1、memcached簡介、安裝自行google
2、memcached監控與數據導出
在memcached源碼目錄下的scripts目錄中一個perl語言的的腳本，可用於對memcache進行一些日常查詢與監控
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狀態查詢
#./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 導出memcache內在中的key與value值，命令如下：
# ./memcached-tool 192.168.10.1:11211 dump >./memcachekeys
是不是很簡單，當時我心情也和你一樣；不過別高興太早，經過大量數據測試，發現導出的key與內在的key數量不同，要少很多；後來經過大量google得之，memcached自身有緩衝區大小限制，最大2M。這個問題至今沒有得到解決，如有大神或路過的兄弟有此問題解決方法，請mail之[email protected]。
2.3 memcached數據導入
#nc 192.168.10.1 11211 <./memcachekeys
right! key-value導入如此簡單