<div dir="ltr"><div><div><div>Hi,<br><br></div>*IF* your seeing crashes in glusterd, Atin sent out an workaround that needs to be applied to 3.7.x to avoid the issue (introduced with epoll)<br><br></div>add <br># for epoll issue glusterd crash fix<br> option ping-timeout 0<br> option event-threads 1<br><br></div>to your glusterd.vol files (/etc/glusterfs/glusterd.vol)<br><br><br><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Oct 13, 2015 at 2:09 PM, Lindsay Mathieson <span dir="ltr"><<a href="mailto:lindsay.mathieson@gmail.com" target="_blank">lindsay.mathieson@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote"><span class="">On 13 October 2015 at 07:54, Ben Turner <span dir="ltr"><<a href="mailto:bturner@redhat.com" target="_blank">bturner@redhat.com</a>></span> wrote:<br></span><span class=""><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="overflow:hidden">Random IO has vastly improved with MT <span>epoll</span> introduced in 3.7, try a test on 3.7 with server and client event threads set to 4. If you want to confirm this before you upgrade run top -H during your testing and look for a hot thread(single thread / CPU pegged at 100%). If you see this during your runs on 3.6 then the MT <span>epoll</span> implementation in 3.7 will def help you out.<br>
</div></blockquote></span></div><br><br></div><div class="gmail_extra">Not 100%, but it gets up to 90% <br><br></div><div class="gmail_extra">Oddly, the feature list seems to show it as being done in 3.6 (<a href="http://www.gluster.org/community/documentation/index.php/Features/Feature_Smallfile_Perf#multi-thread-epoll" target="_blank">http://www.gluster.org/community/documentation/index.php/Features/Feature_Smallfile_Perf#multi-thread-epoll</a>)<br><br></div><div class="gmail_extra">Seems to be causing 3.7.4 to crash regularly at the moment to :(<span class="HOEnZb"><font color="#888888"><br></font></span></div><span class="HOEnZb"><font color="#888888"><div class="gmail_extra"><br clear="all"><br>-- <br><div>Lindsay</div>
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