We recommend Ceph RGW and Ceph RBD in production but CephFS is in tech preview mode, meaning we only recommend it for specific use-cases. You could use with Openstack but we wouldn't recommend unless it is just a test environment.
As to the specific reasons for your error, I can't provide any assistance though it would seem to be an Openstack error rather than a Ceph one (as it is coming from the Glance API service) so I would start your debug there. RBD is better suited for storing images in Glance as the Copy-on-Write will give you more efficient boot speeds and space utilization. Neil On Thu, Mar 21, 2013 at 6:35 PM, Li, Chen <chen...@intel.com> wrote: > Thanks for the explanation. > > So, the conclusion is : RGW, RBD and Ceph FS are chunks objects, we can get > way good because we intensively use the entire cluster. > > But my question is still not be answered. > > Why you would say " object storage has been the preferred mechanism of late > in Openstack, but RBD makes more sense due to the copy-on-write facility. > Either way, either the Ceph object gateway or Ceph RBD makes more sense than > CephFS currently " > > Thanks. > -chen > > > -----Original Message----- > From: yehud...@gmail.com [mailto:yehud...@gmail.com] On Behalf Of Yehuda Sadeh > Sent: Thursday, March 21, 2013 9:52 PM > To: Sebastien Han > Cc: Li, Chen; ceph-users@lists.ceph.com > Subject: Re: [ceph-users] using Ceph FS as OpenStack Glance's backend > > On Thu, Mar 21, 2013 at 2:12 AM, Sebastien Han <sebastien....@enovance.com> > wrote: >> >> Hi, >> >> Storing the image as an object with RADOS or RGW will result as a single big >> object stored somewhere in Ceph. However with RBD the image is spread across >> thousands of objects across the entire cluster. At the end, you get way more >> performance by using RBD since you intensively use the entire cluster, with >> the object solution you only request one big object from a single machine so >> you get less performance. >> > > It used to work like this, but since bobtail it's not true anymore. > RGW chunks objects. > > Yehuda _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
