On Mon, Jul 12, 2010 at 11:59 AM, Roland Rabben <roland@xxxxxxxx> wrote: > Have there been any work to get CEPH working with two datacenters? > > I would like to have two copies of a file at site 1 and a third copy > at site two. > And would you be able to continue running with one of the sites down? > > Best regards > > Roland Rabben We've tossed around a few ideas for this but there hasn't been any serious work on making it happen. Ceph very much assumes a fast network between all the OSDs and any work on supporting multi-site installations would require significant updates to the basic algorithms. That said, as Brian discusses it will work, but expect writes to proceed at about the speed of your datacenter interconnect. And there's not any sort of transparent mapping between a file being created in one datacenter and it having a master there. At present, the best options I know of for multi-site filesystems are something like XtreemFS or an AndrewFS derivative -- they won't necessarily satisfy your requirements but they are standard filesystems designed for multi-site support, unlike any others I'm aware of. -Greg -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
