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<p class=MsoNormal><span style='color:#1F497D'>Thanks for the reply Vlad.
Is there any possible way to migrate the mnesia db or do live upgrades without
bringing down a HA RabbitMQ cluster?<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>I’m looking specifically at
the Pacemaker/Corosync/drdb HA RabbitMQ cluster configuration.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>--Steve<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'> Vlad Alexandru Ionescu
[mailto:vlad@rabbitmq.com] <br>
<b>Sent:</b> Wednesday, September 15, 2010 8:32 AM<br>
<b>To:</b> Steve Haneman<br>
<b>Cc:</b> rabbitmq-discuss@lists.rabbitmq.com<br>
<b>Subject:</b> Re: [rabbitmq-discuss] HA and database schema changes<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><br>
Hi Steve,<br>
<br>
There is currently no easy way to migrate the database.<br>
<br>
In general, it is advisable to use the same code which you first used to create
the exchanges, queues etc. on the new version of Rabbit to reconstruct your
setup.<br>
In order to migrate messages, you would have to use the rabbitmq-shovel plugin,
which would consume messages from the old broker and would publish them into
the new one (you must come up with a sensible configuration, depending on you
setup).<br>
<br>
Hope that answers your question.<br>
<br>
Rgds,<br>
Vlad.<br>
<br>
<br>
<br>
On 09/14/2010 09:28 PM, Steve Haneman wrote: <o:p></o:p></p>
<p class=MsoNormal>Hello,<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal>I was looking over the release notes for “Release:
RabbitMQ 2.0.0” and saw the following:<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><a
href="http://lists.rabbitmq.com/pipermail/rabbitmq-announce/attachments/20100825/2c672695/attachment.txt">http://lists.rabbitmq.com/pipermail/rabbitmq-announce/attachments/20100825/2c672695/attachment.txt</a><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'> <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'>Upgrading <br>
========= <br>
The database schema and the format in which persistent messages are <br>
stored have both changed since the last release (1.8.1). When <br>
starting, the RabbitMQ server will detect the existence of an old <br>
database and will move it to a backup location, before creating a <br>
fresh, empty database, and will log a warning. If your RabbitMQ <br>
installation contains important data then we recommend you contact <br>
support@... for assistance with the upgrade.<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal>We are considering deploying a HA RabbitMQ cluster with
Pacemaker and DRBD. HA is very important for us.<o:p></o:p></p>
<p class=MsoNormal>If there is a database schema change in the future,
specifically what is the process for the upgrade and how does it affect HA
during the upgrade?<o:p></o:p></p>
<p class=MsoNormal>Also during the upgrade, how do we maintain durable
exchanges and queues?<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal>Thanks,<o:p></o:p></p>
<p class=MsoNormal> Steve<o:p></o:p></p>
<pre><o:p> </o:p></pre><pre><o:p> </o:p></pre><pre>_______________________________________________<o:p></o:p></pre><pre>rabbitmq-discuss mailing list<o:p></o:p></pre><pre><a
href="mailto:rabbitmq-discuss@lists.rabbitmq.com">rabbitmq-discuss@lists.rabbitmq.com</a><o:p></o:p></pre><pre><a
href="https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss">https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss</a><o:p></o:p></pre><pre> <o:p></o:p></pre></div>
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