php常用的缓存工具：memcached和redis,本文讲的是在magento框架中借助magento的模块来使用redis
- 准备工作
- magento中配置redis
- 可能遇到的问题
准备工作
确保你的电脑安装并启动了redis服务、配置了php的redis扩展
若没有，查看此文《mac下安装配置redis》
magento配置reids
确保magento框架中安装并启用了
Cm_Cache_Backend_Redis模块修改以下路径中的local配置文件
项目根目录/app/etc/local.xml
在config/global下添加子节点cache如下
<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 Redis 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>
- 清空magento缓存使得配置文件生效，关于如何清空magento缓存，参考《magento二次开发 - 如何清除magento缓存》
可能遇到的问题
6.22:
今天上午打开本地网站时报如下错误connection to Redis failed：
错误页面
发现是因为redis服务没有开启导致的，开启redis即可
说明magento在配置了redis之后那么要保持reids服务一直处于开启状态
参考：
[1]在magento中配置redis文档：
http://devdocs.magento.com/guides/m1x/ce18-ee113/using_redis.html
[2]Cm_Cache_Backend_Redis配置
https://github.com/colinmollenhour/Cm_Cache_Backend_Redis/blob/master/README.md
