Sage, Even with cluster file system, it will still need a fencing mechanism to allow SCSI device shared by multiple host, what kind of SCSI reservation RBD currently support?
Fred Sent from my Samsung Galaxy S3 On Oct 20, 2014 4:42 PM, "Sage Weil" <s...@newdream.net> wrote: > On Mon, 20 Oct 2014, Dianis Dimoglo wrote: > > I installed ceph two nodes, 2 mon 2 osd in xfs, also used the RBD and > > mount the pool on two different ceph host and when I write data through > > one of the hosts at the other I do not see the data, what's wrong? > > Although the RBD disk can be shared, that will only be useful if the file > system you put on top is designed to allow that. The usual suspects > (ext4, xfs, etc.) do not--they assume only a single host is using the disk > at any time. That means that unless you deploy a cluster fs like ocfs2 or > gfs2, you can only use an RBD on a single host at a time. > > sage > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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