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) 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/ >
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