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Boden,

Are you thinking of implementing something which would perform exponentially backed off calls to some arbitrary function till that method returns with something other than a timeout?

I think that would be very versatile, and useful in a wide variety of places.

Thanks,

-amrith

> -----Original Message-----
> From: Davanum Srinivas [mailto:davanum at gmail.com]
> Sent: Wednesday, April 20, 2016 4:45 PM
> To: OpenStack Development Mailing List (not for usage questions)
> <openstack-dev at lists.openstack.org>
> Subject: Re: [openstack-dev] [neutron][nova][oslo] Common backoff &
> timeout utils
> 
> Sounds good to me Boden.
> 
> -- Dims
> 
> On Wed, Apr 20, 2016 at 4:10 PM, Boden Russell <bodenvmw at gmail.com> wrote:
> > Today there are a number of places in nova, neutron and perhaps
> > elsewhere that employ backoff + timeout strategies (see [1] - [4]).
> > While we are working towards a unified approach in neutron for RPC
> > [5], it appears such logic could benefit the greater community as a
> > reusable oslo implementation.
> >
> > IMHO such an oslo implementation could:
> > - Enable backoff/timeout irrespective of client/transport. This would
> > allow the utils to be used with various clients (HTTP, AMQP RPC, etc.).
> > - Support namespacing as inspired by the existing neutron patch [5].
> > - In the future, perhaps, allow multiple (pluggable) backoff
> > strategies to be used (e.g. configurable backoff).
> >
> > Anyone adverse to me crafting an initial oslo patch to kick-off the
> > details on this one?
> >
> >
> > Thanks
> >
> >
> > [1]
> > https://github.com/openstack/nova/blob/master/nova/conductor/api.py#L1
> > 62
> > [2]
> > https://github.com/openstack/nova/blob/3cdaa30566c17a2add5d9163a0693c9
> > 7dc1d065b/nova/scheduler/utils.py#L356
> > [3]
> > https://github.com/openstack/neutron/blob/dd4f1253c951d78a5b497680dfb3
> > 1317ba469a58/neutron/agent/l3/agent.py#L224
> > [4]
> > https://github.com/openstack/neutron/blob/42c6f05f2904cd4c01bcd3f79b19
> > 66489f5ad3c1/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_dvr_neu
> > tron_agent.py#L189 [5] https://review.openstack.org/#/c/280595/
> >
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> 
> 
> --
> Davanum Srinivas :: https://twitter.com/dims
> 
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