aws serverless intro

Serverless allows developers to run application code in the cloud without managing any server infrastructure. AWS handles the infrastructure management tasks to avoid having that bog down development time, instead we just focus on writing code.

Automated infrastructure management tasks

Capacity provisioning
Patching operating systems
Auto scaling infrastructure
High availability

Competitive advantage

Increases speed to market - eliminates overhead of managing servers and releases

code quickly

Very scalable - we can have a million+ users on a site that would scale automatically
Lower costs - never pay for over-provisioning
- Serverless applications are event-driven and only charged when code is executed
Focus on the application - by not focusing on the infrastructure you can focus

on business logic * AWS offers a range of serverless technologies that integrate seamlessly

Example serverless technologies

Note: Typically serverless technologies are stateless; however, they can call other services that would hold state.

Lambda - enables you to run code as functions without provisioning servers
Simple queue service (sqs) - Message queuing service to decouple and scale apps
Simple notification service (sns) - messaging service for sending texts, mobile notifications, emails
API Gateway - allows you to create, publish, and secure APIs at any scale
DynamoDB - a fully managed NoSQL database
S3 - object storage and web hosting

Example serverless architecture

An example serverless architecture for a website using Auth0, S3, API Gateway, Firebase (NoSQL), Lambda, credit payments.

Serverless exam tips

Serverless - Enables you to build scalable applications quickly without any server management
Low cost - serverless apps are event-driven and only charge when the code is executed
AWS handles heavy lifting - including provisioning, scaling, patching, etc.