http://blog.thematice.com 发现自己的脑袋不好使了，用blog来记录真的很好用。 Wed, 01 Feb 2012 05:33:00 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 http://blog.thematice.com/html/y2010/04/21/1077/use-curl-check-web-connect-time.html#utm_source=rss&utm_medium=rss&utm_campaign=use-curl-check-web-connect-time http://blog.thematice.com/html/y2010/04/21/1077/use-curl-check-web-connect-time.html#comments Wed, 21 Apr 2010 09:56:28 +0000 稀饭 http://blog.thematice.com/?p=1077 http://blog.thematice.com/html/y2010/04/21/1077/use-curl-check-web-connect-time.html/feed 0 http://blog.thematice.com/html/y2010/02/23/1035/sed1line_zh-cn.html#utm_source=rss&utm_medium=rss&utm_campaign=sed1line_zh-cn http://blog.thematice.com/html/y2010/02/23/1035/sed1line_zh-cn.html#comments Tue, 23 Feb 2010 02:13:11 +0000 稀饭 http://blog.thematice.com/?p=1035 http://blog.thematice.com/html/y2010/02/23/1035/sed1line_zh-cn.html/feed 0 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http://blog.thematice.com/html/y2009/12/15/908/touch-help.html#utm_source=rss&utm_medium=rss&utm_campaign=touch-help http://blog.thematice.com/html/y2009/12/15/908/touch-help.html#comments Tue, 15 Dec 2009 04:18:24 +0000 稀饭 http://blog.thematice.com/html/y2009/12/15/908_touch-help.html http://blog.thematice.com/html/y2009/12/15/908/touch-help.html/feed 0 http://blog.thematice.com/html/y2009/12/12/907/linux-sort-%e5%91%bd%e4%bb%a4%e8%af%a6%e8%a7%a3.html#utm_source=rss&utm_medium=rss&utm_campaign=linux-sort-%25e5%2591%25bd%25e4%25bb%25a4%25e8%25af%25a6%25e8%25a7%25a3 http://blog.thematice.com/html/y2009/12/12/907/linux-sort-%e5%91%bd%e4%bb%a4%e8%af%a6%e8%a7%a3.html#comments Fri, 11 Dec 2009 16:06:31 +0000 稀饭 http://blog.thematice.com/html/y2009/12/12/907_linux-sort-%e5%91%bd%e4%bb%a4%e8%af%a6%e8%a7%a3.html http://blog.thematice.com/html/y2009/12/12/907/linux-sort-%e5%91%bd%e4%bb%a4%e8%af%a6%e8%a7%a3.html/feed 0 http://blog.thematice.com/html/y2009/11/06/861/wget-down-all-web-site.html#utm_source=rss&utm_medium=rss&utm_campaign=wget-down-all-web-site http://blog.thematice.com/html/y2009/11/06/861/wget-down-all-web-site.html#comments Fri, 06 Nov 2009 04:14:32 +0000 稀饭 http://blog.thematice.com/?p=861 http://blog.thematice.com/html/y2009/11/06/861/wget-down-all-web-site.html/feed 0 http://blog.thematice.com/html/y2009/11/01/786/linux%e7%9a%84du%e5%91%bd%e4%bb%a4%e8%af%a6%e8%a7%a3.html#utm_source=rss&utm_medium=rss&utm_campaign=linux%25e7%259a%2584du%25e5%2591%25bd%25e4%25bb%25a4%25e8%25af%25a6%25e8%25a7%25a3 http://blog.thematice.com/html/y2009/11/01/786/linux%e7%9a%84du%e5%91%bd%e4%bb%a4%e8%af%a6%e8%a7%a3.html#comments Sun, 01 Nov 2009 08:44:08 +0000 稀饭 http://blog.thematice.com/?p=786 http://blog.thematice.com/html/y2009/11/01/786/linux%e7%9a%84du%e5%91%bd%e4%bb%a4%e8%af%a6%e8%a7%a3.html/feed 0 http://blog.thematice.com/html/y2009/09/29/709/%e8%bd%ac-memcache%e5%88%86%e6%9e%90%e8%b0%83%e8%af%95-php.html#utm_source=rss&utm_medium=rss&utm_campaign=%25e8%25bd%25ac-memcache%25e5%2588%2586%25e6%259e%2590%25e8%25b0%2583%25e8%25af%2595-php http://blog.thematice.com/html/y2009/09/29/709/%e8%bd%ac-memcache%e5%88%86%e6%9e%90%e8%b0%83%e8%af%95-php.html#comments Mon, 28 Sep 2009 17:08:55 +0000 稀饭 http://blog.thematice.com/?p=709 it_flags & ITEM_LINKED) == 0); assert(it != heads[it->slabs_clsid]); assert(it != tails[it->slabs_clsid]); assert(it->refcount == 0); it->slabs_clsid = 0; it->it_flags |= ITEM_SLABBED; slabs_free(it, ntotal); } 做一个轮流存储的机制使用预分配的内存,这样的好处是其他地方不需要做任何修改就可以了,当然你可以在源代码中加入上面的代码,并将它们放在一个自定义的宏后面. 3. 加速比. 加速比,也即事件的处理效率.是否可以修改libevent的事件处理效率,需要研究.如果内存空间很大,可以将freeconn的数值调大,增加预分配的conn内存大小. 是否可以将memcache做成多线程处理,但在处理多线程数据同步是个问题. 如果有时间,愿意来试试这个策略. 4. 安全性能. memcache还存在一个比较显著的问题,那就是其安全性能.只要了解memcache监听的端口,对于能够使用分布式memcache进行数据通信的网络环境的机器,都可以通过memcache协议于memcache服务器进行通信,获取或种植数据.不能保证种植进内存里的数据不会被别有心意的人再利用.也不能保证服务器的内存不被漫天遍地的垃圾数据所堆积,造成命中极低. memcache的设计理念在一个轻字,如果对每次Client的通讯需要校验身份,那么恐怕memcache也就达不到其想要的效果了.存在解决办法缓解这个问题,一般而言,需要使用memcache服务的机器,可以在Server维持一张红色列表.这张表上的机器便可以获取服务.很显然,memcache并非任意Client都能访问,只有信任的机器访问,那么为什么不将这些信任的机器放在一个/etc/mem_passwd下呢. 还有,memcached走udp时,很大几率接受到upd时,都会使服务死掉,特别是set,add,replace时,这个问题需要去考究一下.不过没有时间了. 4.memcache测试分析 服务器端memcache在命令行运行的参数: 引用 # memcached –d –m 512 –l *.*.*.* -u ** -f 1.00001 –n 16 –c [...]]]> http://blog.thematice.com/html/y2009/09/29/709/%e8%bd%ac-memcache%e5%88%86%e6%9e%90%e8%b0%83%e8%af%95-php.html/feed 0 http://blog.thematice.com/html/y2009/09/26/736/unixlinux-shell%e7%a8%8b%e5%ba%8f%e8%ae%be%e8%ae%a1-case%e8%af%ad%e5%8f%a5.html#utm_source=rss&utm_medium=rss&utm_campaign=unixlinux-shell%25e7%25a8%258b%25e5%25ba%258f%25e8%25ae%25be%25e8%25ae%25a1-case%25e8%25af%25ad%25e5%258f%25a5 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http://blog.thematice.com/html/y2009/06/05/472/http_load-webbench-ab-siege%e5%b0%8f%e7%bb%93.html#utm_source=rss&utm_medium=rss&utm_campaign=http_load-webbench-ab-siege%25e5%25b0%258f%25e7%25bb%2593 http://blog.thematice.com/html/y2009/06/05/472/http_load-webbench-ab-siege%e5%b0%8f%e7%bb%93.html#comments Fri, 05 Jun 2009 07:01:15 +0000 稀饭 http://blog.thematice.com/?p=472 http://blog.thematice.com/html/y2009/06/05/472/http_load-webbench-ab-siege%e5%b0%8f%e7%bb%93.html/feed 6 http://blog.thematice.com/html/y2008/02/22/61/linux-command-used-to-introduce.html#utm_source=rss&utm_medium=rss&utm_campaign=linux-command-used-to-introduce http://blog.thematice.com/html/y2008/02/22/61/linux-command-used-to-introduce.html#comments Fri, 22 Feb 2008 11:23:26 +0000 稀饭 http://www.gruelstate.cn/?p=61 http://blog.thematice.com/html/y2008/02/22/61/linux-command-used-to-introduce.html/feed 21