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Qcon London 2015: Building the Halo 4 Services with Orleans
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Caitie McCaffrey
March 05, 2015
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Qcon London 2015: Building the Halo 4 Services with Orleans
Caitie McCaffrey
March 05, 2015
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Transcript
Building the Halo 4 Services with Orleans Qcon London 2015
Caitie McCaffrey! Distributed Systems Engineer @Caitie CaitieM.com
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Presence Statistics Title Files Cheat Detection User Generated Content
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Halo:CE - 6.43 million Halo 2 - 8.49 million Halo
3 - 11.87 million Halo 3: ODST - 6.22 million Halo Reach - 9.52 million
$220 million in sales ! 1 million players online Day
One
$300 million in sales ! 4 million players online !
31.4 million hours Week One
11.6 million players ! 1.5 billion games ! 270 million
hours Overall
Architectural Challenges
Load Patterns Load Patterns
Azure Worker Roles Azure Table Azure Blob Azure Service Bus
Always Available
Low Latency & High Concurrency
Stateless 3 Tier ! Architecture
Latency Issues
Add A Cache
Concurrency Issues
Data Locality
The Actor Model A framework & basis for reasoning about
concurrency A Universal Modular Actor Formalism for Artificial Intelligence ! Carl Hewitt, Peter Bishop, Richard Steiger (1973)
Send A Message Create a New Actor Change Internal State
State-full Services
Philip A. Bernstein, Sergey Bykov, Alan Geller, Gabriel Kliot, Jorgen
Thelin Orleans: Distributed Virtual Actors for Programmability and Scalability eXtreme Computing Group MSR
“Orleans is a runtime and programming model for building distributed
systems, based on the actor model”
Virtual Actors “An Orleans actor always exists, virtually. It cannot
be explicitly created or destroyed”
Virtual Actors • Perpetual Existence • Automatic Instantiation • Location
Transparency • Automatic Scale out
Runtime • Messaging • Hosting • Execution
Messaging Guarantees
Let’s Talk About CAP
Orleans is AP
Programming Model • .NET Framework! • Actor Interfaces! • Promises!
• Actor References • Turns • Persistence
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Programming Model • .NET Framework • Actor Interfaces • Promises
• Actor References! • Turns • Persistence
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Programming Model • .NET Framework • Actor Interfaces • Promises
• Actor References • Turns! • Persistence
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Reliability “Orleans manages all aspects of reliability automatically”
TOO!
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TOO!
TOO!
Orleans & Halo
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Halo 4: Statistics Service
Player Grain
Game Grain
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Performance & Scalability
“Orleans applications run at very high CPU Utilization. We have
run load tests with full saturation of 25 servers for many days at 90%+ CPU utilization without any instability”
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Programmer Productivity & Performance
Get Orleans https://github.com/dotnet/orleans!
Questions @Caitie