[openstack-dev] [oslo][mistral] Saga of process than ack and where can we go from here...

Dmitry Tantsur dtantsur at redhat.com
Thu May 5 10:02:21 UTC 2016

On 05/04/2016 08:21 AM, Mehdi Abaakouk wrote:
> Hi,
>> That said, I agree with Mehdi that *most* RPC calls throughout OpenStack,
>> not being idempotent, should not use process-then-ack.
> That why I think we must not call this RPC. And the new API should be
> clear the expected idempotent of the application callbacks.
>>> Thoughts from folks (mistral and oslo)?
> Also, I was not at the Summit, should I conclude the Tooz+taskflow
> approach (that ensure the idempotent of the application within the
> library API) have not been accepted by mistral folks ?

Taskflow is pretty opinionated about the whole application design. We 
can't use it in ironic-inspector, but we also need process-then-ack 
semantics for our HA work.

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