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> They designed it to look like a differential backup model, but it's not. The quote you pasted makes it sound like a reverse-differential incremental backup,
by pengaru 3y ago
> They designed it to look like a differential backup model, but it's not.
The quote you pasted makes it sound like a reverse-differential incremental backup, like rdiff-backup implements (poorly). The most recent backup is a snapshot of the tree, restore points having changes are diffs applied cumulatively in reverse chronological order atop the current snapshot. You can simply toss out restore points starting from the tail older than the retention policy.
How is that not a differential backup model?
- still-old 3y agoIn case anyone comes back to this, it's because any snapshot who's retention date is out of the retention period can get removed. When the original item is out of the retention period it can also get removed. There is no cumulation of diffs, its just diffs from the original object. You might notice that the quoted text of my original post has also been changed on the link.