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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Agree with Thierry.<o:p></o:p></p><p class=MsoNormal>Let’s define requirements.<o:p></o:p></p><p class=MsoNormal>We are trying to solve HA not scale “infinitely” number of cinder instances running.<o:p></o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>Arkady<o:p></o:p></p><p>-----Original Message-----<br>From: Gorka Eguileor [mailto:geguileo@redhat.com] <br>Sent: Monday, August 03, 2015 3:44 AM<br>To: OpenStack Development Mailing List (not for usage questions)<br>Subject: Re: [openstack-dev] [Cinder] A possible solution for HA Active-Active<br><br>On Mon, Aug 03, 2015 at 10:22:42AM +0200, Thierry Carrez wrote:<br>> Flavio Percoco wrote:<br>> > [...]<br>> > So, to summarize, I love the effort behind this. But, as others have <br>> > mentioned, I'd like us to take a step back, run this accross teams <br>> > and come up with an opinonated solution that would work for everyone.<br>> > <br>> > Starting this discussion now would allow us to prepare enough <br>> > material to reach an agreement in Tokyo and work on a single <br>> > solution for Mikata. This sounds like a good topic for a cross-project session.<br>> <br>> +1<br>> <br>> The last thing we want is to rush a solution that would only solve a <br>> particular project use case. Personally I'd like us to pick the <br>> simplest solution that can solve most of the use cases. Each of the <br>> solutions bring something to the table -- Zookeeper is mature, Consul <br>> is featureful, etcd is lean and simple... Let's not dive into the best <br>> solution but clearly define the problem space first.<br>> <br>> --<br>> Thierry Carrez (ttx)<br>> <br><br>I don't see those as different solutions from the point of view of<br>Cinder, they are different implementations to the same solution case,<br>using a DLM to lock resources.<br><br>We keep circling back to the fancy names like moths to a flame, when we<br>are still discussing whether we need or want a DLM for the solution. I<br>think we should stop doing that, we need to decide on the solution from<br>an abstract point of view (like you say, define the problem space) and<br>not get caught up on discussions of which one of those is best. If we<br>end up deciding to use a DLM, which is unlikely, then we can look into<br>available drivers in Tooz and if we are not convinced with the ones we<br>have (Redis, ZooKeeper, etc.) then we discuss which one we should be<br>using instead and just add it to Tooz.<br><br>Cheers,<br>Gorka.<br><br>__________________________________________________________________________<br>OpenStack Development Mailing List (not for usage questions)<br>Unsubscribe: OpenStack-dev-request@lists.openstack.org?subject:unsubscribe<br>http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev<o:p></o:p></p></div></body></html>