Hi Chad, > We are about to look at ceph as a solution for: > - file storage for a RoR web application. we will have front end servers > serving http requests and the ceph cluster would be the online storage > > Our plan is to setup a small test cluster first, do some testing and put it > into production starting with a small cluster in a few months. > > Is this advisable at this time or in the very new future: > - if we wait until the next release to go into production > - we backup snapshots to a hdfs cluster regularly > > the files are important
I would only use it if you can tolerate periodic downtime while you restore from backups. :) That said, it would be great to see some testing, and I'm committed to fixing to bugs as they come up. > we are also going to be running a hadoop cluster on hdfs as mentioned. can > we > 1. situate the ceph cluster on the same hadoop nodes? > 2. situate parts of the ceph cluster on the same physical drives? Yes. The only real requirement here is that you run btrfs, which means you'll need the latest kernel and will have to live with the stability level of btrfs (which is pretty good, but still not production ready). If that's the case, you won't want to backup ceph to that hdfs cluster! > the nodes will be low end nodes and the idea is to keep adding them when > more capacity is needed. > > and lastly, has anyone run hypertable on ceph yet? We are wondering the > performance for data serving from hypertable directly to the web. have > there been performance tests on this or comparisons anywhere out there? Not that I know of. I'd be very interested in hearing how that goes, though! There are some ceph ioctls that would allow hypertable to force one of the file replicas to a specific node (presumably, the node running the RangeServer). It would also be possible to link up hypertable directly with the userspace client library. sage ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensign option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Ceph-devel mailing list Ceph-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ceph-devel
