launchpad-dev team mailing list archive

[Robert Collins <robertc@xxxxxxxxxxxxxxxxx>]

On Thu, Jun 16, 2011 at 9:35 AM, Elliot Murphy <elliot@xxxxxxxxxxxxx> wrote:
> On Wed, Jun 15, 2011 at 5:07 PM, Francis J. Lacoste
> <francis.lacoste@xxxxxxxxxxxxx> wrote:
>> Elliot suggested today that the Erlang OTP isn't really meant to start
>> multiple RabbitMQ instance on the same box. And gave the same suggestion
>> than Stuart about how to multiplex test runs: use a variable queue prefix.
>
> Whether or not you run multiple rabbits (or couches, or ejabberds, or
> riaks), the Erlang VM itself has a singleton in the portmapper daemon
> (epmd) which is started by the first erlang application that runs on
> the system. I don't think there is any problem running multiple
> instances of an Erlang application such as RabbitMQ on the same box,
> but using branch nick as a queue prefix seemed to provide a sufficient
> level of isolation when I was working on U1.

We're working on aggressive parallelisation of tests; much of the test
suite is already safe \o/. We might be able to do what you suggest,
but I think running a clean queue up with [as complete as we can get]
isolation is much more robust - we don't need to worry about someone
running the tests on a prod server (!eep), whether rabbit is already
running (devs don't like daemons always running that they aren't
using), whether the local rabbit conf is sane (e.g. usercodes etc).

-Rob