On Mon, Jan 6, 2020 at 2:51 PM M Ranga Swami Reddy <swamireddy@xxxxxxxxx> wrote: > > Thank you. > Can you please share a simple example here? > > Thanks > Swami > > On Mon, Jan 6, 2020 at 4:02 PM <ceph@xxxxxxxxxxxxxx> wrote: >> >> Hi, >> >> rbd are thin provisionned, you need to trim on the upper level, either >> via the fstrim command, or the discard option (on Linux) >> >> Unless you trim, the rbd layer does not know that data has been removed >> and are thus no longer needed >> >> >> >> On 1/6/20 10:30 AM, M Ranga Swami Reddy wrote: >> > Hello, >> > I ran the "rbd du <pool>/image" command. Its shows increasing, when I add >> > data to the image. That looks good. But when I removed data from the image, >> > its not showing the decreasing the size. >> > >> > Is this expected with "rbd du" or its not implemented? >> > >> > NOTE: Expected behavior is the same as " Linux du command" >> > >> > Thanks >> > Swami Literally just "sudo fstrim <mount point>". Another alternative is to mount with "-o discard", but that can negatively affect performance. I wrote up a detailed explanation of what is reported by "rbd du" in another thread: https://www.mail-archive.com/ceph-users@xxxxxxxxxxxxxx/msg57186.html Thanks, Ilya _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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