<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hello,<div>I've read the documentation about Openstack HA (<a href="http://docs.openstack.org/high-availability-guide/content/index.html">http://docs.openstack.org/high-availability-guide/content/index.html</a>) and I successfully implemented the active/passive model (with corosync/pacemaker) for the two services Keystone and Glance (MySQL HA is based on Percona-XtraDB multi-master).</div><div><br></div><div>I'd like to know from the experts, which one is the best (and possibly why) model for HA, between active/passive and active/active, basing on their usage experience (that is for sure longer than mine).</div><div><br></div><div>thanks,</div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>Alvise</div></body></html>