1、memcached简介、安装自行google
2、memcached监控与数据导出
在memcached源码目录下的scripts目录中一个perl语言的的脚本，可用于对memcache进行一些日常查询与监控
用法如下：
#./memcached-tool Usage: memcached-tool <host[:port]> [mode] memcached-tool 10.0.0.5:11211 display # shows slabs memcached-tool 10.0.0.5:11211 # same. (default is display) memcached-tool 10.0.0.5:11211 stats # shows general stats memcached-tool 10.0.0.5:11211 dump # dumps keys and values memcached-tool 10.0.0.5:11211 move 7 9 # takes 1MB slab from class #7 # to class #9. You can only move slabs around once memory is totally allocated, and only once the target class is full. (So you can‘t move from #6 to #9 and #7 to #9 at the same itme, since you‘d have to wait for #9 to fill from the first reassigned page)
2.1 memcache状态查询
#./memcached-tool 192.168.10.1:11211 stats #192.168.10.1:11211 Field Value accepting_conns 1 bytes 0 bytes_read 20 bytes_written 5 cmd_flush 0 cmd_get 0 cmd_set 0 connection_structures 3 curr_connections 2 curr_items 0 evictions 0 get_hits 0 get_misses 0 limit_maxbytes 67108864 listen_disabled_num 0 pid 18088 pointer_size 32 rusage_system 0.000999 rusage_user 0.000000 threads 2 time 1422969575 total_connections 4 total_items 0 uptime 25344 version 1.2.8
是不是so eay
2.2 导出memcache内在中的key与value值，命令如下：
# ./memcached-tool 192.168.10.1:11211 dump >./memcachekeys
是不是很简单，当时我心情也和你一样；不过别高兴太早，经过大量数据测试，发现导出的key与内在的key数量不同，要少很多；后来经过大量google得之，memcached自身有缓冲区大小限制，最大2M。这个问题至今没有得到解决，如有大神或路过的兄弟有此问题解决方法，请mail之waitingtome@gmail.com。
2.3 memcached数据导入
#nc 192.168.10.1 11211 <./memcachekeys
right! key-value导入如此简单
本文出自 “拥抱开源” 博客，请务必保留此出处http://junit.blog.51cto.com/9897514/1611277
原文地址：http://junit.blog.51cto.com/9897514/1611277
