AWS

This blog is now serverless!

I have been thinking about different hosting options for this blog for some time, even just to stop my friends from joking about the fact that I have been so vocal about Serverless technologies and yet, my personal blog runs on WordPress! However, as someone who enjoys writing and have little interest in fiddling with …

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AWS Lambda – monolithic functions won’t help you with cold starts

After my post on monolithic functions vs single-purposed functions, a few people asked me about the effect monolithic functions have on cold starts, so I thought I’d share my thoughts here. The question goes something like this: Monolithic functions are invoked more frequently so they are less likely to be in cold state, while single-purposed …

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Serverless observability brings new challenges to current practices

This is a the first in a mini series that accompanies my “the present and future of Serverless observability” talk at ServerlessConf Paris and QCon London. part 1 : new challenges to observability <- you’re here part 2 : first party observability tools from AWS part 3 : 3rd party observability tools part 4 : the future of Serverless observability 2017 …

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AWS Lambda – how best to manage shared code and shared infrastructure

In the last post I discussed the pros & cons of following the Single Responsibility Principle (SRP) when moving to the serverless paradigm. One of the questions that popped up on both Twitter and Medium is “how do you deal with shared code?”. It is a FAQ whenever I speak at user groups or conferences about AWS Lambda, alongside “how do …

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AWS Lambda – should you have few monolithic functions or many single-purposed functions?

A funny moment (at 38:50) happened during Tim Bray’s session (SRV306) at re:invent 2017, when he asked the audience if we should have many simple, single-purposed functions, or fewer monolithic functions, and the room was pretty much split in half. Having been brought up on the SOLID principles, and especially the single responsibility principle (SRP), …

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I’m afraid you’re thinking about AWS Lambda cold starts all wrong

When I discuss AWS Lambda cold starts with folks in the context of API Gateway, I often get responses along the line of: Meh, it’s only the first request right? So what if one request is slow, the next million requests would be fast. Unfortunately that is an oversimplification of what happens. Cold start happens once for …

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AWS Lambda – use the invocation context to better handle slow HTTP responses

With API Gateway and Lambda, you’re forced to use relatively short timeouts on the server-side: API Gateway have a 30s max timeout on all integration points Serverless framework uses a default of 6s for AWS Lambda functions However, as you have limited influence over a Lambda function’s cold start time and have no control over the amount of …

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Applying principles of chaos engineering to AWS Lambda with latency injection

This is part 2 of a multipart series that explores ideas on how we could apply the principles of chaos engineering to serverless architectures built around Lambda functions. part 1: how can we apply principles of chaos engineering to Lambda? part 2: latency injection for APIs <- you’re here part 3: fault injection for Lambda …

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