Thanks Brad, I have looked through OCFS2 and does exactly what I wanted.
On Tue, Jun 28, 2016 at 1:04 PM, Brad Hubbard <bhubb...@redhat.com> wrote: > On Tue, Jun 28, 2016 at 4:17 PM, Ishmael Tsoaela <ishmae...@gmail.com> > wrote: > > Hi, > > > > I am new to Ceph and most of the concepts are new. > > > > image mounted on nodeA, FS is XFS > > > > sudo mkfs.xfs /dev/rbd/data/data_01 > > > > sudo mount /dev/rbd/data/data_01 /mnt > > > > cluster_master@nodeB:~$ mount|grep rbd > > /dev/rbd0 on /mnt type xfs (rw) > > XFS is not a network filesystem. It can not be mounted on more than > one system at any given > time without corrupting it, even if one mountpoint does no writes, teh > log will still be replayed > during the mount and that should be enough for at least one system to > detect the filesystem > is corrupted. > > Cheers, > Brad > > > > > > > Basically I need a way to write on nodeA, mount the same image on nodeB > and > > be able to write on either of the nodes, Data should be repilcated to > both > > but I see on the logs for both osd, data is only stored on one. > > > > > > I am busy looking at CEPHFS > > > > > > thanks for the assistance. > > > > > > > > > > > > > > > > > > > > > > On Tue, Jun 28, 2016 at 1:09 AM, Christian Balzer <ch...@gol.com> wrote: > >> > >> > >> Hello, > >> > >> On Mon, 27 Jun 2016 17:00:42 +0200 Ishmael Tsoaela wrote: > >> > >> > Hi ALL, > >> > > >> > Anyone can help with this issue would be much appreciated. > >> > > >> Your subject line has nothing to do with your "problem". > >> > >> You're alluding to OSD replication problems, obviously assuming that one > >> client would write to OSD A and the other client reading from OSD B. > >> Which is not how Ceph works, but again, that's not your problem. > >> > >> > I have created an image on one client and mounted it on both 2 > client I > >> > have setup. > >> > > >> Details missing, but it's pretty obvious that you created a plain FS > like > >> Ext4 on that image. > >> > >> > When I write data on one client, I cannot access the data on another > >> > client, what could be causing this issue? > >> > > >> This has cropped up here frequently, you're confusing replicated BLOCK > >> storage like RBD or DRBD with shared file systems like NFS of CephFS. > >> > >> EXT4 and other normal FS can't do that and you just corrupted your FS on > >> that image. > >> > >> So either use CephFS or run OCFS2/GFS2 on your shared image and clients. > >> > >> Christian > >> -- > >> Christian Balzer Network/Systems Engineer > >> ch...@gol.com Global OnLine Japan/Rakuten Communications > >> http://www.gol.com/ > > > > > > > > _______________________________________________ > > ceph-users mailing list > > ceph-users@lists.ceph.com > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > > > -- > Cheers, > Brad >
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