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DynamoDB is sometimes considered just a simple key-value store, but nothing could be further from the truth. DynamoDB can handle complex access patterns, from highly-relational data models to time series data or even geospatial data. In this post, we'll see how to model one-to-many relationships in DynamoDB. One-to-many relationships are at the core of nearly all applications. In DynamoDB, you hav
If you're working with DynamoDB, you're likely to rely on Condition Expressions when manipulating items in your table. Condition Expressions can ensure you don't overwrite existing users, allow bank account balances to drop below \$0, or give Admin access to every user in your application. Yet despite their usefulness, I see Condition Expressions misunderstood quite often. My hunch is that this is
I've spent a fair bit of time with API Gateway over the past few years. It's an awesome (if occasionally frustrating) service for building serverless web APIs using Lambda functions. In previous blog posts, I took a close look at the internals of API Gateway and ran a performance test for different API setups. We've explored the intricacies of custom authorizers in API Gateway and how to connect A
When building an application with AWS Lambda, you may need to host your Lambda function in a VPC. The most common reason for this is because your Lambda function will use other resources which aren't accessible from the public internet, such as a relational database or Redis instance. Since the improvement of VPC cold starts in 2019, hosting a Lambda function inside a VPC is more feasible even for
AWS API Gateway is an awesome service to use as an HTTP frontend. You can use it for building serverless applications, for integrating with legacy applications, or for proxying HTTP requests directly to other AWS services. But understanding the elements of API Gateway can be difficult. If you're like me, your understanding of API Gateway might be like the following: "Ohh, you know. A user makes a
Takeaways from the full performance testFargate was still the fastest across the board, though the gap narrowed. API Gateway service proxy was nearly as fast as Fargate at the median, and AWS Lambda wasn't far behind.The real differences show up between the 80th and 99th percentile. Fargate had a lot more consistent performance as it moved up the percentiles. The 98th percentile request for Farga
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