[openstack-dev] [Ceilometer] Pipeline Retry Semantics ...

Sandy Walsh sandy.walsh at rackspace.com
Thu Aug 15 16:20:02 UTC 2013

Recently I've been focused on ensuring we don't drop notifications in
CM. But problems still exist downstream, after we've captured the raw

>From the efforts going on with the Ceilometer sample pipeline, the new
dispatcher model and the upcoming trigger pipeline, the discussion
around retry semantics has being coming up a lot.

In other words "What happens when step 4 of a 10 step pipeline fails?"

As we get more into processing billing events, we really need to have a
solid understanding of how we prevent double-counting or dropping events.

I've started writing down some thoughts here:

It's a little scattered and I'd like some help tuning it.

Hopefully it'll help grease the skids for the Icehouse Summit talks.


cc/ Josh, I think the State Management team can really help out here.

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