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[Chris <question628268@xxxxxxxxxxxxxxxxxxxxx>]

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

Description changed to:
I inherited a semi working graphite setup and I'm attempting to track
down an issue with no data being displayed/written to whisper.  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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