> On Mon, Sep 13, 2010 at 11:38 AM, Guy Coates <gmpc@xxxxxxxxxxxx> wrote: > > On 13/09/10 12:16, Mag Gam wrote: > >> Hello, > >> > > > > Hi Mag, > > > > One of the nice ceph features that only work with btrfs as the backing > > filesystem is the sub-directory accounting; > > > > ls -ald on a directory will show the size of all the files contained > > within in, and getfattr -d directory will show the number of files and > > other accounting information. Invaluable for large file-systems! (Didn't see this one come over the list, but just to clarify:) The recursive accounting is a function of the Ceph MDS and will work regardless what what backend file system you're using on the OSDs (extN, btrfs, xfs). The main thing that currently doesn't work properly without btrfs is recovery when snapshots are being used. (It'll work most of the time, but there are corner cases that aren't covered.) This is something we plan to fix. sage > > > > Cheers, > > > > Guy > > > > > > -- > > Dr. Guy Coates, Informatics System Group > > The Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1HH, UK > > Tel: +44 (0)1223 834244 x 6925 > > Fax: +44 (0)1223 496802 > > > > > > -- > > The Wellcome Trust Sanger Institute is operated by Genome Research > > Limited, a charity registered in England with number 1021457 and a > > company registered in England with number 2742969, whose registered > > office is 215 Euston Road, London, NW1 2BE. > > > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > >
