Magento 1.9.x配置Redis缓存 - 做SEO的邮差

Magento借助Zend框架支持许多后端缓存。Memcache和APC是常用的。但是，Redis迅速成为Magento和其他Web应用程序的流行且功能强大的缓存系统。

Redis是开源的，BSD许可的高级键值存储，可以选择在Magento中用于后端和会话存储。它可用于缓存数据库，从而减少了对数据库资源的利用，并提供了可调整的持久性缓存。它是memcacheD的一个很好的选择。

首次加载页面时，将在服务器上查询数据库。Redis缓存查询。下次其他用户加载页面时，结果将从Redis提供，而无需查询实际数据库。它实现了一个持久的对象缓存（没有过期）。对象缓存通过在加载网页所需的内存中缓存SQL查询来工作。当主数据库服务器的数据更新时，redis中的对应密钥将失效。因此，它提供了更新的数据，而不是缓存数据。如果redis中没有可用的查询，则数据库将提供结果，并将结果添加到其缓存中。

因此，让我们开始安装它并为Magento配置它。

更新并安装redis-server。

sudo su
 
apt-get update
 
apt-get install redis-server

配置Magento，

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nano /<magento-root-directory>/app/etc/modules/Cm_RedisSession.xml

要启用该模块，请编辑

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<config>
  <modules>
    <Cm_RedisSession>
      <active>false</active>
      <codePool>community</codePool>
    </Cm_RedisSession>
  </modules>
</config>
 
 

到

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<config>
  <modules>
    <Cm_RedisSession>
      <active>true</active>
      <codePool>community</codePool>
    </Cm_RedisSession>
  </modules>
</config>
 
 

然后，编辑位于magento目录中的“ local.xml”文件。

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nano /magento-root-dirrectory/app/etc/local.xml

改变

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<?xml version="1.0"?>
 
<config>
    <global>
        <install>
            <date><![CDATA[Tue, 04 Oct 2016 09:53:37 +0000]]></date>
        </install>
        <crypt>
            <key><![CDATA[e972f3c4e8436052de805bdf1f40de0f]]></key>
        </crypt>
        <disable_local_modules>false</disable_local_modules>
        <resources>
            <db>
                <table_prefix><![CDATA[]]></table_prefix>
            </db>
            <default_setup>
                <connection>
                    <host><![CDATA[localhost]]></host>
                    <username><![CDATA[magento]]></username>
                    <password><![CDATA[magento]]></password>
                    <dbname><![CDATA[magento]]></dbname>
                    <initStatements><![CDATA[SET NAMES utf8]]></initStatements>
                    <model><![CDATA[mysql4]]></model>
                    <type><![CDATA[pdo_mysql]]></type>
                    <pdoType><![CDATA[]]></pdoType>
                    <active>1</active>
                </connection>
 </default_setup>
        </resources>
        <session_save><![CDATA[files]]></session_save>
    </global>
    <admin>
        <routers>
            <adminhtml>
                <args>
                    <frontName><![CDATA[admin]]></frontName>
                </args>
            </adminhtml>
        </routers>
    </admin>
</config>
 

到

<?xml version="1.0"?>
<config>
    <global>
        <install>
            <date><![CDATA[Tue, 04 Oct 2016 09:53:37 +0000]]></date>
        </install>
        <crypt>
            <key><![CDATA[e972f3c4e8436052de805bdf1f40de0f]]></key>
        </crypt>
        <disable_local_modules>false</disable_local_modules>
        <resources>
            <db>
                <table_prefix><![CDATA[]]></table_prefix>
            </db>
            <default_setup>
                <connection>
                    <host><![CDATA[localhost]]></host>
                    <username><![CDATA[magento]]></username>
                    <password><![CDATA[magento]]></password>
                    <dbname><![CDATA[magento]]></dbname>
                    <initStatements><![CDATA[SET NAMES utf8]]></initStatements>
                    <model><![CDATA[mysql4]]></model>
                    <type><![CDATA[pdo_mysql]]></type>
                    <pdoType><![CDATA[]]></pdoType>
                    <active>1</active>
                </connection>
 </default_setup>
        </resources>
 
<!-- This is a child node of config/global -->
<cache>
  <backend>Cm_Cache_Backend_Redis</backend>
  <backend_options>
    <server>127.0.0.1</server> <!-- or absolute path to unix socket -->
    <port>6379</port>
    <persistent></persistent> <!-- Specify unique string to enable persistent connections. E.g.: sess-db0; bugs with phpredis and php-fpm are known: https://github.com/nicolasff/phpredis/issues/70 -->
    <database>0</database> <!-- Redis database number; protection against accidental data loss is improved by not sharing databases -->
    <password></password> <!-- Specify if your server requires authentication -->
    <force_standalone>0</force_standalone>  <!-- 0 for phpredis, 1 for standalone PHP -->
    <connect_retries>1</connect_retries>    <!-- Reduces errors due to random connection failures; a value of 1 will not retry after the first failure -->
    <read_timeout>10</read_timeout>         <!-- Set read timeout duration; phpredis does not currently support setting read timeouts -->
    <automatic_cleaning_factor>0</automatic_cleaning_factor> <!-- Disabled by default -->
    <compress_data>1</compress_data>  <!-- 0-9 for compression level, recommended: 0 or 1 -->
    <compress_tags>1</compress_tags>  <!-- 0-9 for compression level, recommended: 0 or 1 -->
    <compress_threshold>20480</compress_threshold>  <!-- Strings below this size will not be compressed -->
    <compression_lib>gzip</compression_lib> <!-- Supports gzip, lzf, lz4 (as l4z) and snappy -->
    <use_lua>0</use_lua> <!-- Set to 1 if Lua scripts should be used for some operations -->
  </backend_options>
</cache>
        <!--session_save><![CDATA[files]]></session_save-->
 
<session_save>db</session_save>
        <redis_session>                       <!-- All options seen here are the defaults -->
            <host>127.0.0.1</host>            <!-- Specify an absolute path if using a unix socket -->
            <port>6379</port>
            <password></password>             <!-- Specify if your server requires authentication -->
            <timeout>2.5</timeout>            <!-- This is the connection timeout, not the locking timeout -->
            <persistent></persistent>         <!-- Specify unique string to enable persistent connections. E.g.: sess-db0; bugs with phpredis and php-fpm are known: https://github.com/nicolasff/phpredis/issues/70 -->
            <db>0</db>                        <!-- Redis database number; protection from accidental loss is improved by using a unique DB number for sessions -->
            <compression_threshold>2048</compression_threshold>  <!-- Set to 0 to disable compression (recommended when suhosin.session.encrypt=on); known bug with strings over 64k: https://github.com/colinmollenhour/Cm_Cache_Backend_Redis/issues/18 -->
            <compression_lib>gzip</compression_lib>              <!-- gzip, lzf, lz4 or snappy -->
            <log_level>1</log_level>               <!-- 0 (emergency: system is unusable), 4 (warning; additional information, recommended), 5 (notice: normal but significant condition), 6 (info: informational messages), 7 (debug: the most information for development/testing) -->
            <max_concurrency>6</max_concurrency>                 <!-- maximum number of processes that can wait for a lock on one session; for large production clusters, set this to at least 10% of the number of PHP processes -->
            <break_after_frontend>5</break_after_frontend>       <!-- seconds to wait for a session lock in the frontend; not as critical as admin -->
            <fail_after>10</fail_after>                          <!-- seconds after which we bail from attempting to obtain lock (in addition to break after time) -->
            <break_after_adminhtml>30</break_after_adminhtml>
            <first_lifetime>600</first_lifetime>                 <!-- Lifetime of session for non-bots on the first write. 0 to disable -->
            <bot_first_lifetime>60</bot_first_lifetime>          <!-- Lifetime of session for bots on the first write. 0 to disable -->
            <bot_lifetime>7200</bot_lifetime>                    <!-- Lifetime of session for bots on subsequent writes. 0 to disable -->
            <disable_locking>0</disable_locking>                 <!-- Disable session locking entirely. -->
            <min_lifetime>60</min_lifetime>                      <!-- Set the minimum session lifetime -->
            <max_lifetime>2592000</max_lifetime>                 <!-- Set the maximum session lifetime -->
        </redis_session>
    </global>
    <admin>
        <routers>
            <adminhtml>
                <args>
                    <frontName><![CDATA[admin]]></frontName>
                </args>
            </adminhtml>
        </routers>
    </admin>
</config>

清除所有缓存和会话：

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rm -rf /var/www/html/magento/var/session/*
 
rm -rf /var/www/html/magento/var/cache/*

或者，以管理员身份登录到“管理”面板，

系统>缓存管理，

然后，点击“刷新Magento缓存”。

现在，重新启动为

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service redis-server restart

要检查Redis服务器是否正常工作，请输入

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redis-cli ping
 

如果结果是，

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PONG

然后您的服务器正在响应。

您还可以通过以下方式监控所有流量：

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redis-cli monitor

然后刷新页面。如果您看到终端上生成的日志包含随机的字母数字字符，则表示缓存正在运行。

您还可以检查Redis服务器是否能够设置密钥，

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redis-cli
 
127.0.0.1:6379> set mykey KEY
OK
127.0.0.1:6379> get mykey
"KEY"
127.0.0.1:6379> exit
 

您还可以使用“ info”命令来获取有关服务器的信息和统计信息，例如，

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redis-cli info