[openstack-dev] [Cinder] A possible solution for HA Active-Active

Mike Perez thingee at gmail.com
Fri Jul 31 17:40:04 UTC 2015

On Fri, Jul 31, 2015 at 8:56 AM, Joshua Harlow <harlowja at outlook.com> wrote:
> ...random thought here, skip as needed... in all honesty orchestration
> solutions like mesos
> (http://mesos.apache.org/assets/img/documentation/architecture3.jpg),
> map-reduce solutions like hadoop, stream processing systems like apache
> storm (...), are already using zookeeper and I'm not saying we should just
> use it cause they are, but the likelihood that they just picked it for no
> reason are imho slim.

I'd really like to see focus cross project. I don't want Ceilometer to
depend on Zoo Keeper, Cinder to depend on etcd, etc. This is not ideal
for an operator to have to deploy, learn and maintain each of these

I think this is difficult when you consider everyone wants options of
their preferred DLM. If we went this route, we should pick one.

Regardless, I want to know if we really need a DLM. Does Ceilometer
really need a DLM? Does Cinder really need a DLM? Can we just use a
hash ring solution where operators don't even have to know or care
about deploying a DLM and running multiple instances of Cinder manager
just works?

Mike Perez

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