. On Jan 20, 2013, at 1:38 AM, Sage Weil <sage@xxxxxxxxxxx> wrote: > On Sun, 20 Jan 2013, Peter Smith wrote: >> Thanks for the reply, Sage and everyone. >> >> Sage, so I can expect Ceph-rbd works well on Centos 6.3 if I only use >> it as the Cinder volume backend because the librbd in QEMU doesn't >> make use of kernel client, right? > > Then the dependency is on the qemu version. I don't remember that off the > top of my head, or know what version rhel6 ships. Most people deploying > openstack and rbd are using a more modern distro (like ubuntu 12.04). That is fine. What qemu version do u recommend? I can build one myself. Centos is a hard requirement for our IT. Ubuntu was known not very stable before. We are not sure how it is now. > > Josh would know more... > >> Could you explain a bit more about what are the functions of kernel >> client? Will it influence the daily operations, such as listing >> volumes, devices by using ceph commands? > > There is no kernel dependency at all for the radosgw and qemu+rbd use- > cases. Thanks for the clarification. > > sage > > >> >> >> >> >> >> >> On Sun, Jan 20, 2013 at 1:13 AM, Sage Weil <sage@xxxxxxxxxxx> wrote: >>> On Sat, 19 Jan 2013, Dimitri Maziuk wrote: >>>> On 1/19/2013 9:50 AM, Peter Smith wrote: >>>> >>>>> 3. OS recommendation: The OS recommendation page: >>>>> http://ceph.com/docs/master/install/os-recommendations/#bobtail-0-56 >>>>> says CentOS 6.3 has a default kernel with old kernel client. CentOS >>>>> 6.3 is our production environment. >>>> >>>> I was unable to get ceph to run on centos 6.3 following the "5 minute quick >>>> start" document. I did get one machine to "unclean" cluster state using >>>> elrepo's kernel 3.7, but that kernel doesn't boot on most of our boxen >>>> (boot-time oops in pata-acpi). >>>> >>>> It looks to me that unless inktank backports rbd.ko to 2.6.32, centos/sl users >>>> won't be able to test ceph for a couple of years: until centos 7.1 comes out >>>> and we get the chance to reimage our hardware. >>> >>> If you want to use the kernel client(s), that is true: there are no plans >>> to backport the client code to the ancient RHEL kernels. Nothing prevents >>> you from running the server side, though, or the userland clients >>> (ceph-fuse, librbd, qemu/KVM, radosgw, etc.) >>> >>> sage >> -- >> 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 >> >> Send from my iOS device-- 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
