Setup redis sessions for Magento 1

redis-sessions-magento.xml

<session_save>db</session_save>
<redis_session> 
    <host>redismaster</host>
    <port>6379</port>
    <password></password>
    <timeout>2.5</timeout>
    <persistent></persistent>
    <db>2</db>
    <compression_threshold>2048</compression_threshold>
    <compression_lib>gzip</compression_lib>
    <log_level>1</log_level>
    <max_concurrency>6</max_concurrency>
    <break_after_frontend>5</break_after_frontend>
    <fail_after>10</fail_after>
    <break_after_adminhtml>30</break_after_adminhtml>
    <first_lifetime>600</first_lifetime>
    <bot_first_lifetime>60</bot_first_lifetime>
    <bot_lifetime>7200</bot_lifetime>
    <disable_locking>0</disable_locking>
    <min_lifetime>60</min_lifetime>
    <max_lifetime>2592000</max_lifetime>
</redis_session>