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    Mixed 2.3 and 3.1 cluster

    Join is possible, but, does not work. For example, live migration on 3.1, requires mandatory version 3.1. In mixed status 3.0 - 3.1 live migration fails. And this is just an example Luca
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    Sheepdog: test on infiniband

    I've tested sheepdog, is absolutely fantastic. But... is slow (without cache, tested on 1 gbps eth). The idea... if I use a low cost infiniband card (HP, 2 ports, 140 $), tcp over IB, can I increase performance ? HD storage on 3 nodes make 200 Mbyte/sec in local, in this case (3 nodes on...
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    Qemu guest agent in centos5 or debian6

    Older kernel or older distro ? Debian 6 can use Linux kernel 3.2 from backports.