[文章作者:张宴 本文版本:v1.0 最后修改:2008.11.30 转载请注明原文链接:http://blog.zyan.cc/post/384/]

  首先,需要了解Memcached协议,如果不清楚可参考《Memcached 协议中英文对照》。

  1、数据存储(假设key为zhangyan,value为12345)
printf "set zhangyan 0 0 5\r\n12345\r\n" | nc 127.0.0.1 11211
 STORED

  2、数据取回(假设key为zhangyan)
printf "get zhangyan\r\n" | nc 127.0.0.1 11211
 VALUE zhangyan 0 5
 12345
 END


  3、数值增加1(假设key为zhangyan,并且value为正整数)
printf "incr zhangyan 1\r\n" | nc 127.0.0.1 11211
 12346

  4、数值减少3(假设key为zhangyan,并且value为正整数)
printf "decr zhangyan 3\r\n" | nc 127.0.0.1 11211
 12343

  5、数据删除(假设key为zhangyan)
printf "delete zhangyan\r\n" | nc 127.0.0.1 11211
 DELETED

  6、查看Memcached状态
printf "stats\r\n" | nc 127.0.0.1 11211
 STAT pid 3025
 STAT uptime 4120500
 STAT time 1228021767
 STAT version 1.2.6
 STAT pointer_size 32
 STAT rusage_user 433.463103
 STAT rusage_system 1224.515845
 STAT curr_items 1132460
 STAT total_items 8980260
 STAT bytes 1895325386
 STAT curr_connections 252
 STAT total_connections 547850
 STAT connection_structures 1189
 STAT cmd_get 13619685
 STAT cmd_set 8980260
 STAT get_hits 6851607
 STAT get_misses 6768078
 STAT evictions 0
 STAT bytes_read 160396238246
 STAT bytes_written 260080686529
 STAT limit_maxbytes 2147483648
 STAT threads 1
 END


  7、模拟top命令,查看Memcached状态:
watch "printf 'stats\r\n' | nc 127.0.0.1 11211"

  或者
watch "echo stats | nc 127.0.0.1 11211"


技术大类 » Cache与存储 | 评论(38) | 引用(0) | 阅读(49324)
xi2008wang
2008-12-1 00:31
沙发.
maker Homepage
2008-12-1 01:14
张宴周末也不休息?你博客的访问量很不错啊
dayan
2009-3-3 14:11
当然,张宴就是偶像
ONLY
2009-4-10 15:34
请问:

如何在memcached中保存文件?

例如:

cp -rf /var/www/images/* nc 127.0.0.1 11211

这样的,感谢!
VeroModa
2009-4-10 15:36
你好!

请问下,如何向memcached中写入文件,就像是向某个目录中写入文件一样的?

例如:

cp -rf /var/www/images/ nc 127.0.0.1 11211

这样的实现,谢谢!
ONLY
2009-4-13 09:55
在网上找到段代码,据说是向memcached中写入文件的。试过了,什么也没发生!
张宴大大帮看看,是哪里的问题?
引用
<?php

function rscandir($base='', &$data=array()) {
$array = array_diff(scandir($base), array('.', '..'));

foreach($array as $value) :
  if (is_dir($base.$value)) {
    $data = rscandir($base.$value.'/', $data);

  }
  elseif (is_file($base.$value)) {
   $rest = substr($value, -4);
   if ((!strcmp($rest,'.jpg')) || (!strcmp($rest,'.png'))
                                || (!strcmp($rest,'.gif')) ){
         $data[] = $base.$value;
   }
}

endforeach;
return $data;
}

$mylist=rscandir("/var/www/mysite");

$srch = array('/var/www/mysite');
$newval = array('');

$memcache_obj = memcache_connect("192.168.2.1", 11211);

while (list($key, $val) = each($mylist)) {
  $url=str_replace($srch,$newval,$val);
  echo "$key => $val -> ".filesize($val)."\n";
  $value = file_get_contents($val);
  memcache_add($memcache_obj, $url, $value, false, 0);
}
?>

万分感谢!
cnrainbing
2011-8-31 13:53
请问在memcache里面保存文件那么怎么取出来呢?保存:cp -rf /var/www/images/* nc 127.0.0.1 11211获取:命令是?
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