[ Returning list to thread. ] On Wed, Jan 22, 2014 at 11:37 PM, Dmitry Lysenko <tavx@xxxxxxxxxx> wrote: > 22.01.2014 13:01, Gregory Farnum пишет: > > >> On Wed, Jan 22, 2014 at 3:23 AM, Dmitry Lysenko <tavx@xxxxxxxxxx> wrote: >> > Good day. >> > >> > Some time ago i change pg_num like this http://www.sebastien-han.fr/blog/2013/03/12/ceph-change-pg-number-on-the-fly/: >> > >> > ceph osd pool create one-new 500 >> > rados cppool one one-new >> >> Unfortunately, this command is not copying snapshots, which are >> required for rbd images. Modern RBD also maintains a small amount of >> extra metadata which I think will be broken by doing this, too. I'm >> afraid you've permanently removed data which you need. :( >> >> For future reference, you should just be incrementing the pg_num like >> he says when you visit the page now. >> -Greg >> Software Engineer #42 @ http://inktank.com | http://ceph.com >> >> > ceph osd pool delete one >> > ceph osd pool rename one-new one >> > >> > Before changes: >> > ceph osd lspools >> > 0 data,1 metadata,2 rbd,5 one, >> > >> > After changes: >> > 0 data,1 metadata,2 rbd,6 one, >> > >> > But after that i got an error: >> > rbd --pool one ls -l >> > 2014-01-22 15:03:49.965040 7f022a7cb760 -1 librbd: error looking up name for pool id 5: (2) No such file or directory >> > 2014-01-22 15:03:49.965100 7f022a7cb760 -1 librbd: error opening parent snapshot: (2) No such file or directory >> > 2014-01-22 15:03:49.982534 7f022a7cb760 -1 librbd: error looking up name for pool id 5: (2) No such file or directory >> > 2014-01-22 15:03:49.982557 7f022a7cb760 -1 librbd: error opening parent snapshot: (2) No such file or directory >> > NAME SIZE PARENT FMT PROT LOCK >> > one-104 20480M 2 >> > one-41 11264M 2 >> > one-86 8192M 2 >> > one-93 10000M 2 >> > one-93@130-0 10000M 2 yes >> > one-95 10000M 2 >> > one-95@142-0 10000M 2 yes >> > one-95-150-0 10000M 2 >> > one-96 10000M 2 >> > >> > rbd --pool one cp one-93-130-0 one-93-130+ >> > 2014-01-22 15:12:41.111368 7fd95d892760 -1 librbd: error looking up name for pool id 5: (2) No such file or directory >> > 2014-01-22 15:12:41.111404 7fd95d892760 -1 librbd: error opening parent snapshot: (2) No such file or directory >> > rbd: error opening image one-93-130-0: (2) No such file or directory >> > >> > and so on... >> > >> > May be snapshots referenced to old pool with id=5? >> > How to fix this? >> > >> > Thank you. > > Good day. > > Data of cloned images are exist (headers and data present). > May i get data from pool by "rados get rbd_data..." > and after concatenate that to working image? Cloned images are stored as: 1) A reference to a snapshot which serves as the golden image. 2) The data blocks which differ from that golden image. You've broken the reference (because it's not in pool id 5 any more), and you've also deleted the snapshots (because they are not copied by the rados cppool command). If you elsewhere have a copy of the golden image, you could reconstruct the clone by manually extracting the different blocks and overlaying them, sure. > p.s. I want to remove second clone of snapshot: > rbd --pool one snap rm one-95@142-0 > but all mons goes to fault (see log and 'objdump -rdS ceph-mon' of one > monitor in attach) Interesting, looks like the monitor isn't error-checking the input enough or something. I created a bug: http://tracker.ceph.com/issues/7210 -Greg Software Engineer #42 @ http://inktank.com | http://ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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