Wakeup Flower articles - 126 total
Common image formats
🧱 Raster Image Formats (Pixel-based) These are the most common for photos, screenshots,...
From Doubt to Triumph: AWS Certified Solutions Architect Exam
Yesterday, I officially passed the AWS Solutions Architect Associate (SAA-C03) exam ! It definitely...
Lake Formation workflow of RDS & S3
🌊 Goal: Create a data lake that combines data from: Amazon RDS (relational...
Compare Glue, Data Pipeline & Step functions
1. AWS Data Pipeline Purpose: Orchestrates data movement and batch ETL workflows between...
When you can't use serverless DMS
Serverless DMS tasks remove the need to manage replication instances while still supporting full-load...
Connect to EC2 without SSH
Attach the AmazonSSMManagedInstanceCore IAM policy to an IAM role that is associated with the EC2...
2 LB algorithms Round Robin & Least Outstanding Requests
Scenario Web app behind an Application Load Balancer (ALB). Some EC2 instances are...
Route 53 Resolver outbound endpoint
🔹 What an outbound endpoint does A Route 53 Resolver outbound endpoint allows DNS queries...
What's "AWS Local Zones"
AWS Local Zones Definition: AWS Local Zones are extensions of an AWS Region that place...
AWS Instance Scheduler
1. Services Supported by Instance Scheduler Service Resource Type Notes Amazon...
Lambda SnapStart reduces cold start latency (java)
1. What Lambda SnapStart Is AWS Lambda functions, especially Java, can have long cold...
Size limits of S3 EFS and EBS
🧱 1. S3 Object (File) Size Limits Type Limit Minimum object size 0 bytes Maximum...
Aurora cross region replica or global database ?
in one sense: within a single Region, a read replica (Aurora Replica) often gives lower replication...
Use S3 Lifecycle to delete and retain the two recent versions
🧩 How it works When S3 versioning is enabled, each update to an object creates a new...
5 caching strategies
🧠 1. Write-Through Cache Definition: Data is written to the cache and the underlying...
Workload Discovery & free alternatives
Workload Discovery on AWS is not free to use. It incurs costs based on the AWS resources it...
sidecar container in ECS
A sidecar container is just another container that runs alongside your main application container...
ACLs vs Security Groups in AWS
AWS provides two layers of network security at the VPC level: Feature Security Groups Network...
DNS failover in Route 53
Where to configure DNS failover In AWS, DNS failover is configured in Amazon Route 53 —...
S3 Glacier and retrieval
1. What happens when you move data to Amazon S3 Glacier When you use an S3 Lifecycle rule...
IOPS is not Throughput
1. What is IOPS? IOPS = Input/Output Operations Per Second. It measures how many...
Which is cheaper EBS gp2 or gp3
Volume Type Performance Characteristics gp2 General Purpose SSD — IOPS scales with size (3...
RDS Multi-AZ DB clusters Vs Amazon Aurora Global Database
🧩 1. RDS Multi-AZ DB Cluster (for RDS engines like PostgreSQL or MySQL) Purpose: High...
Athentication session & Application session
🧩 Big Picture There are two types of sessions in a web app: Authentication session...
EC2 Auto Scaling lifecycle hooks
EC2 Auto Scaling lifecycle hooks are basically hooks into the launch and termination process of EC2...
Lambda function scaling vs aws batch
Job frequency: once per hour Runtime: ~15 minutes Compute requirement: ~64 vCPU, 512 GiB...
S3 Bucket policy encryption key enforcement
Restatement The requirement is: Update the bucket policy so that any PutObject request...
AWS Security Token Service STS and usage
What is AWS Security Token Service (AWS STS)? AWS STS is a service that issues temporary...
Enable Session Manager and delete shared ssh keys
Step 1 — Enable Session Manager Go to the AWS Systems Manager console. Ensure Session...
Elastic Transcoder & Elemental MediaConvert
Amazon Elastic Transcoder is a media transcoding service that AWS introduced to help convert...