Serge E. Hallyn <serge.hal...@canonical.com> wrote: > Quoting Nikolai K. Bochev (n.boc...@grandstarco.com): >> Now the question is - did the ubuntu team do some testing with this ? > > I don't know about Dustin. I myself haven't really played with the > caching options.
I have, only a bit though. Mostly to make an informed default in the TestDrive wrapper for KVM. I tested and verified this part of the kvm(1) manpage: * http://manpages.ubuntu.com/kvm Some block drivers perform badly with cache=writethrough, most notably, qcow2. If performance is more important than correctness, cache=writeback should be used with qcow2. For TestDrive, "performance" is more important than "correctness" since most TestDrive VMs are just throwaway VMs, and all use qcow2. I have not conducted any deeper analysis, though. Sorry. :-Dustin -- ubuntu-server mailing list ubuntu-server@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-server More info: https://wiki.ubuntu.com/ServerTeam
