Pika性能测试
简述
Pika是360DBA和基础架构组联合开发的类Redis存储系统，完全支持Redis协议。
这次测试的目的是从不同维度展示pika的性能表现。
开测
测试环境
CPU型号：Intel(R) Xeon(R) CPU E5-2690 v4 @ 2.60GHz
CPU线程数：56
MEMORY：256G
DISK：3T flash
NETWORK：10000baseT/Full * 2
OS：centos 6.6
Pika版本：2.2.4
压测工具
测试一
测试目的
测试在pika不同worker线程数量下，其QPS上限。
测试条件
pika数据容量：800G
value：128字节
CPU未绑定
测试结果
说明：横轴Pika线程数，纵轴QPS，value为128字节。set3/get7代表30%的set和70%的get。
结论
从以上测试图可以看出，pika的worker线程数设置为20-24比较划算。
测试二
测试目的
测试在最佳worker线程数（20线程）下，pika的rtt表现。
测试条件
pika数据容量：800G
value：128字节
测试结果
====== GET ======
10000000 requests completed in 23.10 seconds
200 parallel clients
3 bytes payload
keep alive: 1
99.89% <= 1 milliseconds
100.00% <= 2 milliseconds
100.00% <= 3 milliseconds
100.00% <= 5 milliseconds
100.00% <= 6 milliseconds
100.00% <= 7 milliseconds
100.00% <= 7 milliseconds
432862.97 requests per second
====== SET ======
10000000 requests completed in 36.15 seconds
200 parallel clients
3 bytes payload
keep alive: 1
91.97% <= 1 milliseconds
99.98% <= 2 milliseconds
99.98% <= 3 milliseconds
99.98% <= 4 milliseconds
99.98% <= 5 milliseconds
99.98% <= 6 milliseconds
99.98% <= 7 milliseconds
99.98% <= 9 milliseconds
99.98% <= 10 milliseconds
99.98% <= 11 milliseconds
99.98% <= 12 milliseconds
99.98% <= 13 milliseconds
99.98% <= 16 milliseconds
99.98% <= 18 milliseconds
99.99% <= 19 milliseconds
99.99% <= 23 milliseconds
99.99% <= 24 milliseconds
99.99% <= 25 milliseconds
99.99% <= 27 milliseconds
99.99% <= 28 milliseconds
99.99% <= 34 milliseconds
99.99% <= 37 milliseconds
99.99% <= 39 milliseconds
99.99% <= 40 milliseconds
99.99% <= 46 milliseconds
99.99% <= 48 milliseconds
99.99% <= 49 milliseconds
99.99% <= 50 milliseconds
99.99% <= 51 milliseconds
99.99% <= 52 milliseconds
99.99% <= 61 milliseconds
99.99% <= 63 milliseconds
99.99% <= 72 milliseconds
99.99% <= 73 milliseconds
99.99% <= 74 milliseconds
99.99% <= 76 milliseconds
99.99% <= 83 milliseconds
99.99% <= 84 milliseconds
99.99% <= 88 milliseconds
99.99% <= 89 milliseconds
99.99% <= 133 milliseconds
99.99% <= 134 milliseconds
99.99% <= 146 milliseconds
99.99% <= 147 milliseconds
100.00% <= 203 milliseconds
100.00% <= 204 milliseconds
100.00% <= 208 milliseconds
100.00% <= 217 milliseconds
100.00% <= 218 milliseconds
100.00% <= 219 milliseconds
100.00% <= 220 milliseconds
100.00% <= 229 milliseconds
100.00% <= 229 milliseconds
276617.50 requests per second
结论
get/set 响应时间 99.9%都在2ms以内。
测试三
测试目的
在pika最佳的worker线程数下，查看各命令的极限QPS。
测试条件
pika的worker线程数：20
key数量：10000
field数量：100（list除外）
value：128字节
命令执行次数：1000万（lrange除外）
测试结果
PING_INLINE: 548606.50 requests per second
PING_BULK: 544573.31 requests per second
SET: 231830.31 requests per second
GET: 512163.91 requests per second
INCR: 230861.56 requests per second
MSET (10 keys): 94991.12 requests per second
LPUSH: 196093.81 requests per second
RPUSH: 195186.69 requests per second
LPOP: 131156.14 requests per second
RPOP: 152292.77 requests per second
LPUSH (needed to benchmark LRANGE): 196734.20 requests per second
LRANGE_10 (first 10 elements): 334448.16 requests per second
LRANGE_100 (first 100 elements): 50705.12 requests per second
LRANGE_300 (first 300 elements): 16745.16 requests per second
LRANGE_450 (first 450 elements): 6787.94 requests per second
LRANGE_600 (first 600 elements): 3170.38 requests per second
SADD: 160885.52 requests per second
SPOP: 128920.80 requests per second
HSET: 180209.41 requests per second
HINCRBY: 153364.81 requests per second
HINCRBYFLOAT: 141095.47 requests per second
HGET: 506791.00 requests per second
HMSET (10 fields): 27777.31 requests per second
HMGET (10 fields): 38998.52 requests per second
HGETALL: 109059.58 requests per second
ZADD: 120583.62 requests per second
ZREM: 161689.33 requests per second
PFADD: 6153.47 requests per second
PFCOUNT: 28312.57 requests per second
PFADD (needed to benchmark PFMERGE): 6166.37 requests per second
PFMERGE: 6007.09 requests per second
结论
整体表现很不错，个别命令表现较弱（LRANGE，PFADD，PFMERGE）。
测试四
测试目的
Pika与Redis的极限QPS对比。
测试条件
pika的worker线程数：20
key数量：10000
field数量：100（list除外）
value：128字节
命令执行次数：1000万（lrange除外）
Redis版本：3.2.0
测试结果
结论
Pika单实例的极限QPS不输于Redis单实例。