Le 07/02/2017 à 21:36, Kai Krakow a écrit : > [...] > I think I've read that btrfs snapshots do not guarantee single point in > time snapshots - the snapshot may be smeared across a longer period of > time while the kernel is still writing data. So parts of your writes > may still end up in the snapshot after issuing the snapshot command, > instead of in the working copy as expected. I don't think so for three reasons : - it's so far away from admin's expectations that someone would have documented this in "man btrfs-subvolume", - the CoW nature of Btrfs makes this trivial : it only has to keep old versions of data and the corresponding tree for it to work instead of unlinking them, - the backup server I referred to restarted a PostgreSQL system from snapshots about one thousand time now without a single problem while being almost continuously being updated by streaming replication. Lionel -- 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
