Day 43 – Intro To Cloud Computing And AWS Global Infrastructure
Introduction to AWS Global Infrastructure and Cloud Computing Essentials
Today I explored the foundation of modern DevOps workflows — Cloud Computing, with a focus on AWS (Amazon Web Services). I also learned how AWS structures its global infrastructure, which is key to building highly available, scalable, and fault-tolerant applications.
☁️ What is Cloud Computing?
Cloud computing is the on-demand delivery of IT resources over the Internet with pay-as-you-go pricing. Instead of buying and maintaining physical servers or data centers, you can rent computing power, storage, and databases from a cloud provider like AWS.
Cloud Benefits:
No upfront infrastructure cost
Instantly scalable
High availability and redundancy
Global reach
Built-in security
🟨 What is AWS?
Amazon Web Services (AWS) is the world’s leading cloud platform, offering over 175 fully featured services — from compute, storage, and databases to machine learning and analytics.
You can use AWS to:
Host websites and applications
Store and retrieve data
Automate infrastructure (IaaS)
Use serverless functions (FaaS)
Analyze large datasets
More: aws.amazon.com
🌐 AWS Global Infrastructure
AWS has built one of the most secure, scalable, and reliable global infrastructures. Here’s what I learned:
✅ Key Features
77 Availability Zones across 24 Regions globally
Plans for 15 more AZs and 5 new Regions in India, Indonesia, Japan, Spain, and Switzerland
Designed for:
High availability (multiple AZs per region)
Compliance & data residency
Low-latency access for global users
🌍 Link: https://infrastructure.aws
🔄 High Availability & Replication
Availability Zones (AZs) are isolated data centers within a region.
You can launch resources across multiple AZs for fault tolerance.
Replication across regions improves continuity and disaster recovery.
📍 Regions vs Availability Zones
Region = geographic area (e.g.,
us-east-1in North Virginia)AZ = one or more isolated data centers in a region
💡 When launching an EC2 instance, you can choose a specific AZ to improve redundancy.
🔐 What is IAM (Identity and Access Management)?
IAM is AWS’s security and access control system. It lets you securely manage users, permissions, and access to your AWS resources.
✨ IAM Features:
Granular permissions (least privilege access)
Multi-factor authentication (MFA)
IAM Roles for service-level access
Shared account access
Federated identity (SSO, etc.)
Free to use
📖 Read More: AWS IAM Docs
🧠 What I Learned Today
Cloud computing is the foundation of DevOps
AWS is the biggest cloud player with global reach
Its infrastructure is built for scale, performance, and fault-tolerance
IAM is a must-know for secure cloud operations
Tomorrow we learn more about AWS Services
