<div>Hi Jake</div>I can confirm exact the same behaviour with gluster 3.3.0 on Ubuntu 12.04. During the self-heal process the VM gets 100% I/O wait and is locked.<div>After the self-heal the root filesystem was read-only which forced me to do a reboot and fsck.</div>
<div><br></div><div>Cheers,</div><div>Christian<br><br><div class="gmail_quote">2012/7/9 Jake Grimmett <span dir="ltr"><<a href="mailto:jog@mrc-lmb.cam.ac.uk" target="_blank">jog@mrc-lmb.cam.ac.uk</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Dear All,<br>
<br>
I have a pair of Scientific Linux 6.2 servers, acting as KVM virtualisation hosts for ~30 VM's. The VM images are stored in a replicated gluster volume shared between the two servers. Live migration works fine, and the sanlock prevents me from (stupidly) starting the same VM on both machines. Each server has 10GB ethernet and a 10 disk RAID5 array.<br>
<br>
If I migrate all the VM's to server #1 and shutdown server #2, all works perfectly with no interruption. When I restart server #2, the VM's freeze while the self-heal process is running - and this healing can take a long time.<br>
<br>
I'm not sure if "Granular Locking" is on. It's listed as a "technology preview" in the Redhat Storage server 2 notes - do I need to do anything to enable it?<br>
<br>
i.e. set "cluster.data-self-heal-<u></u>algorithm" to diff ?<br>
or edit "cluster.self-heal-window-<u></u>size" ?<br>
<br>
any tips from other people doing similar much appreciated!<br>
<br>
Many thanks,<br>
<br>
Jake<br>
<br>
jog <---at---> <a href="http://mrc-lmb.cam.ac.uk" target="_blank">mrc-lmb.cam.ac.uk</a><br>
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</blockquote></div><br></div>