On Sat, Mar 19, 2011 at 11:43 PM, Martin Wilderoth <martin.wilderoth@xxxxxxxxxx> wrote: > I have a small ceph cluster with 4 osd ( 2 disks on 2 hosts). > > I have been adding and removing files from the file system, mounted as ceph on an other host. > > Now I have removed most of the data on the file system, so I only have 300 MB left plus two snapshots. > > The problem is that looking at the disks the are allocating 88G of data > on the ceph filesystem. There are a few possibilities: 1) You've hosted your OSDs on a partition that's shared with the rest of the computer. In that case the reported used space will include whatever else is on the partition, not just the Ceph files. (This can include Ceph debug logs, so even if nothing used to be there but you were logging on that partition that can build up pretty quickly.) 2) You deleted the files quickly and just haven't given enough time for the file deletion to propagate to the OSDs. Because the POSIX filesystem is layered over an object store, this can take some time. 3) Your snapshots contain a lot of files, so nothing (or very little) actually got deleted. Snapshots are pretty cool but they aren't miraculous disk space! Given the uneven distribution of disk space I suspect option #2, but I could be mistaken. :) Let us know! -Greg -- 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
