I'm planning on running Ceph Cuttlefish with Qemu/KVM using Qemu's inbuilt RBD support (not kernel RBD). I may go beyond Cuttlefish. What versions of Qemu are recommended for this? Qemu 1.0 is what ships with Ubuntu Precise LTS which the base OS in use, so this would be the best options in many ways. Qemu 1.0 is built with rbd support, and dynamically links correctly to librbd from the Cuttlefish distribution. However, I note things like: http://tracker.ceph.com/issues/3737 http://patchwork.ozlabs.org/patch/232489/ which is the implementation of using asynchronous flushing in Qemu. That's only in 1.4.3 and 1.5 if I use the upstream version. Are there many such things? If not, part of me is tempted to backport a few such issues to Qemu 1.0 rather than risk upgrading to Qemu 1.5. I know there are a few issues with qemu convert, but I can solve those another way. We're using format 2 images, if that's relevant. -- Alex Bligh _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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