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[Question #628268]: Verifying data sent from relay to cache.

To: graphite-dev@xxxxxxxxxxxxxxxxxxx
From: Chris <question628268@xxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 25 Apr 2017 18:03:33 -0000
Reply-to: question628268@xxxxxxxxxxxxxxxxxxxxx
Sender: bounces@xxxxxxxxxxxxx

New question #628268 on Graphite:
https://answers.launchpad.net/graphite/+question/628268

I'm attempting to track down an issue with our Graphite setup and I'm running into a lack of understanding on my part.  So please let me know if I'm wrong about any of the conceptual data flow.

I can restart all services(statsd, carbon-cache, relay, aggregate) and get one or two points of data written to the Whisper DB.

My understanding is that the data flow is:

Statsd -> Relay -> Cache which then writes to the Whisper DB.  I'm a little iffy on what Aggregate does.

At this point I'm attempting to verify data is going from Relay to Cache using tcpdump to listen on port 2013/2014 and I'm not catching anything.  What's the best way to verify data flow and can I post any logs to make this easier to understand?


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