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Scaling mondrian

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Scaling mondrian

  1. 1. Scaling Mondrian From Big Data to Ludicrous Data
  2. 2. First challenge: The size of the data
  3. 3. Second challenge: Updating the data Nothing fancy here. - Apply deltas on cache - Programmatic roles
  4. 4. Third challenge: Scalability Synchronize without locks and blocks
  5. 5. Third challenge: Scalability In-memory rollups Gender Country Sales M USA 7 M CANADA 8 F USA 4 F CANADA 2 Country Sales USA 11 CANADA 10
  6. 6. Third challenge: Scalability Indexing problem - Rollups are a combinatory problem with exponential growth of complexity - Huge caches of segments. - O(n) isn't good enough.
  7. 7. Third challenge: Scalability Indexing solution - The PartiallyOrderedSet. A hierarchical java.util.Set implementation where elements might or might not be related to one another.
  8. 8. Third challenge: Scalability Non collapsed snowflaked aggregates - Join at any point in a snowflake dimension
  9. 9. Resources Press release http://www.informationweek.com/development/database/yahoo-and-hadoop-in-it-for-the-long-term/240002133

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