On Mon, 8 Dec 2014, Smart Weblications GmbH - Florian Wiessner wrote: > Hi Nigel, > > Am 08.12.2014 15:30, schrieb Cook, Nigel: > > Folks, > > > > Can CEPH support 2 clients simultaneously accessing a single volume - for > > example a database cluster - and honor read and write order of blocks > > across the multiple clients? > > > > Yes, we use ocfs2 ontop of rbd, gfs2 should also work...
You do need to disable client-side rbd caching, though (on librbd). The librbd cache is crash-safe but not coherent across clients, and clustered file systems expect coherency (caches in a SAN are at the disk or shared controller, not the client). sage -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
