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<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>
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