Redis insertion experiment with Node

experiment.js

#!/usr/bin/env node

var redis = require('redis')
  , client = redis.createClient()
  , numEntries = parseInt(process.argv[2], 10)
  , paused = false
  , numKeys
  , key
  , set;

function seededArray(len) {
  var array = new Array(len);
  for (var i = 0; i < len; i++) {
    array[i] = 'a';
  }
  return array;
}

function feed () {
  if (numEntries <= 0) {
    console.log('Finished');
    process.exit(0);
  }

  numEntries--;
  numKeys = Math.floor(Math.random() * 10) + 1;
  key = "exp:" + numEntries;
  set = seededArray(numKeys);

  if (client.sadd(key, set) === false) {
    console.log('Pausing at ', numEntries, ' entries remaining');
    paused = true;
  } else {
    console.log('INSERTED ', key, ' => ', set);
    process.nextTick(feed);
  }
}

client.on('error', function (err) {
  console.log('Error ' + err);
});

client.on('ready', function () {
  console.log('Flushing DB');

  client.flushall(function () {});

  console.log('And away we go!');
  console.time('import');

  feed();
});

client.on('drain', function () {
  if (paused) {
    console.log('Resuming at ', numEntries, ' remaining');
    paused = false;
    process.nextTickt(op);
  }
});