You can update your local.xml with the following for your backend cache
<config>
<global>
<!-- other configuration nodes -->
<cache>
<backend>CACHE_BACKEND_CLASS_NAME</backend>
<backend_options>
<server>127.0.0.1</server> <!-- or absolute path to unix socket -->
<port>6379</port>
<persistent></persistent> <!-- Specify a unique string like "cache-db0" to enable persistent connections. -->
<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 -->
<read_timeout>10</read_timeout> <!-- Set read timeout duration -->
<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 -->
</backend_options>
</cache>
<!-- other configuration nodes -->
</global>
</config>
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