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。 Thu, 09 Feb 2012 13:33:30 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 http://blog.thematice.com/html/y2010/1074_oracle%e5%ae%89%e8%a3%85-linux%e5%86%85%e6%a0%b8%e5%8f%82%e6%95%b0-%e5%85%b1%e4%ba%ab%e5%86%85%e5%ad%98%e4%bf%a1%e5%8f%b7%e9%87%8f%e8%ae%be%e7%bd%ae.html#utm_source=rss&utm_medium=rss&utm_campaign=oracle%25e5%25ae%2589%25e8%25a3%2585-linux%25e5%2586%2585%25e6%25a0%25b8%25e5%258f%2582%25e6%2595%25b0-%25e5%2585%25b1%25e4%25ba%25ab%25e5%2586%2585%25e5%25ad%2598%25e4%25bf%25a1%25e5%258f%25b7%25e9%2587%258f%25e8%25ae%25be%25e7%25bd%25ae http://blog.thematice.com/html/y2010/1074_oracle%e5%ae%89%e8%a3%85-linux%e5%86%85%e6%a0%b8%e5%8f%82%e6%95%b0-%e5%85%b1%e4%ba%ab%e5%86%85%e5%ad%98%e4%bf%a1%e5%8f%b7%e9%87%8f%e8%ae%be%e7%bd%ae.html#comments Mon, 20 Dec 2010 09:39:57 +0000 稀饭 http://blog.thematice.com/?p=1074 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http://blog.thematice.com/html/y2010/1070_ucenter-home-%e6%95%b0%e6%8d%ae%e8%a1%a8%e7%bb%93%e6%9e%84.html#utm_source=rss&utm_medium=rss&utm_campaign=ucenter-home-%25e6%2595%25b0%25e6%258d%25ae%25e8%25a1%25a8%25e7%25bb%2593%25e6%259e%2584 http://blog.thematice.com/html/y2010/1070_ucenter-home-%e6%95%b0%e6%8d%ae%e8%a1%a8%e7%bb%93%e6%9e%84.html#comments Tue, 30 Mar 2010 10:53:37 +0000 稀饭 http://blog.thematice.com/html/y2010/03/30/1070/ucenter-home-%e6%95%b0%e6%8d%ae%e8%a1%a8%e7%bb%93%e6%9e%84.html http://blog.thematice.com/html/y2010/1070_ucenter-home-%e6%95%b0%e6%8d%ae%e8%a1%a8%e7%bb%93%e6%9e%84.html/feed 0 http://blog.thematice.com/html/y2010/944_redis-memcached-tokyo-tyrant-and-mysql-comparision.html#utm_source=rss&utm_medium=rss&utm_campaign=redis-memcached-tokyo-tyrant-and-mysql-comparision http://blog.thematice.com/html/y2010/944_redis-memcached-tokyo-tyrant-and-mysql-comparision.html#comments Thu, 14 Jan 2010 06:11:44 +0000 稀饭 http://blog.thematice.com/?p=944 http://blog.thematice.com/html/y2010/944_redis-memcached-tokyo-tyrant-and-mysql-comparision.html/feed 4 http://blog.thematice.com/html/y2009/936_linux%e5%a4%a7%e4%ba%8e2t%e7%9a%84%e7%a3%81%e7%9b%98%e4%bd%bf%e7%94%a8gpt%e5%88%86%e5%8c%ba%e6%96%b9%e5%bc%8f.html#utm_source=rss&utm_medium=rss&utm_campaign=linux%25e5%25a4%25a7%25e4%25ba%258e2t%25e7%259a%2584%25e7%25a3%2581%25e7%259b%2598%25e4%25bd%25bf%25e7%2594%25a8gpt%25e5%2588%2586%25e5%258c%25ba%25e6%2596%25b9%25e5%25bc%258f http://blog.thematice.com/html/y2009/936_linux%e5%a4%a7%e4%ba%8e2t%e7%9a%84%e7%a3%81%e7%9b%98%e4%bd%bf%e7%94%a8gpt%e5%88%86%e5%8c%ba%e6%96%b9%e5%bc%8f.html#comments Mon, 28 Dec 2009 13:02:29 +0000 稀饭 http://blog.thematice.com/?p=936 http://blog.thematice.com/html/y2009/936_linux%e5%a4%a7%e4%ba%8e2t%e7%9a%84%e7%a3%81%e7%9b%98%e4%bd%bf%e7%94%a8gpt%e5%88%86%e5%8c%ba%e6%96%b9%e5%bc%8f.html/feed 0 http://blog.thematice.com/html/y2009/709_%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/y2009/709_%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/y2009/709_%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/y2009/710_%e5%a4%87%e5%bf%98mysql%e7%9a%84filesort.html#utm_source=rss&utm_medium=rss&utm_campaign=%25e5%25a4%2587%25e5%25bf%2598mysql%25e7%259a%2584filesort http://blog.thematice.com/html/y2009/710_%e5%a4%87%e5%bf%98mysql%e7%9a%84filesort.html#comments Mon, 21 Sep 2009 03:21:40 +0000 稀饭 http://blog.thematice.com/?p=710 http://blog.thematice.com/html/y2009/710_%e5%a4%87%e5%bf%98mysql%e7%9a%84filesort.html/feed 0 http://blog.thematice.com/html/y2008/112_five-commonly-used-analytical-tool-mysql-slow-log-comparison.html#utm_source=rss&utm_medium=rss&utm_campaign=five-commonly-used-analytical-tool-mysql-slow-log-comparison http://blog.thematice.com/html/y2008/112_five-commonly-used-analytical-tool-mysql-slow-log-comparison.html#comments Fri, 17 Oct 2008 04:24:23 +0000 稀饭 http://www.gotohand.cn/?p=112 http://blog.thematice.com/html/y2008/112_five-commonly-used-analytical-tool-mysql-slow-log-comparison.html/feed 1 http://blog.thematice.com/html/y2008/111_no-space-left-on-device-analysis-and-solutions.html#utm_source=rss&utm_medium=rss&utm_campaign=no-space-left-on-device-analysis-and-solutions http://blog.thematice.com/html/y2008/111_no-space-left-on-device-analysis-and-solutions.html#comments Thu, 16 Oct 2008 02:59:14 +0000 稀饭 http://www.gotohand.cn/?p=111 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