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[Anatoliy Dobrosynets <question228472@xxxxxxxxxxxxxxxxxxxxx>]

Question #228472 on Graphite changed:
https://answers.launchpad.net/graphite/+question/228472

Anatoliy Dobrosynets proposed the following answer:
Yes, graphite-web fetchData algorythm you described is correct.

My only concern was ConsistentHashRing.
Is it really that smart to return the same value for a given key, despite the fact it's hash_ring has been generated on differnt base ?

I couldn't believe that if 
   DESTINATIONS     = ['10.4.0.1:a', '10.4.0.1:b', '10.4.0.2:c', '10.4.0.2:d']
   carbon-relay routes metric to any carbon-cache at host-1,
   and host-1 webapp has CARBONLINK_HOSTS = ['10.4.0.1:a', '10.4.0.1:b']
then this is always True for any metric:
   ConsistentHashRing(DESTINATIONS).get_host(metric) == ConsistentHashRing(CARBONLINK_HOSTS).get_host(metric)

Today I made more tests and got really impressed -
https://gist.github.com/anatolijd/5611927 .

I don't understand this magic but I've got the evidence of the faith now
:)

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