On Thu, Apr 23, 2015 at 1:25 AM, Burkhard Linke <Burkhard.Linke@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > Hi, > > I've noticed that the btrfs file storage is performing some > cleanup/compacting operations during OSD startup. > > Before OSD start: > /dev/sdc1 2.8T 2.4T 390G 87% /var/lib/ceph/osd/ceph-58 > > After OSD start: > /dev/sdc1 2.8T 2.2T 629G 78% /var/lib/ceph/osd/ceph-58 > > OSDs are configured with firefly default settings. > > This "compacting" of the underlying storage happens during the PG loading > phase of the OSD start. > > Is it possible to trigger this compacting without restarting the OSD? This looks to me less like btrfs and more like the OSD "compact_on_mount" style options. Those default to false right now, but maybe it's set to true in your version — you should explore the archives for threads about that. I'm not sure if there's a way to do it online, but at a quick grep it looks to me like there isn't. -Greg _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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