Writes large files with low memory requirements

write-large-file.js

var items = 2500000000; // number of lines to write to the file. Currently >20 GB for sequential ints
var buffer_size = 1000000; // amount of items to buffer in memory. Currently ~200 MB for ints

var fs = require('fs')
var buffer = [];

for (var i =0; i < items; i++) {
  var data = i; // make it a random integer, or whatever else your heart desires
  buffer.push(data);

  if (buffer.length == ) {
    fs.appendFileSync('large-file', buffer.join("\n"))
    buffer = [];
  }
}