This is somewhat confusing. CephFS is a shared filesystem - you mount that on N hosts and they can access the data simultaneously. RBD is a block device, this block device can be accesses from more than 1 host, BUT you need to use a cluster aware filesystem (such as GFS2, OCFS). Both CephFS and RBD use RADOS as a backend, which is responsible for data placement, high-availability and so on. If you explain your scenario more we could suggest some options - do you really need to have the data accessible on more servers, or is a (short) outage acceptable when one server goes down? What type of data do you need to share and how will the data be accessed? Jan > On 28 Jan 2016, at 11:06, Sándor Szombat <szombat.sandor@xxxxxxxxx> wrote: > > Hello all! > > I check the Ceph FS, but it is beta now unfortunatelly. I start to meet with the rdb. It is possible to create an image in a pool, mount it as a block device (for example /dev/rbd0), and format this as HDD, and mount it on 2 host? I tried to make this, and it's work but after mount the /dev/rbd0 on the two host and I tried to put files into these mounted folders it can't refresh automatically between hosts. > So the main question: this will be a possible solution? > (The task: we have 3 main node what can install the other nodes with ansible, and we want to store our rpm's in ceph it is possible. This is necessary because of high avability.) > > Thanks for your help! > > _______________________________________________ > 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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