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You are thinking about serverless costs all wrong

You are thinking about serverless costs all wrong

The Register published an article right before Christmas 2018. It had a somewhat provocative title, and somehow it ended up in my inbox…
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Yan Cui
All my posts on Serverless

All my posts on Serverless

Tips for writing Lambda functions
Go to the profile of Yan Cui
Yan Cui
We can do better than percentile latencies

We can do better than percentile latencies

Years ago, I used aver­age laten­cy on every dash­board and every alarm. That is, until I woke up to the prob­lems of aver­age laten­cies…
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Yan Cui
Latest Posts
How to work around CloudFormation circular dependencies

How to work around CloudFormation circular dependencies

An interesting question came up on the AppSync Masterclass forum, and it highlights a common way you can get into CloudFormation circular…
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Yan Cui
My testing strategy for serverless applications

My testing strategy for serverless applications

As a consultant, I have helped a lot of clients with their architecture and built a couple of serverless applications for clients from…
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Yan Cui
Serverless Observability: It’s easier than you think!

Serverless Observability: It’s easier than you think!

Observability is a measure of how well the internal state of a system can be inferred from its external outputs. It helps us understand…
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Yan Cui
Group-based auth with AppSync Lambda authoriser

Group-based auth with AppSync Lambda authoriser

AWS AppSync added support for Lambda authorizers on 30th July 2021 and it made it much easier to implement group-based authorization with…
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Yan Cui
Testing strategies for Step Functions

Testing strategies for Step Functions

AWS Step Functions is a powerful orchestration service that lets you model even the most complex business workflows. It packs a great…
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Yan Cui
How to handle client errors gracefully with AppSync and Lambda

How to handle client errors gracefully with AppSync and Lambda

With API Gateway and Lambda, you can handle client errors gracefully by returning a 4xx response.
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Yan Cui
Lambda layer: not a package manager, but a deployment optimization

Lambda layer: not a package manager, but a deployment optimization

It’s been two years since I last wrote about Lambda layer and when you should use it. Most of the problem I discussed in that original post…
Go to the profile of Yan Cui
Yan Cui
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