2026-07-05

AWS Services

Table of Contents

Here I list some AWS services and what they do.

IMO, AWS direly a map from Domain of Science.

1. Basics

IAM

  • Setup user and roles
  • User can login to AWS
  • Roles have permissions to different AWS services or even different rows in a database
  • Attach user to roles

Identity Center

  • Links identity providers (Google workspace, Okta, etc) to AWS
  • And link those user to different roles in IAM

2. APIs

Elastic Load Balancer

  • Redirect traffic to EC2 instances

API Gateway

  • Can act like a load balancer forwarding reqest to a server
  • Can forward request to other AWS service directly without needing a server
  • Can setup throttling, rate limiting, and user authentication and authorization (through Cognito)

3. Compute

Elastic Compute Cloud (EC2)

  • Choose memory, OS, CPU and you have a virtual computer

Lambda

  • EC2 runs a server and you pay for every second
  • In Lambda you upload code and it runs on an event (like when file upload in S3, when user profile is created in Cognito)
  • Scaling is handelled automatically
  • You only pay for number of requests and run time

Elastic Container Registry

Elastic Container Service (ECS)

  • starting, stoping and allocating virtual machines to run docker containers

Elastic Kubernetes Service (EKS)

  • Gives you more control over your containers

4. Application Coordination

Simple Notification Service (SNS)

  • Can be used to spread events do application / different servers

Simple Queue Service (SQS)

  • Queues
  • No backpressure. The clients poll and process what they can

Step Function

  • Graph of tasks/steps you want to do.

5. Storage

Simple Storage Service (S3)

  • General purpose file storage
  • To serve static files
  • We need to choose the S3 server location

Glacier

  • To store files for archival purposes

CloudFront

  • To do regional caching of files hosted on S3
  • Because directly serving from S3 is costly

Elastic Block Storage (EBS)

  • Is like hard disks
  • Can attach to one EC2 instance at once
  • High throughput IO and consistency

Elastic File System (EFS)

  • You can mount EFS to multiple servers at once
  • Is performant like Block Storage
  • Higher cost

6. Config

Secrets Manager

  • Store and provide secrets to EC2

App Config

  • To store feature flags. EC2 instance have to poll, Lambda uses new feature flags automatically

Certificate Manager

  • Ensure that the endpoint server/service on Route 53 has a valid certificate
  • Issued by AWS or other services

7. Database

Relational Database Service (RDS)

  • Supports Postgressql, oracle, MySQL, …
  • Better than using EC2 is it handles scaling, storage, … stuff

Aurora

  • Similar to RDS but managed and faster
  • Also supports a serverless variant

Dynamo DB

  • key value database

Document DB (MongoDB)

  • not mongoDB but is 1-1 mapping to mongoDB

Keyspaces (Cassandra)

  • Managed version of Cassandra

Neptune

  • Graph database

ElasticSearch (OpenSearch)

  • based on apache lucene
  • for document storage, and full text search capabilities

Timestream

  • for timeseries datasets

8. Caching

Elastic Cache

  • Supports Redis or MemCaches

MemoryDB

  • Cache but data persists when the node is down

9. Analytics

Redshift

  • Data Warehouse (where we dump structured dataset from multiple sources)

Kinesis

  • Real time data stream
  • to use on stuff like Apache Spark using Amazon Map Reduce

MSK (Managed Streaming for Apache Kafka)

10. Machine Learning

SageMaker

  • For training ML models
  • Provies a managed Jupyter notebook

11. Other services

Simple Email Service (SES)

Route 53

  • It is a DNS, Domain Management and Traffic management service
  • Can do health checks
  • Can route DNS based on geographic location, latency

Cloud Watch

  • Collect logs and events

Auto Scaling

  • Uses logs from Cloud Watch to auto scale EC2 instances

Cloud Formation

  • Infrastructure as Code for AWS

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