BUILDING MULTIPLAYER GAME BACKEND WITH AKKA ON AWS LAMBDA
summary
Backend built with Scala and Akka on AWS Lambda, receiving WebSocket traffic via API Gateway, queuing messages into Kinesis data stream, and persisting state to DynamoDB; uses GraalVM native image plus a native-image agent (Docker) to generate reflection config. Cold starts drop from over a minute to about two seconds and JVM bundle shrinks from ~250 MB to a slim native binary. A Unity WebGL client connects; demo handles some load then fails, exposing scaling limits and the need for fan‑out processors.
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chapters (12)
- 0:00Multiplayer game backends on AWS Lambda
- 1:47Live demo and architecture
- 3:56AWS Lambda and API Gateway
- 5:42Infrastructure as code with CDK
- 7:48Scala challenges on AWS Lambda
- 9:58Optimizing Scala with GraalVM
- 14:14GraalVM config automation
- 16:24GraalVM Docker image for Lambda
- 18:10GraalVM trade-offs in Lambda
- 19:37Scaling with Kinesis and DynamoDB
- 20:20Summary
- 20:43Q&A
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