前言

因为redis的内存和持久化特性，对超过1M的value存储打算落在SSDB或者etcd这种文件存储方式，etcd是强一致性分布式kv结构，ssdb可以做双主同步，最后测试了etcd和ssdb结果也算意料之中吧，etcd虽然深度和层级都满足，但大size的value还是不适合。。经常会碰到raft内部协议错误，应该是日志同步保持一致性时members的response超时，最终还是决定使用ssdb的双主落地。

etcd测试

使用perl的lwp模块作http-put操作，1M文件大约2秒完成一次kv操作，set 5000层目录时遇到raft等错误。

ssdb可以使用redis-cli也可以使用ssdb-cli连接，测试主主同步：

• server 1配置

server:
        ip:0.0.0.0
        port: 38888
replication:
        binlog: yes
        # Limit sync speed to *MB/s, -1: no limit
        sync_speed: -1
        slaveof:
                # to identify a master even if it moved(ip, port changed)
                # if set to empty or not defined, ip:port will be used.
                id: svc_2
                # sync|mirror, default is sync
                type: mirror
                host: 192.168.6.151
                port: 38889

• server 2配置

server:
        ip: 0.0.0.0
        port: 38889
replication:
        binlog: yes
        # Limit sync speed to *MB/s, -1: no limit
        sync_speed: -1
        slaveof:
                # to identify a master even if it moved(ip, port changed)
                # if set to empty or not defined, ip:port will be used.
                id: svc_1
                # sync|mirror, default is sync
                type: mirror
                host: 192.168.6.150
                port: 38888

主主可以正常同步

//150
-bash-4.1$ redis-cli -p 38888
127.0.0.1:38888> set name jasonqi
OK
//151
-bash-4.1$ ./ssdb-cli -p 38889
ssdb (cli) - ssdb command line tool.
Copyright (c) 2012-2016 ssdb.io

'h' or 'help' for help, 'q' to quit.

ssdb-server 1.9.4

ssdb 127.0.0.1:38889> get name
jasonqi

用redis-benchmark测试ssdb读写性能

• 测试读性能

 redis-benchmark -t get -h 192.168.6.151 -p 38889
====== GET ======
  100000 requests completed in 2.36 seconds
  50 parallel clients
  3 bytes payload
  keep alive: 1
99.89% <= 1 milliseconds
99.95% <= 39 milliseconds
99.97% <= 40 milliseconds
100.00% <= 41 milliseconds
100.00% <= 41 milliseconds
42444.82 requests per second

• 测试读和写性能，生成随机key使用ssdb-tools查看set key是否正常，主主同步正常

redis-benchmark -r 100000 -n 200000 -t get,set -q -p 38889
SET: 21473.05 requests per second
GET: 44903.46 requests per second
ssdb 127.0.0.1:38889> get key:000000099999
xxx

• 测试大报文，10M压测5000

redis-benchmark -n 5000 -q -d 10000000 -t get,set -p 38889 
SET: 13.03 requests per second
GET: 57.27 requests per second