PHP empty和isset源码分析

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Published on: 2015 年 07 月 17 日

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linux memcache安装配置

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Published on: 2014 年 06 月 24 日

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linux nfs安装配置

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Published on: 2014 年 06 月 17 日

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Rsync服务器服务配置启动

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Published on: 2014 年 05 月 30 日

安装了rsync程序后,运行以下shell程序即可完成rsync服务的启动,自行修改相关的module和认证用户密码等配置,重新运行则重启。 (more...)

shell实现ssh自动登录

Categories: 工具语言
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Published on: 2014 年 03 月 07 日

mac下没有找到好用的类似secureCRT,就自己写了个自动登录的脚本,分享一下,如果是新浪的,就基本不用修改代码就直接能用。(其实是想表示虽然那么久没更新,但博主还活着~) (more...)

协同过滤 Collaborative Filtering

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Published on: 2013 年 09 月 29 日

协同过滤算法是推荐系统中最古老,也是最简单高效的推荐算法。简单说协同过滤就是根据以往的用户产生的数据分析,对用户的新行为进行匹配分析来给用户推荐用户最有可能感兴趣的内容。 (more...)

Difference Between InnoDB and MyISAM

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Published on: 2013 年 05 月 30 日
  • The big difference between MySQL Table Type MyISAM and InnoDB is that InnoDB supports transaction
  • InnoDB supports some newer features: Transactions, row-level locking, foreign keys
  • InnoDB is for high volume, high performance

Most people use MyISAM if they need speed and InnoDB for data integrity. You can use more than one or any combination of these table types in your database. Remember to asses the needs of your application before building it. Even though MyISAM is faster than InnoDB in the MySQL world, InnoDB is fast compared to any database engine.With InnoDB you get transactions, speed and integrity three features not usually used in the same sentence.

InnoDB has been designed for maximum performance when processing large data volumes. Its CPU efficiency is probably not matched by any other disk-based relational database engine.

Fully integrated with MySQL Server, the InnoDB storage engine maintains its own buffer pool for caching data and indexes in main memory. InnoDB stores its tables and indexes in a tablespace, which may consist of several files (or raw disk partitions). This is different from, for example, MyISAM tables where each table is stored using separate files. InnoDB tables can be of any size even on operating systems where file size is limited to 2GB.

So, what do you think about those engines?? Please feel free to discuss it.

For more information visit http://dev.mysql.com/

跳跃表

Categories: 数据结构和算法
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Published on: 2013 年 03 月 18 日

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几种流行的hash函数

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Published on: 2013 年 03 月 13 日

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Effective JAVA 读书笔记

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Published on: 2013 年 01 月 07 日

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PHP实现双向链表

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Published on: 2012 年 10 月 30 日

由于需要对一组数据多次进行移动操作,所以写个双向链表。但对php实在不熟悉,虽然测试各个方法没啥问题,就是不知道php语言深层的这些指针和unset有什么注意的地方,贴出来让大家教育吧。效率没测试....求谅解~
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Clustering Algorithm/聚类算法[二]

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Published on: 2012 年 10 月 10 日

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