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From Apache Wiki <>
Subject [Solr Wiki] Trivial Update of "NewSolrCloudDesign" by YonikSeeley
Date Thu, 18 Aug 2011 15:53:18 GMT
Dear Wiki user,

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The "NewSolrCloudDesign" page has been changed by YonikSeeley:

  (hash(user_id)<<24) | (hash(message_id)>>>8)
  By deriving the top 8 bits of the hashcode from the user_id, it guarantees that any users
emails are in the same 256th portion of the cluster.  At search time, this information can
be used to only query that portion of the cluster.
+ We probably also want to view the hash space as a ring (as is done with consistent hashing)
in order to express ranges that wrap (cross from the maximum value to the minimum value).
  == Shard Assignment ==

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