A couple of years ago I asked a question on the Unix and Linux Stack Exchange about the limit on the number of BTRFS snapshots: https://unix.stackexchange.com/q/140360/22724
Basically, I want to use something like snapper to take time based snapshots so that I can browse old versions of my data. This would be in addition to my current off site backup since a drive failure would wipe out the data and the snapshots. Is there a limit to the number of snapshots I can take and store? If I have a million snapshots (e.g., a snapshot every minute for two years) would that cause havoc, assuming I have enough disk space for the data, the changed data, and the meta data? The answers there provided a link to the wiki: https://btrfs.wiki.kernel.org/index.php/Btrfs_design#Snapshots_and_Subvolumes that says: "snapshots are writable, and they can be snapshotted again any number of times." While I don't doubt that that is technically true, another user suggested that the practical limit is around 100 snapshots. While I am not convinced that having minute-by-minute versions of my data for two years is helpful (how the hell is anyone going to find the exact minute they are looking for), if there is no cost then I figure why not. I guess I am asking is what is the story and where is it documented. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
