Ok thanks for the advice. But since the kernel client is not compatible with format 2 images, I can't use it. I will look at LVM about PV in read-only. Thanks again. Le mardi 16 avril 2013 à 06:38 +0200, Wolfgang Hennerbichler a écrit : > I am not entirely sure about LVM, but snapshots are read-only by nature. > Maybe LVM expects a writeable PV. > Use format 2 images and create snapshot childs, and all should be good. > > On 04/15/2013 04:48 PM, Olivier Bonvalet wrote: > > Hi, > > > > I'm trying to map a RBD snapshot, which contains an LVM PV. > > > > I can do the «map» : > > rbd map hdd3copies/jason@20130415-065314 --id alg > > > > Then pvscan works : > > pvscan | grep rbd > > PV /dev/rbd58 VG vg-jason lvm2 [19,94 GiB / 1,44 GiB free] > > > > But enabling LV doesn't work : > > # vgchange -ay vg-jason > > device-mapper: reload ioctl failed: Argument invalide > > Internal error: Maps lock 13746176 < unlock 13889536 > > device-mapper: reload ioctl failed: Argument invalide > > device-mapper: reload ioctl failed: Argument invalide > > device-mapper: reload ioctl failed: Argument invalide > > device-mapper: reload ioctl failed: Argument invalide > > device-mapper: reload ioctl failed: Argument invalide > > device-mapper: reload ioctl failed: Argument invalide > > 7 logical volume(s) in volume group "vg-jason" now active > > > > # blockdev --getsize64 /dev/mapper/vg--jason-* > > 0 > > 0 > > 0 > > 0 > > 0 > > 0 > > 0 > > > > Is it a problem from LVM, or I should not use snapshots like that ? > > > > > > _______________________________________________ > > ceph-users mailing list > > ceph-users@xxxxxxxxxxxxxx > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > > -- > DI (FH) Wolfgang Hennerbichler > Software Development > Unit Advanced Computing Technologies > RISC Software GmbH > A company of the Johannes Kepler University Linz > > IT-Center > Softwarepark 35 > 4232 Hagenberg > Austria > > Phone: +43 7236 3343 245 > Fax: +43 7236 3343 250 > wolfgang.hennerbichler@xxxxxxxxxxxxxxxx > http://www.risc-software.at > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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