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/y2010/01/27/635/linux%e8%b6%85%e7%ba%a7%e7%bb%88%e7%ab%afminicom%e8%ae%be%e7%bd%ae.html#utm_source=rss&utm_medium=rss&utm_campaign=linux%25e8%25b6%2585%25e7%25ba%25a7%25e7%25bb%2588%25e7%25ab%25afminicom%25e8%25ae%25be%25e7%25bd%25ae http://blog.thematice.com/html/y2010/01/27/635/linux%e8%b6%85%e7%ba%a7%e7%bb%88%e7%ab%afminicom%e8%ae%be%e7%bd%ae.html#comments Wed, 27 Jan 2010 15:59:07 +0000 稀饭 http://blog.thematice.com/?p=635 http://blog.thematice.com/html/y2010/01/27/635/linux%e8%b6%85%e7%ba%a7%e7%bb%88%e7%ab%afminicom%e8%ae%be%e7%bd%ae.html/feed 0 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http://blog.thematice.com/html/y2009/10/25/774/lighttpdmodcache%e5%ae%9e%e7%8e%b0%e5%af%b9%e5%b0%8f%e5%9b%be%e7%89%87%e7%9a%84cache.html#utm_source=rss&utm_medium=rss&utm_campaign=lighttpdmodcache%25e5%25ae%259e%25e7%258e%25b0%25e5%25af%25b9%25e5%25b0%258f%25e5%259b%25be%25e7%2589%2587%25e7%259a%2584cache http://blog.thematice.com/html/y2009/10/25/774/lighttpdmodcache%e5%ae%9e%e7%8e%b0%e5%af%b9%e5%b0%8f%e5%9b%be%e7%89%87%e7%9a%84cache.html#comments Sat, 24 Oct 2009 16:59:38 +0000 稀饭 http://blog.thematice.com/?p=774 http://blog.thematice.com/html/y2009/10/25/774/lighttpdmodcache%e5%ae%9e%e7%8e%b0%e5%af%b9%e5%b0%8f%e5%9b%be%e7%89%87%e7%9a%84cache.html/feed 0 http://blog.thematice.com/html/y2009/10/19/762/management-terminal.html#utm_source=rss&utm_medium=rss&utm_campaign=management-terminal http://blog.thematice.com/html/y2009/10/19/762/management-terminal.html#comments Mon, 19 Oct 2009 06:22:30 +0000 稀饭 http://blog.thematice.com/html/y2009/10/19/762_%e7%ae%a1%e7%90%86%e7%bb%88%e7%ab%af.html http://blog.thematice.com/html/y2009/10/19/762/management-terminal.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