# vim app/etc/modules/Cm_RedisSession.xml
<active>true</active>Copy the necessary codes from app/etc/local.xml.additional to app/etc/local.xml:
Put the following code inside <global> </global>.
# vim app/etc/local.xml
<!-- example of redis cache -->
<cache>
<backend>Mage_Cache_Backend_Redis</backend>
<backend_options>
<server>127.0.0.1</server> <!-- or absolute path to unix socket for better performance -->
<port>6379</port>
<database>0</database>
<password></password>
<force_standalone>0</force_standalone> <!-- 0 for phpredis, 1 for standalone PHP -->
<connect_retries>1</connect_retries> <!-- Reduces errors due to random connection failures -->
<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 and snappy -->
<persistent>1</persistent> <!-- persistence value, 0: not in use, > 0 used as persistence ID -->
</backend_options>
</cache>
<!-- example of redis full page cache -->
<full_page_cache>
<backend>Mage_Cache_Backend_Redis</backend>
<backend_options>
<server>127.0.0.1</server> <!-- or absolute path to unix socket for better performance -->
<port>6379</port>
<database>1</database>
<password></password>
<force_standalone>0</force_standalone> <!-- 0 for phpredis, 1 for standalone PHP -->
<connect_retries>1</connect_retries> <!-- Reduces errors due to random connection failures -->
<automatic_cleaning_factor>0</automatic_cleaning_factor> <!-- Disabled by default -->
<!-- in FPC data is already gzipped, no need to do this twice -->
<compress_data>0</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 and snappy -->
<lifetimelimit>43200</lifetimelimit> <!-- set lifetime for keys without TTL -->
<persistent>2</persistent>
</backend_options>
</full_page_cache>
<!-- example of redis session storage -->
<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 Redis server requires authentication -->
<timeout>2.5</timeout> <!-- This is the Redis 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 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 -->
<break_after_adminhtml>30</break_after_adminhtml>
<bot_lifetime>7200</bot_lifetime> <!-- Bots get shorter session lifetimes. 0 to disable -->
</redis_session>Redis support across different Magento versions
Magento CE >= 1.7.0.0 and < 1.8.0.0
- Session storage – not included
- Cache backend – not included, after installation available as Cm_Cache_Backend_Redis
Magento CE >= 1.8.0.0
- Session storage – included
- Cache backend – included, available as Mage_Cache_Backend_Redis
Note: make sure you do change:
From:
<backend>Cm_Cache_Backend_Redis</backend>To:
<backend>Mage_Cache_Backend_Redis</backend>Note: make sure you do change the value of the following tag inside <redis_session> tag:
From:
<db>0</db>To:
<db>2</db># semanage boolean -l | grep httpd_can_network
To allow Apache to connect to the Redis server by enabling all ports:
# setsebool -P httpd_can_network_connect 1
Note: If you have turned on Security-Enhanced Linux (SELinux), httpd scripts by default are not allowed to connect out to the network.
After enabling Redis as cache backend, var/cache directory of your Magento installation can be emptied and should stay empty:
# rm -rf /var/www/html/magento19/var/cache
# ls /var/www/html/magento19/var/cache
Or Log in to the Admin Panel as an administrator. Click System > Cache Management > click Flush Magento Cache at the top of the page.
Run the redis command line tool:
# redis-cli
127.0.0.1:6379> info keyspace
127.0.0.1:6379> select 0
127.0.0.1:6379> keys *
127.0.0.1:6379> flushdb
127.0.0.1:6379> keys *Some of the commands you’ll be using most of the time are definitely:
- FLUSHALL – clear all databases
- SELECT # – select database under index #
- FLUSHDB – empty currently selected database
- KEYS * – list all keys from currently selected
Reference:
http://inchoo.net/magento/using-redis-cache-backend-and-session-storage-in-magento/
http://www.magentocommerce.com/knowledge-base/entry/redis-magento-ce-ee
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