Whatever the default is with cloud-agent for kvm. I'm running centos 6.3 + some level of updates for most packages.
I'm still running cloudstack 3.0.2 fwiw. On Sat, Feb 16, 2013 at 9:36 AM, John Kinsella <j...@stratosec.co> wrote: > Bryan - are you running the KVM disks with writethrough or writeback > caching? From my exp, I had to switch to writethrough for gluster to work, > and that resulted in a 4x performance hit for a VM to write to the gluster > store vs writing to gluster directly on the host... > > John > > On Feb 7, 2013, at 1:28 PM, Bryan Whitehead <dri...@megahappy.net> wrote: > > > I'm currently using glusterfs as a SharedMountPoint with great success. > > I've had server failures and HA smoothly powered up VM's that got hit > > without a hitch. (Each VM host has about ~4TB contributing to a volume > with > > replica=2). I've also been able to migrate VM's around for maintenance on > > specific hosts. > > > > NOTE: I have an infinband/IPoIB interconnect so glusterfs has all the IO > it > > needs. I easily can push 130MB/sec write speeds inside a VM with > kvm/qcow2 > > backed setup. > > > > > > On Wed, Feb 6, 2013 at 12:55 PM, Nux! <n...@li.nux.ro> wrote: > > > >> On 06.02.2013 19:55, Chris Sears wrote: > >> > >>> > >>> I'm not sure anyone could give you a "recommended" option for primary > >>> storage without knowing more about your requirements and environment, > >>> but NFS seems to be fairly common for production usage. For KVM, your > >>> storage options are NFS, RDB, CLVM, or SharedMountPoint (which could > >>> be any shared file system, eg GFS). > >>> > >> > >> Thanks, CLVM looks really neat and I imagine the snapshotting is also > >> superior to what we can see today with kvm+qcow2. I guess I could also > use > >> Glusterfs as SharedMountPoint. > >> > >> > >> > >>> Yes, CS can resize volumes, but it doesn't do anything inside the > >>> guest to resize the local filesystem/partitions. > >>> > >> > >> That's fair enough. > >> > >> > >> > >>> If the requested resize needs more resources than the current physical > >>>> host > >>>> can provide, can CS (live) migrate the VM to another one? > >>>> > >>> > >>> I'm not aware of any such automatic migration feature. Most of the > >>> primary storage options would expose the same shares/LUNs to all the > >>> hosts in a cluster, so I'm not sure how often this would come up. > >>> > >> > >> In my case the local storage is significantly faster than anything > >> "shared" I could come up with so this feature is quite appealing. The > other > >> competition's stack can do this and I wondered if cloudstack can also do > >> it. But CLVM might be a decent compromise, remains to be seen. > >> > >> Thanks a lot! > >> > >> > >> Lucian > >> > >> > >> -- > >> Sent from the Delta quadrant using Borg technology! > >> > >> Nux! > >> www.nux.ro > >> > > Stratosec - Secure Infrastructure as a Service > o: 415.315.9385 > @johnlkinsella > >
