[openstack-dev] [stacktach] [oslo] stachtach -> kombu -> pika ??

Sandy Walsh sandy.walsh at RACKSPACE.COM
Mon Mar 16 13:58:20 UTC 2015

>From: Sean Dague <sean at dague.net>
>Sent: Thursday, March 12, 2015 9:09 AM
>To: openstack-dev at lists.openstack.org
>Subject: Re: [openstack-dev] [stacktach] [oslo] stachtach -> kombu -> pika ??
>On 03/10/2015 12:56 PM, Joshua Harlow wrote:
>> I saw the following on
>> https://etherpad.openstack.org/p/PHL-ops-rabbit-queue and was wondering
>> if there was more explanation of why?
>> The StackTach team is switching from Kombu to Pika (at the
>> recommendation of core rabbitmq devs). Hopefully oslo-messaging will do
>> the same.
>> I'm wondering why/what?
>> Pika seems to be less supported, has less support for things other than
>> rabbitmq, and seems less developed (it lacks python 3.3 support
>> apparently).
>So, something that came up was the supporting anything other MQ system
>than Rabbit seemed irrelevant to the operator community. Rabbit is bad,
>all others are demonstrably worse. Anything that makes the Rabbit path
>better is good, anything that could regress the Rabbit path for the sake
>of any of the other backends is bad (and also not useful to deployers).

True, and supporting Pika doesn't have to mean dumping Kombu. It could just 
be a new driver. If Pika gives better stability or performance to the most 
popular OpenStack MQ perhaps it's something to consider?

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