⚡ Lambda Serverless - Advanced

Lambda Layers

# Create layer with dependencies
zip -r lambda-layer.zip nodejs/node_modules

aws lambda publish-layer-version \
  --layer-name dependencies \
  --zip-file fileb://lambda-layer.zip \
  --compatible-runtimes nodejs18.x

Concurrency Control

# Set reserved concurrency
aws lambda put-function-concurrency \
  --function-name myFunction \
  --reserved-concurrent-executions 100

# Set provisioned concurrency
aws lambda put-provisioned-concurrency-config \
  --function-name myFunction \
  --provisioned-concurrent-executions 50

Async Processing

// Async patterns with SQS
exports.handler = async (event) => {
  for (const record of event.Records) {
    await sqs.sendMessage({
      QueueUrl: process.env.QUEUE_URL,
      MessageBody: JSON.stringify(record)
    }).promise();
  }
};

Key Takeaways

• **Layers** simplify dependency management

• **Concurrency** controls cost and performance

• **Async** enables scalable patterns

• **Optimization** reduces cold starts

Next Steps

Explore advanced storage and caching patterns.