【压测环境】
操作系统： Ubuntu 14.04 LTS
Linux版本： 3.13.0-24-generic x86_64 GNU/Linux
处理器： 4核的 AMD Athlon(tm) II X4 640 Processor @ 800MHz
机器内存：共 8GB，已使用 6GB，未使用 2GB，交换区 未使用
Redis版本：2.8.17
Redis内存：500MB
【压测结果】
压测原生的 Redis 性能（非Java客户端），结果如下：
hset 和 hget 都能在 4ms 之内完成，且每秒并发处理量都在 7.5万个请求之上；
hmset 和 hmget 一次操作两个数据，都能在 5ms 之内完成，且每秒并发处理量都在 7.1万个请求之上。
【参考资料】
Benchmarks: See how fast Redis is in different platforms. （本文档很有价值，建议详细阅读！！！）
【详细压测数据】
bert@MS-7641-14102010:/usr/apps/redis/bin$ ./redis-benchmark -r 500000 -n 500000 hset myhash rand_int rand_int rand_int
====== hset myhash rand_int rand_int rand_int ======
500000 requests completed in 6.66 seconds
50 parallel clients
3 bytes payload
keep alive: 1
99.80% <= 1 milliseconds
99.96% <= 2 milliseconds
99.99% <= 3 milliseconds
100.00% <= 3 milliseconds
75108.91 requests per second
bert@MS-7641-14102010:/usr/apps/redis/bin$ ./redis-benchmark -r 500000 -n 500000 hget myhash rand_int rand_int
====== hget myhash rand_int rand_int ======
500000 requests completed in 6.62 seconds
50 parallel clients
3 bytes payload
keep alive: 1
99.88% <= 1 milliseconds
99.99% <= 3 milliseconds
100.00% <= 4 milliseconds
100.00% <= 5 milliseconds
100.00% <= 5 milliseconds
75471.70 requests per second
bert@MS-7641-14102010:/usr/apps/redis/bin$ ./redis-benchmark -r 500000 -n 500000 hmset myhash rand_int rand_int rand_int rand_int
====== hmset myhash rand_int rand_int rand_int rand_int ======
500000 requests completed in 7.04 seconds
50 parallel clients
3 bytes payload
keep alive: 1
97.18% <= 1 milliseconds
99.89% <= 2 milliseconds
99.96% <= 3 milliseconds
99.99% <= 5 milliseconds
100.00% <= 5 milliseconds
71063.11 requests per second
bert@MS-7641-14102010:/usr/apps/redis/bin$ ./redis-benchmark -r 500000 -n 500000 hmget myhash rand_int rand_int rand_int
====== hmget myhash rand_int rand_int rand_int ======
500000 requests completed in 6.82 seconds
50 parallel clients
3 bytes payload
keep alive: 1
99.70% <= 1 milliseconds
99.97% <= 2 milliseconds
99.98% <= 3 milliseconds
99.99% <= 4 milliseconds
100.00% <= 4 milliseconds
73335.29 requests per second