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StatsD is a simple NodeJS daemon (and by “simple” I really mean simple — NodeJS makes event-based systems like this ridiculously easy to write) that listens for messages on a UDP port. (See Flickr’s “Counting & Timing” for a previous description and implementation of this idea, and check out the open-sourced code on github to see our version.) It parses the messages, extracts metrics data, and periodically flushes the data to graphite (which I previously wrote about here).

Github: github.com/etsy/statsd
The Etsy blog post: codeascraft.etsy.com/2011/02/15/measure-…

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