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Lessons (22)

• Multi-Region and Disaster Recovery

  … Multi-region deployment and recoverable backups solve different failures. Walk through a failure and recovery The original region …

• Resilience, Disaster Recovery and Multi-Region Design

  … DynamoDB supports eventual and strong multi-Region consistency modes with different characteristics; see [global-table consistency](https://docs …

• Environments, Workspaces, and Multiple Accounts

  … the hosted service. Multiple provider configurations In an AWS-configured root, add a second region using an alias …

• DynamoDB Modeling, RDS Scaling and Data Resilience

  … In-memory cache for microsecond reads Global tables Multi-region replication with a selected consistency mode PITR Point …

• Networking, DNS and Traffic Routing

  … different healthy endpoints by region or policy. Anycast advertises one IP from multiple locations, so routing usually reaches …

• Cost Optimization and the Well-Architected Framework

  … multi-region active-active doubles cost; justify it with RTO and RPO. - Managed versus self-managed : managed services …

• AWS Interview Questions: Clear Answers

  … An AZ is an isolated data-centre area inside that Region. I use multiple AZs for availability, while …

• Practical Project: Deploy a Real CRM App on EKS

  … aws eks associate-access-policy \ --cluster-name "$CLUSTER" --region "$REGION" \ --principal-arn ROLE ARN \ --policy-arn arn:aws …

• Collaborative Document Editing & Real-Time Sync

  … 2. How do you go multi-region? Home each document in one region near most of its editors …

• AWS: Start Here

  … is a security and billing boundary. - A Region contains multiple AZs. - Start with managed services when they fit …

• Backend Design Scenarios

  … How do you scale without overprovisioning the rest of the year?]( 6-traffic-spikes-10x-in-one-region …

• Debug Latency Like an Investigator

  … More instances can multiply pools and worsen database contention. Walk through a failure and recovery A missing index …

• Scaling, Load Balancing & Rate Limiting

  … Use health checks, multiple balancer nodes or a managed service, and a DNS/global traffic layer for regional …

• Multi-Account Strategy, Governance and Security Operations

  … owner, environment, organizational unit, access groups, billing tags, Region policy, logging, and recovery contact. Apply a baseline through …

• Run Containers on AWS with ECR and ECS

  … The commands below assume AWS CLI v2, Docker, an authorized academy profile, Region ap-southeast-1 , and that …

• Brokers, Replication & Durability

  … a whole zone doesn't lose a partition. - Multi-region: tools like MirrorMaker 2 or Cluster Linking copy …

• Practical Lab: S3 File Upload and CloudFront Delivery with NestJS

  … aws s3api create-bucket --bucket $BUCKET --region $REGION For any other region, use: aws s3api create-bucket --bucket …

• Capacity Planning, SLOs and Error Budgets

  … caching, replication and multi-region copies are not free. From SLO to an operating decision Suppose checkout has …

• Design a Ride-Sharing Service

  … Watch stale-location age, match latency, conflicts and regional imbalance. Two data paths with different truth Driver location …

• IAM Deep Dive: Policy Evaluation, STS and Cross-Account Access

  … session name = academy-audit region = ap-southeast-1 Replace account IDs, role, and Region with your lab values …

• S3: Store Files Safely

  … check the intended object's state and update the same pending record rather than creating multiple records. Clean …

• Internals, Upgrades, Resilience and Interview Questions

  … system pods win during pressure. - Multi-cluster for blast-radius isolation or regions: Argo CD ApplicationSets, a service …