title: Removing Redis Hash Key's field on LRU
body: <p>How can I set LRU on Redis which is not on instance level but on some particular.
  Let's say a hash.
  I am using hash-key as one cache bucket and field as key and value is value.
  So it is like :
     Redis;s key-field-value = type-key-field     for me.</p>
  
  <p>If it is not straight forward then I would like to use another DB Level LRU.
   ( One Redis instance have 16 DB, I would like to use DB 1 as LRU That means everything which goes in DB 1 will follows LRU, and which goes in DB-2,3... will not follow LRU ).</p>