求高效的缓存类,每秒访问1W次页面,每个页面都不一样,可能是百万级别的,,想试用缓存处理, 服务器扛不住啊,找了一个缓存类,貌似 没解决负载问题。!!!
<?php/** * auto_cache.php 实现智能的自动缓存。 * 使用办法极其简单: * 在需要实现缓存功能的页面 require 'auto_cache.php'; 就ok了 * @author rains31@gmail.com *///存放缓存的根目录,最好是放到/tmp目录,尤其是虚拟主机用户,因为/tmp目录不占自己的主页空间啊:)define('CACHE_ROOT', dirname(__FILE__).'/cachess');//缓存文件的生命期,单位秒,86400秒是一天define('CACHE_LIFE', 1864000);//缓存文件的扩展名,千万别用 .php .asp .jsp .pl 等等define('CACHE_SUFFIX','.html');//缓存文件名$file_name = md5($_SERVER["HTTP_REFERER"]).CACHE_SUFFIX;//缓存目录,根据md5的前两位把缓存文件分散开。避免文件过多。如果有必要,可以用第三四位为名,再加一层目录。//256个目录每个目录1000个文件的话,就是25万个页面。两层目录的话就是65536*1000=六千五百万。//不要让单个目录多于1000,以免影响性能。$cache_dir = CACHE_ROOT.'/'.$_SERVER['SERVER_NAME'];//缓存文件$cache_file = $cache_dir.'/'.substr($file_name,4);//GET方式请求才缓存,POST之后一般都希望看到最新的结果if($_SERVER['REQUEST_METHOD']=='GET'){ //如果缓存文件存在,并且没有过期,就把它读出来。 if(file_exists($cache_file) && time()-filemtime($cache_file)<CACHE_LIFE) { $fp = fopen($cache_file,'rb'); fpassthru($fp); fclose($fp); exit; } elseif(!file_exists($cache_dir)) { if(!file_exists(CACHE_ROOT)) { mkdir(CACHE_ROOT,0777); chmod(CACHE_ROOT,0777); } mkdir($cache_dir,0777); chmod($cache_dir,0777); } //回调函数,当程序结束时自动调用此函数 function auto_cache($contents) { global $cache_file; $fp = fopen($cache_file,'wb'); fwrite($fp,$contents); fclose($fp); chmod($cache_file,0777); //生成新缓存的同时,自动删除所有的老缓存。以节约空间。 clean_old_cache(); return $contents; } function clean_old_cache() { chdir(CACHE_ROOT); foreach (glob("*/*".CACHE_SUFFIX) as $file) { if(time()-filemtime($file)>CACHE_LIFE) { unlink($file); } } } //回调函数 auto_cache ob_start('auto_cache');}else{ //不是GET的请求就删除缓存文件。 if(file_exists($cache_file))unlink($cache_file);}?>
大神帮我看看!!!!!!
回复讨论(解决方案)
这么高的吞吐量,用文件缓存是不可能的
那怎么缓存?
这么高的吞吐量,用文件缓存是不可能的
那怎么办?????
当然是换服务器,你的量都超门户站了。
不是有基于内存的缓存软件和数据库吗?
你可以根据你的硬件配置和操作系统选一款
不是有基于内存的缓存软件和数据库吗?
你可以根据你的硬件配置和操作系统选一款
呵呵其实我说的夸张了些,,,没有访问那么多,,就是 发现 访问多了之后 打开速度很慢,,
而且cpu 占用很多,,删除缓存后, 貌似好一些,,,请高手看看, 是否是我的缓存写的有些问题。。
不是有基于内存的缓存软件和数据库吗?
你可以根据你的硬件配置和操作系统选一款
大概高峰期,每秒访问20次吧,一共30个网站,这样 就有60次
先优化下代码和SQL吧,然后是文件分离、缓存,基本可以解决大部分的高并发,如果还不行说明你的量不是一般的技术上能解决的,看看yahoo、google怎么做的吧。
大概高峰期,每秒访问20次吧,一共30个网站,这样 就有60次
影响网站访问速度的因素很多,比如数据库压力,服务器压力,带宽压力等,如果是你标题说的每秒万次PV,那我前面说的随便哪个都不是一台服务器能承受的,你必须做服务器集群了。如果是你后面说每秒20次,以我经验数据库和服务器都无压力,只有带宽可能在这种访问量下造成瓶颈。你算下你一个页面所有资源的总大小乘以20是否超出你的带宽。
影响网站访问速度的因素很多,比如数据库压力,服务器压力,带宽压力等,如果是你标题说的每秒万次PV,那我前面说的随便哪个都不是一台服务器能承受的,你必须做服务器集群了。如果是你后面说每秒20次,以我经验数据库和服务器都无压力,只有带宽可能在这种访问量下造成瓶颈。你算下你一个页面所有资源的总大小乘以20是否超出你的带宽。
目前发现 是缓存文件数量过大, 导致每次访问调用缓存文件,占用资源,,
希望高手 解答,重金相谢!!
影响网站访问速度的因素很多,比如数据库压力,服务器压力,带宽压力等,如果是你标题说的每秒万次PV,那我前面说的随便哪个都不是一台服务器能承受的,你必须做服务器集群了。如果是你后面说每秒20次,以我经验数据库和服务器都无压力,只有带宽可能在这种访问量下造成瓶颈。你算下你一个页面所有资源的总大小乘以20是否超出你的带宽。
目前发现 是缓存文件数量过大, 导致每次访问调用缓存文件,占用资源,,
希望高手 解答,重金相谢!!
freemaker 搞成静态的网页

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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