<html><head></head><body>As Ravi mentions, in computer science there's a concept known as CAP theory ( <a href="https://en.m.wikipedia.org/wiki/CAP_theorem">https://en.m.wikipedia.org/wiki/CAP_theorem</a> ) that states what Ravi says.<br>
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Nothing is HA if you do it wrong, and there's lots of ways to do HA wrong. Rather than getting emotional and blaming a tool for not meeting your expectation, consider asking for help achieving your goals. You'll learn a lot more and you'll more likely reach your goals.<br><br><div class="gmail_quote">On February 10, 2016 12:15:26 PM PST, Mike Stump <mikestump@comcast.net> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<pre class="k9mail">Could please state directly in the docs that replica isn’t useful to make reliable R/W HA filesystems. There are a ton of web pages that suggest that gluster can be used to make HA filesystems, but that is false.[1] To a normal person replica 2 means that it works when one goes offline. The problem is, if you configure quorums to avoid split brain, because you want a filesystem that works, then when the first replica pair goes offline, you get read-only errors on the filesystem. In the HA world, falling over dead, isn’t what people want. Not configuring a quorum is even worse, as then it isn’t even a reliable filesystem.<br /><br /><br />Also, please state that by default, because of the quorum setting, the filesystem isn’t reliable when replica is used.<br /><br /><br />Personally, I’d like a reliable high performance HA filesystem. I was hoping that gluster could be it.<br /><br /><br />1 - <a
href="https://www.gluster.org/pipermail/gluster-users/2015-July/022843.html">https://www.gluster.org/pipermail/gluster-users/2015-July/022843.html</a><br /><hr /><br />Gluster-users mailing list<br />Gluster-users@gluster.org<br /><a href="http://www.gluster.org/mailman/listinfo/gluster-users">http://www.gluster.org/mailman/listinfo/gluster-users</a><br /></pre></blockquote></div><br>
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