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Anti-Caching in Main Memory Database Systems

Anti-Caching in Main Memory Database Systems. Justin DeBrabant Brown University debrabant@cs.brown.edu. A bit of history…. 1974 – System R. query optimization recovery transaction serialization lots of locks. Application. Buffer Pool. Primary Storage. Change is Good.

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Anti-Caching in Main Memory Database Systems

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  1. Anti-Caching in Main Memory Database Systems Justin DeBrabant Brown University debrabant@cs.brown.edu

  2. A bit of history…

  3. 1974 – System R • query optimization • recovery • transaction serialization • lots of locks

  4. Application Buffer Pool Primary Storage

  5. Change is Good source: http://www.archivebuilders.com/whitepapers/22045p.pdf

  6. Great, that’s what the buffer pool is for...right?

  7. OLTP Through the Looking Glass, and What We Found ThereSIGMOD ‘08, pp. 981-992, 2008.

  8. What to do with all this memory? Application Consistent? Updates? Writes?

  9. Parallel Main Memory Transaction Processing System H-Store: A High-Performance, DistributedMain Memory Transaction Processing SystemVLDB 2008.

  10. YCSB, Update-Heavy, data < memory

  11. < >

  12. Anti-Caching in H-Store • Memory becomes primary storage for “hot” data • “Cold” data is evicted to disk in blocks, fetched when requested by a transaction • Still no locks/latches

  13. Application Primary Storage Anti-Cache

  14. YCSB, Update-Heavy, data > memory 15x

  15. The New Traditional Wisdom > + Anti- Caching + Buffer Pool

  16. Future Work • Alternative eviction strategies • Larger-than-memory queries • New hardware • flash, persistent memory

  17. The Team Justin DeBrabant (Brown) AndyPavlo (Brown) StephenTu (MIT) MikeStonebraker (MIT) StanZdonik (Brown) Anti-Caching: A New Approach to Database Management System Architecture In Preparation.

  18. Questions? debrabant@cs.brown.eduhstore.cs.brown.edu

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