mongo-statsd-backend

StatsD backend for Mongo DB

Overview

This is a pluggable backend for StatsD, which publishes stats to mongodb.

How it works

This backend uses Mongo's capped collections to have near file system performance for logging data points from StatsD.

Installation

$ npm install mongo-statsd-backend

Configuration

Inside of your StatsD server config file, use the following parameters:

{
    mongoHost: 'user:pass@localhost',
    mongoPort: 27017,
    mongoMax: 2160, 
    mongoPrefix: true, 
    mongoName: 'databaseName',
    backends: ['/path/to/module/lib/index.js']
}

• mongoHost: the ip address or hostname of the mongo server. Default is localhost.
• mongoMax: the number of data points to cap the collection with. Default is 2160. With Statsd's default of 10 seconds, this gives 6 hours of 'near real-time' data.
• mongoPrefix: Boolean. If true, then the statsd "bucket" names contain a prefix which deterine the database name. For example, if a counter is called 'web-server.page_hits' then the database name will be 'web-server' and the collection name will be 'page_hits'. Otherwise, the database name will be 'statsd' and the collection name will be 'web-server.page_hits'.

Schema

The schema follows the StatsD namespace.

database.collection.tite.flush_rate

bucket.metric.metric_title_flushrate

db.counters

{
    time: 1234567890, // time_stamp from statsd
    count: 124 // Integer from statsd
}

db.timers

{
    time: 1234567890, // time_stamp from statsd
    durations: [0, 1, 2] // Array from statsd
}

db.timer_data

{
    time: 1234567890, // time_stamp from statsd
    mean_90: 1.1764705882352942,
    upper_90: 3,
    sum_90: 80,
    std: 60.18171889277414,
    upper: 526,
    lower: 0,
    count: 75,
    count_ps: 7.5,
    sum: 652,
    mean: 8.693333333333333,
    median: 1
}

db.sets

{
    time: 1234567890, // time_stamp from statsd
    set: ['name1', 'name2'] // Array from statsd
}

Dependencies

• mongodb

Development

• Bugs