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Home Backend Development PHP Tutorial Detailed explanation of php distributed deployment examples

Detailed explanation of php distributed deployment examples

Mar 12, 2018 am 11:29 AM
php distributed Detailed explanation

In ordinary Web development, the common mode is that after the user logs in, the login status information is stored in the Session, some of the user's commonly used hot data is stored in the file cache, and the attachment information uploaded by the user is stored in a directory on the Web server. . This method is very convenient to use and fully capable for general Web applications. But for high-concurrency enterprise-level websites, it cannot handle it. Web clusters need to be used to achieve load balancing.

After deploying using the Web cluster method, the first thing to adjust is the user status information and attachment information. User status can no longer be saved to the Session, the cache cannot use the file cache of the local Web server, and attachments cannot be saved on the Web server. Because it is necessary to ensure that the status of each web server in the cluster is completely consistent. Therefore, user status, cache, etc. need to be saved to a dedicated cache server, such as Memcache. Attachments need to be saved to cloud storage, such as Qiniu Cloud Storage, Alibaba Cloud Storage, Tencent Cloud Storage, etc.

This article takes the ThinkPHP development framework as an example to explain how to set up and save Session, cache, etc. to the Memcache cache server.

Download the cached Memcache processing class and place it in the Thinkphp\Extend\Driver\Cache directory; download the Session Memcache processing class and place it in the Thinkphp\Extend\Driver\Session directory. As shown in the figure below:


Modify the configuration file, adjust the Session and cache, and record them to the Memcache server. Open ThinkPHP\Conf\convention.PHP, add configuration items:

  1. /* Memcache緩存設(shè)置 */  
    'MEMCACHE_HOST'         => '192.168.202.20',  
    'MEMCACHE_PORT'         => 11211,

Modify the data cache to Memcache:

'DATA_CACHE_TYPE'
       => 
'Memcache'
,


Modify Session to Memcache:

  1. 'SESSION_TYPE'          => 'Memcache',

As shown below:


Because there are many types of cloud storage, attachments are stored on cloud storage, so I won’t go into details. Just parameterize the SDK provided by each cloud storage. After the above modifications, the Web server can be deployed in a distributed manner.

Attachment 1: CacheMemcache.class.php

<?php  
// +----------------------------------------------------------------------  
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]  
// +----------------------------------------------------------------------  
// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.  
// +----------------------------------------------------------------------  
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )  
// +----------------------------------------------------------------------  
// | Author: liu21st <liu21st@gmail.com>  
// +----------------------------------------------------------------------  
  
defined(&#39;THINK_PATH&#39;) or exit();  
/** 
 * Memcache緩存驅(qū)動 
 * @category   Extend 
 * @package  Extend 
 * @subpackage  Driver.Cache 
 * @author    liu21st <liu21st@gmail.com> 
 */  
class CacheMemcache extends Cache {  
  
    /** 
     * 架構(gòu)函數(shù) 
     * @param array $options 緩存參數(shù) 
     * @access public 
     */  
    function __construct($options=array()) {  
        if ( !extension_loaded(&#39;memcache&#39;) ) {  
            throw_exception(L(&#39;_NOT_SUPPERT_&#39;).&#39;:memcache&#39;);  
        }  
  
        $options = array_merge(array (  
            &#39;host&#39;        =>  C(&#39;MEMCACHE_HOST&#39;) ? C(&#39;MEMCACHE_HOST&#39;) : &#39;127.0.0.1&#39;,  
            &#39;port&#39;        =>  C(&#39;MEMCACHE_PORT&#39;) ? C(&#39;MEMCACHE_PORT&#39;) : 11211,  
            &#39;timeout&#39;     =>  C(&#39;DATA_CACHE_TIMEOUT&#39;) ? C(&#39;DATA_CACHE_TIMEOUT&#39;) : false,  
            &#39;persistent&#39;  =>  false,  
        ),$options);  
  
        $this->options      =   $options;  
        $this->options[&#39;expire&#39;] =  isset($options[&#39;expire&#39;])?  $options[&#39;expire&#39;]  :   C(&#39;DATA_CACHE_TIME&#39;);  
        $this->options[&#39;prefix&#39;] =  isset($options[&#39;prefix&#39;])?  $options[&#39;prefix&#39;]  :   C(&#39;DATA_CACHE_PREFIX&#39;);          
        $this->options[&#39;length&#39;] =  isset($options[&#39;length&#39;])?  $options[&#39;length&#39;]  :   0;          
        $func               =   $options[&#39;persistent&#39;] ? &#39;pconnect&#39; : &#39;connect&#39;;  
        $this->handler      =   new Memcache;  
        $options[&#39;timeout&#39;] === false ?  
            $this->handler->$func($options[&#39;host&#39;], $options[&#39;port&#39;]) :  
            $this->handler->$func($options[&#39;host&#39;], $options[&#39;port&#39;], $options[&#39;timeout&#39;]);  
    }  
  
    /** 
     * 讀取緩存 
     * @access public 
     * @param string $name 緩存變量名 
     * @return mixed 
     */  
    public function get($name) {  
        N(&#39;cache_read&#39;,1);  
        return $this->handler->get($this->options[&#39;prefix&#39;].$name);  
    }  
  
    /** 
     * 寫入緩存 
     * @access public 
     * @param string $name 緩存變量名 
     * @param mixed $value  存儲數(shù)據(jù) 
     * @param integer $expire  有效時(shí)間(秒) 
     * @return boolen 
     */  
    public function set($name, $value, $expire = null) {  
        N(&#39;cache_write&#39;,1);  
        if(is_null($expire)) {  
            $expire  =  $this->options[&#39;expire&#39;];  
        }  
        $name   =   $this->options[&#39;prefix&#39;].$name;  
        if($this->handler->set($name, $value, 0, $expire)) {  
            if($this->options[&#39;length&#39;]>0) {  
                // 記錄緩存隊(duì)列  
                $this->queue($name);  
            }  
            return true;  
        }  
        return false;  
    }  
  
    /** 
     * 刪除緩存 
     * @access public 
     * @param string $name 緩存變量名 
     * @return boolen 
     */  
    public function rm($name, $ttl = false) {  
        $name   =   $this->options[&#39;prefix&#39;].$name;  
        return $ttl === false ?  
            $this->handler->delete($name) :  
            $this->handler->delete($name, $ttl);  
    }  
  
    /** 
     * 清除緩存 
     * @access public 
     * @return boolen 
     */  
    public function clear() {  
        return $this->handler->flush();  
    }  
}

# Attachment 2: SessionMemcache.class.php

    <?php   
    // +----------------------------------------------------------------------  
    // |   
    // +----------------------------------------------------------------------  
    // | Copyright (c) 2013-   
    // +----------------------------------------------------------------------  
    // | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )  
    // +----------------------------------------------------------------------  
    // | Author: richievoe <richievoe@163.com>  
    // +----------------------------------------------------------------------  
        /** 
         * 自定義Memcache來保存session 
         */  
    Class SessionMemcache{  
        //memcache對象  
        private $mem;  
        //SESSION有效時(shí)間  
        private $expire;  
        //外部調(diào)用的函數(shù)  
        public function execute(){  
            session_set_save_handler(  
                array(&$this,&#39;open&#39;),   
                array(&$this,&#39;close&#39;),   
                array(&$this,&#39;read&#39;),   
                array(&$this,&#39;write&#39;),   
                array(&$this,&#39;destroy&#39;),   
                array(&$this,&#39;gc&#39;)  
                );  
        }  
        //連接memcached和初始化一些數(shù)據(jù)  
        public function open($path,$name){  
            $this->expire = C(&#39;SESSION_EXPIRE&#39;) ? C(&#39;SESSION_EXPIRE&#39;) :ini_get(&#39;session.gc_maxlifetime&#39;);  
            $this->mem = new Memcache;  
            return $this->mem->connect(C(&#39;MEMCACHE_HOST&#39;), C(&#39;MEMCACHE_PORT&#39;));  
        }  
        //關(guān)閉memcache服務(wù)器  
        public function close(){  
            return $this->mem->close();  
        }  
        //讀取數(shù)據(jù)  
        public function read($id){  
            $id = C(&#39;SESSION_PREFIX&#39;).$id;  
            $data = $this->mem->get($id);  
            return $data ? $data :&#39;&#39;;  
        }  
        //存入數(shù)據(jù)  
        public function write($id,$data){  
            $id = C(&#39;SESSION_PREFIX&#39;).$id;  
            //$data = addslashes($data);  
            return $this->mem->set($id,$data,0,$this->expire);  
        }  
        //銷毀數(shù)據(jù)  
        public function destroy($id){  
            $id = C(&#39;SESSION_PREFIX&#39;).$id;  
            return $this->mem->delete($id);  
        }  
        //垃圾銷毀  
        public function gc(){  
            return true;  
        }  
    }  
    ?>
Related recommendations:

Detailed explanation of distributed deployment examples for ThinkPHP projects

hadoop 2.6.0 Pseudo-distributed deployment installation example tutorial

PHP extended Memcache distributed deployment solution_PHP

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