Application Services

Application Services

1. SQS

   • Pull-based
   • Distributed message queue
   • Message 250 KB
   • Types
     • Standard - At least once, no order
     • FIFO - No duplicates, order arrived
   • Long polling
     • Saves money. Return response if in queue or tieout
   • Visibility Timeout
     • Message in queue after reader picks up. >1 delivery.
   • 1st AWS Service

2. SNS

   • Pub/Sub
   • Push-based
     • PAYG
   • Topics
     • Multitple end point types
   • Types
     • SMS, Email, SQS, HTTP

3. SWF

   • Max workflow = 1 year
   • Parts
     • Tasks
     • Worker
     • Decider
     • Brokers
   • Domain - isolate types and execution in account
   • Never duplicated
   • Tracks all tasks and events

4. API Gateway

   • Publish, maintain, monitor secure APIs
   • API Caching - endpoint response (TTL)
   • Throttle to prevent attacks
   • CORS
     • Resources from different domains

5. Elastic Transcoder

   • Media transcoder in cloud
     • Different formats. Has presets
   • Pay for minutes & resolution

6. Kinesis

   • Streaming data
   • Load & Analyse
   • Services
     • Streams
       • Shards. EC2 as consumers.
     • Firehose
       • Lambda to ElasticSearch cluster
     • Analytics
       • SQL on streams/shards