Implementation of Redis connection pooling

redis-pool.js

var redisConfig = {
  "host" : "localhost",
  "port" : "6379",
  "maxConnections" : 10,
  "minConnections" : 5,
  "debug" : true
}

var redis = require("redis");
var genericPool = require('generic-pool');


// refer to https://github.com/coopernurse/node-pool#documentation for pool options
var redisPool = genericPool.Pool({
    name : 'redis',

    create : function (callback) {

      var client = redis.createClient(redisConfig["port"],
          redisConfig["host"]);

      client.on("error", function (err) {
        console.error(err);
      });

      client._end = client.end;

      client.end = function () {
        redisPool.release(client);
      };

      callback(null, client);
    },

    destroy : function (client) {
      client._end();
    },

    max : redisConfig["maxConnections"],

    min : redisConfig["minConnections"],

    idleTimeoutMillis : 30000,

    log : redisConfig["debug"]
  });

redisPool.acquire(function (err, client) {
  client.get("key", function (err, value) {
    // do whatever you want

    // call client.end() to return it back to the pool
    client.end();
  });