Data
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 examples.
TCTharaka Chathuranga · · 7 min read
Writer8 articles
Tharaka Chathuranga
Software Engineer @ Enlear
Data
Why DynamoDB Throttles Even When Capacity Is Available
Why DynamoDB Throttles Even When Capacity Is Available Understand how DynamoDB partition keys, physical partitions, capacity limits, and write sharding affect application performance. Your …
Tharaka Chathuranga · · 7 min read
Data
How DynamoDB Really Works
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 …
Tharaka Chathuranga · · 8 min read
Serverless
Reduced Lambda Bundle Size in Amplify Gen 2
Reduced Lambda Bundle Size in Amplify Gen 2 A Lambda that just reads from DynamoDB, talks to a couple of AWS services, and returns a JSON payload should be tiny. So when I noticed some of our …
Tharaka Chathuranga · · 7 min read
Serverless
Understanding the APPSYNC_JS Runtime
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 …
Tharaka Chathuranga · · 4 min read
Serverless
Access Multiple DynamoDB Tables with an AppSync JS Unit Resolver
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 …
Tharaka Chathuranga · · 7 min read
Serverless
Scaling Amplify Gen 2: Splitting Lambda Functions Across Stacks
Scaling Amplify Gen 2: Splitting Lambda Functions Across Stacks Use a centralized defineFunction wrapper to automatically distribute Lambda functions across resource groups as your backend grows. On …
Tharaka Chathuranga · · 7 min read
Serverless
How to Get Started with JavaScript Resolvers in AWS Amplify Gen 2
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 …
Tharaka Chathuranga · · 12 min read