backup. Which would of course be sub-optimal.
[quote=“uroni”]During restore all backups, image and file backups, behave like full backups, so you don’t have to care about that at all. The difference is what is transfered during the backups.[/quote]I don´t fully agree that because for example you are able to set full backups every 30 days, incremental every day and minimum incremental backups to keep less than 30. In case of incremental backups (file) you really need all backups between full and restored session, but with that example settings I would have disabled myself to restore all files to a specific date even if the full backup was older than this date. Wouldn´t I?
No. For all intends and purposes except what gets transfered every file backup behaves like a full backup. You can even delete all full backups and the incrementals will still be complete.
I see that it is confusing – because why would you do a full backup then? Good question. If there is a bug in the way incrementals are done, full file backups give you some kind of backstop. Other reasons do not exist… (So you could set “Max number of full backups” to 1 and “Interval for full file backups” to a ridiculously high number).
How difficult problem be, that the deleted incremental backup was included in the full backup.
It is clear that this will overwrite files in the full backup.
The number of incremental backups would mean only change history files.
(How far to go back in history changed file)
I’m sorry my English is not good.