[openstack-dev] [oslo][messaging] configurable ack-then-process (at least/most once) behavior

Davanum Srinivas davanum at gmail.com
Tue Dec 1 11:25:21 UTC 2015


Bogdan,

Which service would use this flag to start with? and how would the
code change to provide "app side is fully responsible for duplicates
handling"?

Thanks,
Dims

On Tue, Dec 1, 2015 at 4:27 AM, Bogdan Dobrelya <bdobrelia at mirantis.com> wrote:
> On 30.11.2015 14:28, Bogdan Dobrelya wrote:
>> Hello.
>> Please let's make this change [0] happen to the Oslo messaging.
>> This is reasonable, straightforward and backwards compatible change. And
>> it is required for OpenStack applications - see [1] - to implement a
>> sane HA. The only thing left is to cover this change by unit tests.
>>
>> [0] https://review.openstack.org/229186
>> [1]
>> http://lists.openstack.org/pipermail/openstack-dev/2015-October/076217.html
>>
>
> Here is related bp [0]. I will submit the spec as well and put there all
> of the concerns Mehdi Abaakouk provided in the aforementioned patch
> review process. I believe the ack-then-process pattern *has* use cases,
> that is why this topic will be raised again and again unless adressed.
>
> [0]
> https://blueprints.launchpad.net/oslo.messaging/+spec/at-least-once-guarantee
>
>
> --
> Best regards,
> Bogdan Dobrelya,
> Irc #bogdando
>
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-- 
Davanum Srinivas :: https://twitter.com/dims



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