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Cloud Save across Platforms & Devices

Peter Heinrich , Technical Evangelist. Cloud Save across Platforms & Devices. Games Services, Appstore for Android. Customer Experience. “ Put Buyers First? What a Concept” – Joe Nocera, New York Times.

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Cloud Save across Platforms & Devices

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  1. Peter Heinrich, Technical Evangelist Cloud Save across Platforms & Devices

  2. Games Services,Appstore for Android

  3. Customer Experience “Put Buyers First? What a Concept” – Joe Nocera, New York Times “Amazon.com Core Values: A Customer Experience Obsession” – Flavio Martins, WinTheCustomer! “If you do build a great experience, customers tell each other about that. Word of mouth is very powerful.” – Jeff Bezos “Amazon's obsession with customers pays off”– Matt Linderman, Signal vs. Noise

  4. Save Customer Game Data!

  5. Small $$$ Fragile Mobile Devices Easy to misplace or lose Often targeted for theft Easily damaged or broken

  6. Mobile + Cloud, BFFs DB

  7. ? ? ? Use Cases Get Complicated

  8. Real Money, Real Problems !

  9. Currency Is Tricky Don’t allow offline purchases Allow, but exclude consumables Support negative balances Even online devices need to coordinate balance updates between themselves

  10. Time Played across Devices 5 5+2 7+13 7 min 20 min 5 min 5 7 min 20

  11. Time Played across Devices 5 2 13 2 min 13 min 5 min min 5, 2, or 13? 13

  12. Time Played across Devices 5 2 13 2 min 13 min 5 min 5 7 min 20

  13. Running Totals Make each client a local authority Keep subtotals and combine them in the cloud Return total on demand Sending deltas in updates is not idempotent

  14. Other Game Data

  15. No Restrictions = Lots of Work Concurrency Control Sequence 2 1 3 1 3 2

  16. Mergeable Data Uses a simple rule for conflict resolution, based on the nature of the data: High Score – largest / biggest Best Time – lowest / fastest Last Monster – most recent

  17. Optimistic Locking • Save local timestamp or sequence # • Update local value • Retrieve remote timestamp / sequence # • If local > remote, push to cloud • Else, pull from cloud

  18. Conflict Resolution Model data with mergeable types Simple rules allow unattended conflict resolution Nature of data defines rule Common types: Highest / lowest number, most-recent string

  19. Whispersync for Games • Queues updates for offline operation • Automatically resolves conflicts between mobile devices and cloud • Lightweight API with fast integration Syncable Types: Number lowest, highest, most recent String most recent AccumulatingNumber running totals NumberList ascending, descending, latest StringList most recent StringSet Map

  20. Learn more: developer.amazon.com Contact us: forums.developer.amazon.com developer.amazon.com/help/contactus.html Follow us: @peterdotgames /AmazonAppstoreForAndroid developer.amazon.com/blog

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