-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, I came across this when I tried to build a backup server. Was there any change on this in the meantime? Thanks, Andreas On 02.08.2010 17:25, K. Richard Pixley wrote: > How would you determine whether to remove another snapshot or to > wait for previously removed space to be digested? > > If you simply remove snapshots then you'll end up removing all if > your snapshots and df will still say you don't have enough space. > Btdt. What I'm doing right now is removing a snapshot and > immediately sleeping for 60 seconds in hopes that it will be > digested in that time. Judicious use of df and log lines tell me > that some of the space is digested in that time but I have no way, > (that I know of), to determine whether all of it has been. > > --rich > > On Aug 2, 2010, at 4:35, Leonidas Spyropoulos <artafinde@xxxxxxxxx> > wrote: > >> I think a cron job checking the output of df could do that. The >> shell script will check if there is enough space to create a >> snapshot otherwise remove a snapshot. >> >> How about that? >> >> On Sun, Aug 1, 2010 at 10:11 PM, K. Richard Pixley >> <rich@xxxxxxxx> wrote: >>> I have an application where I want to snapshot, then do >>> something, and based on the result, snapshot either the result >>> or the previous state and then repeat. >>> >>> So far, so good. But eventually my disk fills and I want to >>> remove the oldest snapshots, as many as I need to in order to >>> make room enough for the next cycle. >>> >>> I notice that when I remove old snapshots and delete old >>> directories, the free space on my disk, (according to df), >>> doesn't rise immediately. But instead, I see an active >>> btrfs_cleaner for a while and my free space rises while it >>> runs. I'm presuming that the removed files and snapshots >>> aren't fully reclaimed immediately but rather wait for >>> something akin to a garbage collection much the way modern >>> berkeley file systems do. >>> >>> How can I either: >>> >>> a) wait for the cleaner to digest the free space b) determine >>> that the cleaner has digested all available free space for >>> now, (if not I can sleep for a while) c) synchronously force >>> the cleaner to digest available free space d) something else I >>> haven't thought of yet >>> >>> Basically, I want to check to see if there's enough space >>> available. If not, I want to remove some things, (including at >>> least one snapshot), wait for the cleaner to digest, and then >>> start over with the checking to see if there's enough space >>> available and loop until I've removed enough things that there >>> is enough space available. How can I do that on a btrfs file >>> system? >>> >>> --rich -- 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 >>> >> >> >> >> -- Caution: breathing may be hazardous to your health. -- 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 > -- 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 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQIcBAEBAgAGBQJNdeqeAAoJEJIcBJ3+Xkgiba8P/jb1a5K5cNuyrQTH9G3fM9X6 d1a249qdKTgr7AJkuNPQzu3xjvBJeKtFraHfMDBDQTRPmysqnUvMQmHz+dp9NmMe mqStwhKLxxmus5B3IfGClztbhTPmkVJPVykFwcga9zYvNK3jrC+D6Y85IjLFGRBx BCHaZIwzlDtcsDf38+/6zd7pHUtN5UR64mlvyyMQVOl+KEcAyNmDNwgvVDG3BhJK wswF3GE1H0G69jkJb0dOLfLzdLvNyxjdLHYVGMx7GMnEMuYIEgJZsVkT1Anqmql8 gcKjE4kvyC9zz93c6gdJOyO/RVF7dcHP4uQY7FvM9kp+ubkeA08jZcctqz+B2yR8 fpomkeogg/7AUb2my4bpmqEULpSf6PgcKUshZFFAJQBmDxbfyiIDIo2oExbnN+qq m+Kmg7CBwMTtVNUUen+Cdl3y7oleQ8d8XzzW+hSBq3KQQfGowh1bpp12FKbwbgDx h4WvGbLF1tLXedP2puCYR6Dg0Th/WWwxBytKZjdyVSWX4XaJUePw/CLfvtNSpAt4 GbCiltIa8LSnJvlYZabwJhTtcEoeUl+Xu/03pZbiaDnFP3kMDqUBm8RMHwnpkmmo z9tr5mBZFXYb7x2T2Idk5Oh7Ii53Q3XW0bgKf7mkxVvSb9TM+t/vnOX4mLBoVMun qJoGA8SiN72k13Ki8F1H =jxH9 -----END PGP SIGNATURE----- -- 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
