nodejs使用redis连接池

编写的爬虫出了问题，每次请求都会产生一个client。。。
但是把client放在全局又只有一个，这个挂了程序就挂了。

npm install redis-connection-pool

var redisPool = require('redis-connection-pool')('myRedisPool', {
    host: '127.0.0.1', // default 
    port: 6379, //default 
    max_clients: 30, // defalut 
    perform_checks: false, // checks for needed push/pop functionality 
    database: 0, // database number to use 
    options: {
      auth_pass: 'password'
    } //options for createClient of node-redis, optional 
  });

redisPool.set('test-key', 'foobar', function (err) {
  redisPool.get('test-key', function (err, reply) {
    console.log(reply); // 'foobar' 
  });
});

Implemented methods

    get

get(key, cb)

    set

set(key, value, callback)

    expire

expire(key, value, callback)

    del

del(key, callback)

    hget

hget(key, field, callback)

    hgetall

hgetall(key, callback)

    hset

hset(key, field, value, callback)

    hdel

hdel(key, [fields], callback)

    brpop

brpop(key, cb)

    blpop

blpop(key, cb)

    rpush

rpush(key, value, callback)

    lpush

lpush(key, value, callback)