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adding a basic readme
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kastner committed Dec 30, 2010
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StatsD
======

Sometimes you need to count stuff.
Maybe you need to know how long something took.


Concepts
--------

* *buckets*
Each stat is in it's own "bucket". They are not predefined anywhere. Buckets can be named anything that will translate to Graphite (periods make folders, etc)

* *values*
Each stat will have a value. How it is interpreted depends on modifiers

* *flush*
After the flush interval timeout (default 10 seconds), stats are munged and sent over to Graphite.

Counting
--------

gorets:1|c

This is a simple counter. Add 1 to the "gorets" bucket. It stays in memory until the flush interval.


Timing
------

glork:320|ms

The glork took 320ms to complete this time. StatsD figures out 90th percentile, average (mean), lower and upper bounds for the flush interval.

Sampling
--------

gorets:1|c|@0.1

Tells StatsD that this counter is being sent sampled ever 1/10th of the time.


Guts
----

* UDP
Client libraries use UDP to send information to the StatsD daemon.

* NodeJS
* Graphite

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