At Sat, 9 Jul 2011 00:44:29 +0200, Giuseppe Civitella wrote: > > Once I've read Morita Kazutaka's answer to my mail I've found the same > blueprint. > I realized that when Diablo will be released something very interesting will > happen in terms of distributed storage support. > > May I ask for a comparison between Sheepdog, Ceph and Glusterfs ? Ceph and GlusterFS are file systems, but Sheepdog provides only block devices to virtual machines. RBD, which is a part of Ceph, provides block devices like Sheepdog, but there are some differences between two: - RBD can be accessed as a Linux block device - RBD seems to scale more than Sheepdog - Sheepdog has a fully symmetric architecture - Sheepdog supports dynamic membership management (zero configuration about the node membership) You can use Sheepdog and RBD from OpenStack, but GlusterFS is not supported yet. Thanks, Kazutaka > > Thanks a lot > Giuseppe > > > > On Friday 08 July 2011 16:34:07 Dan Mihai Dumitriu wrote: > > That is a limitation of Nova, not Sheepdog. The boot from volume > > support is the same for all types of block storage. > > > > The work to make booting from volumes work is ongoing, please see > > https://blueprints.launchpad.net/nova/+spec/boot-from-volume > > > > Cheers, > > Dan > > > > > > On Wed, Jul 6, 2011 at 03:34, MORITA Kazutaka > > > > <morita.kazutaka at lab.ntt.co.jp> wrote: > > > At Mon, 4 Jul 2011 18:38:16 +0200, > > > > > > Giuseppe Civitella wrote: > > >> Hi all, > > >> > > >> IFAIK libvirt and qemu both support the creation of virtual machines > > >> which have boot disk stored on a sheepdog cluster. > > >> I've beek checking openstack's wiki for sheepdog's related information. > > >> I've found a configuration example: > > >> http://docs.openstack.org/cactus/openstack-compute/admin/content/sample- > > >> nova-configuration-files.html and this blueprint page: > > >> http://wiki.openstack.org/SheepdogSupport > > >> > > >> Both pages are just about volumes management. > > >> It seems it's not possible to boot a vm on a nova-compute node while > > >> storing it's disk on a sheepdog cluster: am I wrong? > > > > > > Currently, OpenStack virtual machines cannot boot from Sheepdog > > > volumes. The work is still on going, and will be supported in the > > > next release, Diablo. What you can do with the current version is > > > attaching/detaching Sheepdog volumes to the OpenStack virtual > > > machines. > > > > > > Thanks, > > > > > > Kazutaka > > > -- > > > sheepdog mailing list > > > sheepdog at lists.wpkg.org > > > http://lists.wpkg.org/mailman/listinfo/sheepdog > -- > sheepdog mailing list > sheepdog at lists.wpkg.org > http://lists.wpkg.org/mailman/listinfo/sheepdog |