I've backported the modern (qemu 1.5) rbd driver to qemu 1.0 (for anyone interested). This is designed for people who are conservative in hypervisor version, but like more bleeding edge storage. The main thing this adds is asynchronous flush to rbd, plus automatic control of rbd caching behaviour. I have NOT backported the extended configuration bits. I've used runtime testing through weak binding to detect the version of librd in use, so it's possible to compile against a standard Precise librbd, then run with a more modern one and take advantage of async flush. It works the other way around too. Note the original implementation of this posted to the qemu list (but not taken) did not quite work. The backport in qemu repository format can be found at https://github.com/flexiant/qemu/commits/v1.0-rbd-add-async-flush (note the branch is v1.0-rbd-add-async-flush). I've also backported this to the Ubuntu Precise packaging of qemu-kvm, (again note the branch is v1.0-rbd-add-async-flush) at https://github.com/flexiant/qemu-kvm-1.0-noroms/tree/v1.0-rbd-add-async-flush THESE PATCHES ARE VERY LIGHTLY TESTED. USE AT YOUR OWN RISK. -- Alex Bligh _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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