Serverless computing is a cloud computing execution model in which the cloud provider runs the server, and dynamically manages the allocation of machine resources. Pricing is based on the actual amount of resources consumed by an application, rather than on pre-purchased units of capacity.

1. Introduction To Serverless
Computing
By Tharuka Vishwajith

2. Any developer focused product which abstract
out the underline servers = Serverless

3. Characteristics of serverless
• No management of server hosting
• Self-auto-scale and auto provision based on load
• Cost based on precise usage
• Performance capabilities defined in terms other than host size/count
• Implicit high availability

4. What includes?
• Function as a service – FAAS
• Database as a service – BAAS
• Storage
• Messaging
• And more…

5. Key benefits of serverless
• Handling servers by a small team with the software product is very difficult.
• Spending more time on building software and less time on administration
• Pay as you use
• Provide abstraction for the developers
Abstraction make more productive
Machine code -> Assembly code -> Application code

6. Function as a Service (FaaS)

7. Overview for FaaS
• No host configuration
• Pay for what’s running
• Scale up for the demand
• Automatic spin down
You have your Pease of code and you can put it into FAAS (Function as a Service)

8. Can easily connect theses services with small custom code

9. Language support

10. If you want in on premise then use
https://www.openfaas.com/

11. FaaS use cases
Good for
• Schedule tasks
• Trigger batch procession
• Email someone
• Thumbnail Procession
Not good for
• Long running jobs
• Stateful back end Ex: Actor based system
• Fine grained scaling controls