一直有个想法,做一个只有redis作数据库的系统,一直对redis的功能比较赞赏,但不知道redis的单线程稳定性如何,之前测试过100万Key的写入锁,今天又测试了一下正常读写下redis cli的get稳定性。
结果看起来还可以,2万次左右的单次读取锁0.001秒,如果每次展示需要读取300次cache,整体来说,在redis上的时间损失也不超过0.1秒,跟mysql动则0.1秒的查询效率来看,还是快得多了。
但还不会做redis db集群和数据恢复,学习ing。
官方网站 http://redis.io/
Redis命令 http://redis.io/commands
Redis协议 http://redis.io/topics/protocol
NoSQLFan Redis资料汇总专题 http://blog.nosqlfan.com/html/3537.html
Ubuntu 12.04 Aspire,10G
shuhai@Aspire:/wwwroot/php/redis$ cat /proc/meminfo MemTotal: 10092540 kB MemFree: 4093172 kB Buffers: 629836 kB Cached: 2685732 kB
redis版本
shuhai@Aspire:/wwwroot/php/redis$ rediscli v rediscli 2.2.12
shuhai@Aspire:/wwwroot/php/redis$ redisserver v Redis server version 2.2.12 (00000000:0)
测试一,读取锁时间
shuhai@Aspire:/wwwroot/php/redis$ php locktest.php 60910 => 0.0011389255523682 10954 => 0.0012128353118896 6543 => 0.0011680126190186 599 => 0.0013341903686523 89891 => 0.0011501312255859 20667 => 0.001054048538208 94608 => 0.0011560916900635 127 => 0.0016088485717773 380 => 0.0011329650878906 6977 => 0.0019309520721436 21108 => 0.0011842250823975 31646 => 0.0012660026550293 143386 => 0.0012049674987793
connect("tcp://127.0.0.1:6379"); $count = 0; while(true) { $s = microtime(true); $redis>get('shuhai'); $e = microtime(true); $t = $e$s; $count ++; if($t > 0.001) { echo "$count => $tn"; $count = 0; } }
测试二,平均锁读取数量
shuhai@Aspire:/wwwroot/php/redis$ php locktest.php 23260 18449.5 40499 30982 32170.6 32801.666666667 33552.428571429 31086.875 27664.333333333 28921.5 27306.545454545 25048.25 23313.923076923 22005.285714286 24101.866666667 26472.0625 25839.764705882 24858.722222222 26115.210526316 25114.75 24149.714285714 29368.954545455
shuhai@Aspire:/wwwroot/php/redis$ cat locktest.php connect("tcp://127.0.0.1:6379"); $count = 0; while(true) { $s = microtime(true); $redis>get('shuhai'); $e = microtime(true); $t = $e$s; $count ++; if($t > 0.001) { $array[] = $count; echo array_sum( $array ) / count( $array ) . "n"; $count = 0; } }