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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
Fine-grained access control in API Gateway with Cognito access token and scopes

Fine-grained access control in API Gateway with Cognito access token and scopes

In security and access control, authentication and authorization are two distinct yet interconnected concepts.
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Yan Cui
Is it safe to use ID tokens with Cognito authorizers?

Is it safe to use ID tokens with Cognito authorizers?

A common narrative is that one should always use access tokens to call your APIs, while ID tokens are strictly for identifying users.
Go to the profile of Yan Cui
Yan Cui
Fine-grained access control in API Gateway with Cognito groups & Lambda authorizer

Fine-grained access control in API Gateway with Cognito groups & La...

In security and access control, authentication and authorization mean two distinct but related things.
Go to the profile of Yan Cui
Yan Cui
What’s the best way to do fan-out/fan-in serverlessly in 2024?

What’s the best way to do fan-out/fan-in serverlessly in 2024?

Back in 2018, I shared [1] several ways to implement fan-out/fan-in with Lambda. A lot has changed since, so let’s explore the solution…
Go to the profile of Yan Cui
Yan Cui
I’m sorry, but the way you adopt serverless is wrong

I’m sorry, but the way you adopt serverless is wrong

There is often the sense that going serverless means going microservices and event-driven architectures, too.
Go to the profile of Yan Cui
Yan Cui
How to handle execution timeouts in AWS Step Functions

How to handle execution timeouts in AWS Step Functions

Step Functions lets you set a timeout on Task states and the whole execution.
Go to the profile of Yan Cui
Yan Cui
How to apply the TDD mindset to serverless

How to apply the TDD mindset to serverless

Testing is an integral part of software development. Your tests are a living documentation of your system. They inform others how to use…
Go to the profile of Yan Cui
Yan Cui
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