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Large-Scale Distributed Systems

Large-Scale Distributed Systems. Bwin poker - a real world example. Henrik Lagercrantz Senior Systems Architect henrik.lagercrantz@bwin.org. Agenda. About bwin Games and online poker Challenges in a large-scale distributed system The P5 poker engine Q&A. bwin Games. Online gaming

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Large-Scale Distributed Systems

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  1. Large-Scale Distributed Systems Bwin poker - a real world example Henrik Lagercrantz Senior Systems Architect henrik.lagercrantz@bwin.org

  2. Agenda About bwin Games and online poker Challenges in a large-scale distributed system The P5 poker engine Q&A

  3. bwin Games Online gaming Subsidiary of bwin AG ~400 employees in Sthlm Focus on online poker

  4. Online Poker

  5. Some Numbers 14 million registered customers 45k players online at peak 800k player sessions per day 7 million poker rounds played per day 28 million poker hands dealt per day

  6. Complexity

  7. The Domain Model

  8. Handshake Quiz … Request req = awaitRequest() boolean auth = authenticate(req) if (auth) send(new LoginOk()) activateEncryption() else send(new LoginFailed()) … The Client The Server … send(new LoginRequest(“apa”)) LoginResponse resp = awaitResponse() if (isLoginOk(resp)) activateEncryption() send(new Message(“hello!”)) else print(“doh!”) … What’s wrong with this code?

  9. Requirements • Handle 100k concurrent players • 99.9% availability • Wide range of integration scenarios • Operator diversification • High security standards • Support regulatory constraints • Highly maintainable • …

  10. CAP Theorem • Consistency • Availability • Partition-tolerance

  11. Functional Decomposition

  12. Start decomposing… • Find a table • View ongoing games • Play poker • Chat • Process completed rounds • Route client/server communication • Register for a tournament • Create & schedule a new tournament • …

  13. P5 System Overview

  14. History Service Example

  15. Q&A

  16. Summary • Differentiate between essential complexity and accidental complexity! • Understand the problem domain • CAP theorem – “it’s a trade-off” • Functional decomposition is key!

  17. http://bwingames.se For questions regarding internship, thesis work, etc, contact Jonas Rundberg -jonas.rundberg@bwin.org Also feel free to send me (Henrik) email if you have any questions/thoughts/ideas around the technical stuff – henrik.lagercrantz@bwin.org Henrik Lagercrantz Senior Systems Architect henrik.lagercrantz@bwin.org

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