redis 分片

1.使用客户端的分配分片（可以自定义配置，缺点：节点增加，服务就要改代码，不灵活）
  JedisPoolConfig poolConfig=new JedisPoolConfig();
        JedisShardInfo jedisShardInfo1=new JedisShardInfo("127.0.0.1",6379);
        jedisShardInfo1.setPassword("123456");
        JedisShardInfo jedisShardInfo2=new JedisShardInfo("115.29.140.141",6800);
        jedisShardInfo2.setPassword("Wang_Biao-22@1317");

        List<JedisShardInfo> infos=Arrays.asList(jedisShardInfo1,jedisShardInfo2);
        ShardedJedisPool shardedJedisPool=new ShardedJedisPool(poolConfig,infos);
        ShardedJedis jedis=null;

        try {
            jedis=shardedJedisPool.getResource();
            for (int i = 1; i <=100 ; i++) {
                jedis.set("K"+i,""+i);
                jedis.expire("K"+i,300);
            }
            for (int i = 0; i <100 ; i++) {
                Client client=jedis.getShard("K"+i).getClient();
                System.out.println("取到的值:"+jedis.get("K"+i)+","+"当前key位于："+client.getHost()+":"+client.getPort());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            if(jedis!=null){
                jedis.close();
            }
        }


2.Twemproxy
3.Codis