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AWS lambda - Coggle Diagram

- - - - aws lambda invoke ... --invocation-type Event
- - - - encrypt must use KMS key
    - - init db outside handler
- - - - AuthType AWS_IAM: authen & authorize req
- - - - statusCode, body & isBase64Encoded
- - - - default: LOG_ERROR
- - - - 1 event source - shard
      - processed item not removed
      - <= 10 batch / shard parallel
      - error handle
        
        default: 1 error / entire reprocessed
        
        can config: discard -> dest, restrict retry, split on error
    - - long polling
      - batch size: 1 - 10
      - should: visibility timeout = 6x timeout lambda
      - DLQ (setting up in SQS NOT lambda)
      - scaling up to number of active message group
  - - - 1 lambda / shard
      - parallel: <= 10 batch / shard
    - - lambda add: >= 60 instance / minute
      - parallel: <= 1000 batches message parallel
    - - scaling up to number of active message group
      - same GroupID -> in order
- - - - sqs (option: DLQ)
      - sns
- - - - cache key normalization
      - change header
      - rewrite redirect
      - request auth & authorize
  - - - network & filesystem access
      - 3rd lib
      - long time & cpu & mem
- - - - compresss: 50Mb
      - uncompressed: 250Mb