CentOS builds dynamic caching and static resource optimization of web servers

CentOS builds dynamic caching and static resource optimization of web servers

With the development of the Internet, the number of visits to websites is increasing, and the performance optimization of web servers has become more and more important. This article will introduce how to build a web server on a CentOS server and optimize dynamic caching and static resources.

1. Install the Apache server

First, we need to install the Apache server. On CentOS, you can install it with the following command:

sudo yum install httpd

After the installation is completed, start the Apache server:

sudo systemctl start httpd

2. Dynamic cache optimization

Dynamic cache is a kind of A technology for caching frequently changing web page content on the server. By caching dynamic pages, the load on the server can be reduced and the page loading speed can be improved.

1. Install memcached

On CentOS, you can install memcached through the following command:

sudo yum install memcached

After the installation is complete, start memcached:

sudo systemctl start memcached

2. Configuring Apache and PHP

Open the Apache configuration file:

sudo vi /etc/httpd/conf/httpd.conf

Find the following line:

LoadModule expires_module modules/mod_expires.so

Replace the comment symbol "#" in front of it "Remove it to enable this module.

Then find the following line:

LoadModule headers_module modules/mod_headers.so

Similarly, remove the comment symbol "#" in front of it.

Save and exit the configuration file.

3. Configure memcached

Open the memcached configuration file:

sudo vi /etc/sysconfig/memcached

Find the following line:

PORT="11211"
USER="memcached"
MAXCONN="1024"
CACHESIZE="64"
OPTIONS=""

You can modify it according to actual needs parameters, then save and exit the configuration file.

4. Configure PHP extension

Install memcached PHP extension:

sudo yum install php-pecl-memcached

After the installation is complete, restart the Apache server:

sudo systemctl restart httpd

5. Using dynamic cache in PHP code

Using dynamic cache in PHP code can be achieved through the following code:

$memcached = new Memcached();
$memcached->addServer('localhost', 11211);
$data = $memcached->get('cached_data');

if (!$data) {
    // 从数据库或其他途径获取数据
    $data = getDataFromDatabase();

    // 将数据存入缓存
    $memcached->set('cached_data', $data, 3600);
}

// 使用数据进行页面渲染
renderPage($data);

6. Monitor the usage of dynamic cache

Install the memcached monitoring tool:

sudo yum install php-pecl-memcache

After the installation is completed, visit the following address in the browser to view the usage of dynamic cache:

http://your_server_ip/memcache.php

3. Static Resource Optimization

For the optimization of static resources (such as images, CSS and JavaScript files), there are the following common methods.

1. Enable Gzip compression

Open the Apache configuration file:

sudo vi /etc/httpd/conf/httpd.conf

Find the following line:

LoadModule deflate_module modules/mod_deflate.so

Replace the comment in front of it The symbol "#" is removed to indicate that the module is enabled.

Then find the following line:

#Insert filter
SetOutputFilter DEFLATE

Similarly, remove the comment symbol "#" in front of it. Save and exit the configuration file.

Restart the Apache server:

sudo systemctl restart httpd

2. Enable browser cache

Add the following code snippet to the Apache configuration file:

<IfModule mod_expires.c>
    ExpiresActive on
    ExpiresByType text/css "access plus 1 year"
    ExpiresByType application/javascript "access plus 1 year"
    ExpiresByType image/jpeg "access plus 1 year"
    ExpiresByType image/png "access plus 1 year"
</IfModule>

Save and exit the configuration file.

3. Use CDN to accelerate

CDN (Content Delivery Network) is a distributed server system that can distribute static resources to the server closest to the user, improving resources loading speed. You can use the following code snippet to convert the website's static resource references to CDN addresses:

<link rel="stylesheet" href="http://cdn.example.com/style.css">
<script src="http://cdn.example.com/script.js"></script>
<img  src="/static/imghwm/default1.png"  data-src="http://cdn.example.com/image.jpg"  class="lazy" alt="CentOS builds dynamic caching and static resource optimization of web servers" >

IV. Summary

This article introduces the establishment of a web server on a CentOS server, as well as the dynamic cache and static How to optimize resources. By properly configuring the server, caching dynamic pages, and compressing and caching static resources, the access speed of the website can be improved and the user experience can be improved. At the same time, using CDN acceleration can further improve the loading speed of resources. Hope this article is helpful to you.

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