example for using rrdjs

rdd.js

var rrdjs = require('rrdjs');


var start = 0;
var end = start;
var i = 0;
step = 10;

var sources = [ "DS:test:GAUGE:1:0:U", "RRA:MAX:0.5:10:6" ];
rrdjs.create('test.rrd', 1, start, sources, created);


function duration() {
  return ~~(Date.now() / 1000) - start;
}


var s = 100;
function update() {
  if(end <= 30) {
    console.log([ end + ':' + s ]);
    rrdjs.update('test.rrd', 'test', [ end + ':' + s++ ], function() {});
    end += 1;
    s++;

  } else {
    finish()
  }
}



function finish() {
  rrdjs.fetch('test.rrd', 'MAX', 0, end - step, step, function(){
    console.log(arguments);
    process.exit()
  })
}


function created(err) {
  setInterval(update, 1000);
}