btrfs send has option -p to compare 2 snapshots and genereate output of diff and if btrfs receive is there it will get the diff. lets say i have done my first backup /b1/s1 is my subvolume and snap1_s1 is first snapshot ran command: btrfse send /b1/snap1_s1 | btrfs receive /backup then I will get my backup /backup/snap1_s1 next I have created 2nd snapshot /b1/snap2_s1 why cannot i do below btrfs send -p /backup/snap1_s1 /b1/snap2_s1 |btrfs receive /backup both sanp1_s1 and snap2_s2 are readonly why there is a restriction of all snapshots should be under same root? can't I get the diff of copied snapshot i.e /backup/snap1_s1 (never changed) to new snapshot /b1/snap2_s1 ?? My case, i may not always keep previous snapshot but i have copied to backup using the snapshot. In this case is there a way to backup only incrementals using backedup snapshot subvolume ? -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
