Tag55 articles
DynamoDB Data Modeling: How to Design Tables for Scalability and Performance Learn how to model data in Amazon DynamoDB using access patterns, partition keys, sort keys, and GSIs with practical …
5 Mistakes That Wasted Our Money on AWS SageMaker (and the Free Checks That Stop Them) We paid for GPU time just to find out our training jobs were broken. Here’s what went wrong. Imagine booking a …
Fixing NoCredentials and “Auth UserPool Not Configured” Errors in Amplify Gen 2 Setting up a new Gen 2 app usually goes smoothly. You run the sandbox, the backend deploys, the frontend picks it …
When Not to Use Similarity Search in a RAG Pipeline When we learn about RAG, the usual flow feels very natural. A user asks a question, we create an embedding, search the vector database, retrieve …
AWS Lambda in 2026: Web Functions, MicroVMs, and Durable Functions Explained AWS Lambda is no longer one service. Here’s what each new Lambda option does, and which one you should actually use. AWS …
Why DynamoDB Throttles Even When Capacity Is Available Understand how DynamoDB partition keys, physical partitions, capacity limits, and write sharding affect application performance. Your …
How DynamoDB Really Works Partitions, replication, and consistency behind every read and write. Imagine your application sends a PutItem request to DynamoDB. A few milliseconds later, you get a …
How Amazon CloudFront Works Understand CDNs, edge locations, origins, caching, cache behaviors, and security through the CloudFront request lifecycle. Imagine you have deployed a website in an AWS …
Setting Up Pull Request Preview Environments in Amplify Gen 2 A pull request changes an API route and the two screens that call it. The diff looks right. Two people approve it because reading a diff …
Custom Domain Stuck on Pending Verification: How to Fix It Maya had one task left before launch week: point example.com at the Amplify app. She opened the console, added the domain, and Amplify …
Fixing 404s on Page Refresh for React and Vue SPAs with Amplify Rewrite Rules Ryan had shipped the internal reporting dashboard on a Friday. React with React Router, built by Vite, hosted on Amplify …
What If You Could Control Every AI Call From One Place? A practical guide to putting one layer between your application and AI models, so you can track costs, switch models, manage access, and …
Fixing Environment Variables That Are Undefined at Runtime in Next.js SSR on Amplify The app worked on my machine. API_BASE_URL lived in .env.local, the route handler called the API, and the page …
Understanding the APPSYNC_JS Runtime Learn what JavaScript works inside APPSYNC_JS, where it differs from Node.js, and how to avoid common resolver errors in AWS AppSync and Amplify Gen 2. If you …
Multi-Tenant RAG on Amazon S3 Vectors - Part 3: The Pipeline How to Implement a Multi Tenant RAG with AWS S3 Vectors Part 3 of 3. Part 1 set six requirements and argued that only a per-tenant …
Multi-Tenant RAG on Amazon S3 Vectors - Part 2: The Cost Model Part 2 of 3. Part 1 set six requirements and showed that only a per-tenant resource with its own ARN satisfies them. This part is the …
Multi-Tenant RAG on Amazon S3 Vectors - Part 1: The Isolation Model Part 1 of 3. This part is the requirements and the isolation model. Part 2 is the cost model with the arithmetic. Part 3 is the …
Access Multiple DynamoDB Tables with an AppSync JS Unit Resolver Use BatchGetItem and TransactWriteItems in Amplify Gen 2 JavaScript Unit Resolver to access multiple DynamoDB tables without adding a …
Beyond Similarity Search: Metadata Filtering for RAG with Amazon S3 Vectors Semantic search is one of the most useful parts of RAG. A user does not need to ask a question using the exact same words …
Building a Structure-Aware RAG Chunking Pipeline with Amazon Bedrock and S3 Vectors A RAG system can use a good embedding model and a reliable vector database, but the results can still feel less …
How to Get Started with JavaScript Resolvers in AWS Amplify Gen 2 Learn how AppSync JavaScript resolvers work in Amplify Gen 2, when to use them, their runtime limitations, and how to build your …
Why DynamoDB Uses Eventual Consistency Understanding Replication, Partitions, and Leader Nodes in Eventual Consistency If you’ve ever worked with Amazon DynamoDB, you’ve probably come across …
Building a Serverless RAG Pipeline with Amazon S3 Vectors and Amazon Bedrock When I first learned about Retrieval-Augmented Generation (RAG), the architecture looked simple: Store some documents → …
Why IAM Policy Size Breaks an AWS Deployment? Your Lambda’s permissions didn’t get more dangerous. They got too long to write down. Everything was working. The application was growing, new …
Authentication vs Authorization in AWS Amplify Why Permissions Feel Confusing in Amplify When you first start using AWS Amplify, authentication often feels simple. You add Auth, sign-up works …
AWS DynamoDB Eventual Consistency VS Strong Consistency Amazon DynamoDB reads data from tables, local secondary indexes (LSIs), global secondary indexes (GSIs), and streams. Both tables and LSIs …
What Is Amazon EC2? A Beginner’s Guide to Virtual Servers in AWS Amazon EC2 (Elastic Compute Cloud) is a service that provides virtual servers, called instances, in the cloud. You can choose the …
Amazon Bedrock AgentCore Explained for Developers What is Amazon Bedrock AgentCore? Most AI agent demos look strong for five minutes. Then the hard questions show up. Where does the agent run? How …
Amazon S3 Account Regional Namespaces Simplifying S3 Bucket Naming Across AWS Regions Cloud storage is at the heart of modern applications, and Amazon S3 (Simple Storage Service) has long been one of …
AWS ECR for Beginners: How to Store and Manage Docker Images in AWS Many beginners learn how to build Docker images locally, but they are not always sure where those images should live once they move …
How to Expose Internal Applications Securely Using AWS Verified Access (No VPN Required) Imagine you need to securely expose an internal application to a specific group of users in your organization …
Trigger AWS Workflows from Incoming Emails Using Amazon SES Ever wanted to trigger a workflow based on an email sent to a specific recipient address? That’s exactly what we’re going to discuss …
Core AWS Services You Must Know as a Developer AWS looks exciting from a distance. Then you open the console for the first time and see a long list of services, categories, and unfamiliar names. EC2 …
What Is Amazon S3 Vectors? Use Cases, When to Use It, and Cost Amazon S3 Vectors is AWS’s managed service for storing and searching vector embeddings inside the S3 ecosystem. In simple terms, it …
How to Build a RAG Knowledge Base with Amazon S3 Vectors and Amazon Bedrock Amazon Bedrock Knowledge Bases Explained: How Managed RAG Works on AWS Building AI for a business is not just about picking …
Handlebars with AWS Lambda Layers A Practical Way to Manage Reusable Templates in Serverless Apps When you first start using Handlebars in AWS Lambda, everything feels simple. You write a template …
What is AWS Amplify? Building a React app is the easy part. Then the “real app” requirements show up: Users need to sign up and log in You need an API You need a database You need file …
GSI vs LSI in DynamoDB Difference between GSI and LSI in DynamoDB When you start learning DynamoDB, one thing becomes clear very quickly: how you design your keys decides how well your table works …
How to Use Lambda Layers with Amplify Why AWS Lambda Layers Become Essential as Your Serverless App Grows When you first start using AWS Lambda, everything feels clean and simple. You write a …
Choosing the Right AWS Database: SQL vs NoSQL in the Cloud (RDS vs Aurora vs DynamoDB) When you create a app , At first it’s simple: one app, one database. Then the system grows: a background …
Don’t Let Your Bucket Snitch: S3 Encryption Explained What are the Encryption Types in AWS S3? S3 is that one AWS service everyone uses because it’s easy to use. Upload file, get URL, move on …
How I Built a Full-Stack Application Using Kiro, Kiro Powers, and MCP Servers A Chrome Extension Backed by an AWS Serverless Architecture As a Solutions Architect, one of my day-to-day tasks is …
Don’t Make Lambda Call Lambda: Better AWS Patterns A common moment in AWS projects goes like this: You have a Lambda function that receives a request, does some work, and then you realize there’s …
A Beginner’s Guide to AWS Security Groups If you’ve ever launched an EC2 instance and wondered “Why can’t I connect to it?”, chances are the answer lives inside AWS Security …
Understanding AWS Lambda Durable Functions From stateless functions to long-running workflows One of the most talked-about Lambda updates at re:Invent 2025 is Lambda Durable Functions. Until now …
How to Build a Scalable, Real-Time Notification System in AWS Amplify Notifications are a core part of modern applications — they guide users, drive engagement, and deliver critical updates in real …
How to add Cognito user data to DynamoDB | AWS Amplify AWS Cognito is widely used to simplify authentication and authorization for web and mobile applications. It offers built-in features like: User …
Unlock the power of AWS Lambda Monitoring: learn about key metrics, invocation types, and the role of third-party tools for efficient serverless operations.
AWS EBS vs EFS vs S3 How to Choose the Best AWS Storage Option for Your Project Amazon web services are widely used around the world for storage options. However, choosing a storage option is not …
How to Reduce AWS Cost with Spot Instances AWS EC2 Purchasing Options and When to Use Them AWS EC2 is one of the most used could services around the world. However, most new developers aren’t aware …
Managing Database Connections with Amazon RDS Proxy
Secure Your AWS Account with AWS IAM and Multi-Factor Authentication
How to Choose the Best AWS Region for Your Project 4 Factors to Consider When Selecting an AWS Region Today, AWS has become the most used cloud service provider among developers. Although there are …
How Does AWS SQS Work How AWS SQS Makes Asynchronous Request Handling Easy Amazon Simple Queue Service (SQS) is a fully managed message queueing service that allows you to decouple your applications …
AWS CDK — A Beginner’s Guide with Examples A better way to automate your AWS infrastructure If you have a production application running on any cloud platform, you must think of automating the …
