The document outlines key principles and patterns in serverless architecture, emphasizing the use of stateless functions and various architectural patterns for different use cases. It describes patterns like messaging and command, fan out, and pipes and filter for managing tasks and services. Additionally, it references AWS and Azure function examples that demonstrate practical applications of these principles.

1. CodeOps Technologies
Serverless Architecture
Patterns
Manoj Ganapathi
Chief Architect, CodeOps
manoj@codeops.tech
@manojgr

2. Serverless: Core Principles
❖ Functions are the unit of deployment and scale
❖ Use Serverless to solve specific problems, not every application can
be written as Serverless.
❖ Keep your functions Stateless – use cloud storage for WIP state
❖ Functions should:
❖ “Do One Thing”– Single Responsibility Principle
❖ Be Idempotent
❖ Finish as fast as possible
“Rethink your application as an orchestra of
autonomous functions”

3. Architectures
•Compute as a
Backend
•Real-time
Processing
•Compute as a glue
•Hybrid
•Proxy
Use Cases
•App Backend
•Data Pipelines
•Bots and Skills
•Legacy API Proxy
•Scheduled/Event
Driven services
•Stream Processing
Patterns
•Messaging
•Command
•Pipes and Filter
•Fan Out
•Priority Queue
Reference: Serverless Architectures on AWS

4. Key Patterns

5. Messaging and Command
• Decouple services by introducing a queue
• Typically in asynchronous messaging in web apps and services to take the
load off the application
• Also shows the Command pattern (encapsulated implementation for a
standard interface)
Reference: Serverless Architectures on AWS

6. Fan Out
• Topic-Subscription scenario.
• For e.g: Once a video is uploaded, you may want to encode them in
multiple formats in parallel and also transcribe
Reference: Serverless Architectures on AWS

7. Pipes and Filter
• To manage a sequential series of tasks – like a data pipeline
• Functions can work as a pipe (connector) or a filter (transformation)
Reference: Serverless Architectures on AWS

8. Appendix AWS Lambda and Azure
Functions examples

9. AWS: Web Applications
https://www.slideshare.net/AmazonWebServices/aws-reinvent-2016-serverless-
architectural-patterns-and-best-practices-arc402

10. AWS: Batch Processing
https://www.slideshare.net/AmazonWebServices/aws-reinvent-2016-serverless-
architectural-patterns-and-best-practices-arc402

11. AWS: Stream Processing
https://www.slideshare.net/AmazonWebServices/aws-reinvent-2016-serverless-
architectural-patterns-and-best-practices-arc402

12. Azure Functions: Stream Processing
https://www.slideshare.net/satonaoki/serverless-patterns-with-azure-functions

13. Azure Functions: Managing Dialog
responses in Chatbots
https://www.slideshare.net/satonaoki/serverless-patterns-with-azure-functions

14. Azure Functions: Integration and Web
API
https://www.slideshare.net/ServerlessConf/chris-anderson-and-yochay-
kiriaty-serverless-patterns-with-azure-functions

15. AWS: Event Driven Automation
https://www.slideshare.net/AmazonWebServices/aws-reinvent-2016-serverless-
architectural-patterns-and-best-practices-arc402

16. Azure Functions: Service Event
Processing
https://www.slideshare.net/satonaoki/serverless-patterns-with-azure-functions