metrics-io

When its comes to metrics, aggregations plays a huge role. If that fails, then there is no use of collecting metrics. Here is the how metrics-io do it correctly.

• There are sources who generate metrics
• metrics will be collected with the awareness of the source
• When it comes aggregations, metrics will be aggregated in 2 steps
• It will first aggregate values in each source, then result will be aggregated
• function which used to aggregate metrics can be specified in runtime
• result will be grouped into time resolutions

Tracking Metrics

var MONGODB_URL = "mongodb://localhost/test";
var metrics = require('metrics-io')(MONGODB_URL);
 
metrics.track('no-of-users', 344, 'my-source', function(err) {
 
});

Aggregate Metrics

API

@param {String} name - name of the metric
    @param {Constant} resolution - resolution type
        possible values: "day", "hour", "minute", "five_secs"
    @param {String} valueAggregator - aggregation function to be used for aggregating metric of the each source
        possible values: "sum", "avg", "min", "max"
    @param {String} sourceAggregator - aggregation function to be used for the aggregating sources(value from metricsAggregation)
        possible values: "sum", "avg", "min", "max"
    @param {Object} query - mongodb query for filtering out metrics
        only supports date and source only
    @param {Function} callback - callback function
        callback(err, results)

Metrics.aggregate = function(name, resolution, valueAggregator, sourceAggregator, query, callback){}

Example

    
var MONGODB_URL = "mongodb://localhost/test";
var metrics = require('metrics-io')(MONGODB_URL);
 
metrics.aggregate('no-of-users', 'minute', 'avg', 'sum', {date: { $gte: 1361030882576 }}, function(err, result) {
 
});