Weekly update 21

You can become a serverless blackbelt. Enrol to my 4-week online workshop Production-Ready Serverless and gain hands-on experience building something from scratch using serverless technologies. At the end of the workshop, you should have a broader view of the challenges you will face as your serverless architecture matures and expands. You should also have a firm grasp on when serverless is a good fit for your system as well as common pitfalls you need to avoid. Sign up now and get 15% discount with the code yanprs15!

Hi, welcome to another weekly update.

Designing serverless applications with AWS Lambda

I’m running a live online training session with O’Reilly on April 15th and 16th. The session would provide some hands-on exercise for getting started with AWS Lambda and the Serverless framework, and provide you with the tools you need to design serverless applications with Lambda. This is an intermediate level session, and runs for a total of 6 hours over the two days. It is free for SafariBooksOnline subscribers, but you can also take advantage of the free trial and take this session as part of the free trial.

You can find out more about the session and register here.

New posts

DynamoDB TTL as an ad-hoc scheduling mechanism. I explored the idea of using DynamoDB TTL and DynamoDB Streams as a way to implement a scheduling service for ad-hoc tasks. I looked at how this system can be implemented, and how well it works in terms of scalability and precision. After running some experiments I found that, this solution is fairly imprecise. Tasks are executed an average of 10 minutes behind their scheduled time.

Understanding the scaling behaviour of DynamoDB OnDemand tables. I ran a number of experiments to see how DynamoDB manages the scaling of an OnDemand table. I was impressed with what I found – OnDemand tables can support up to 4000 ops/s out of the box. You will still get throttled when you exceed this initial limit. But OnDemand tables would also autoscale and adapt to your peak throughput, so that in the future you won’t experience throttling when you experience the same spike again. Overall, I feel confident about OnDemand tables and think they should be the default for anyone using DynamoDB.

Upcoming presentations

Quite a busy couple of week coming up! If you see me at one of these events, please grab me and say hi :-D

28th March – I’ll be speaking about serverless and FinDev at CloudConf in Turin.

29th March – I’ll be speaking about serverless observability at ServerlessDays Amsterdam.

1st April – I’m joining a star-studded lineup of speakers on 1st April for OpenInfraDays in London. And I’m gonna be talking about serverless, and why it’s more FinDev than it’s DevOps.

2nd April – I’ll be taking a deep dive into how we built a social network on serverless at the AWS Community Summit in Manchester.

3rd April – I’ll be speaking about serverless observability at CodeMotion Amsterdam.

11th April – I’m honoured to be the opening keynote for the first ever ServerlessDays Zurich! I’ll discuss the journey to serverless, the co-evolution of development practices and where we are headed with serverless.

19th April – I’ll be talking about running serverless in production at DevExperience in Iasi. I will also run a one-day workshop after the main event as well.

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Hi, I’m Yan. I’m an AWS Serverless Hero and I help companies go faster for less by adopting serverless technologies successfully.

Are you struggling with serverless or need guidance on best practices? Do you want someone to review your architecture and help you avoid costly mistakes down the line? Whatever the case, I’m here to help.

Hire me.


Skill up your serverless game with this hands-on workshop.

My 4-week Production-Ready Serverless online workshop is back!

This course takes you through building a production-ready serverless web application from testing, deployment, security, all the way through to observability. The motivation for this course is to give you hands-on experience building something with serverless technologies while giving you a broader view of the challenges you will face as the architecture matures and expands.

We will start at the basics and give you a firm introduction to Lambda and all the relevant concepts and service features (including the latest announcements in 2020). And then gradually ramping up and cover a wide array of topics such as API security, testing strategies, CI/CD, secret management, and operational best practices for monitoring and troubleshooting.

If you enrol now you can also get 15% OFF with the promo code “yanprs15”.

Enrol now and SAVE 15%.


Check out my new podcast Real-World Serverless where I talk with engineers who are building amazing things with serverless technologies and discuss the real-world use cases and challenges they face. If you’re interested in what people are actually doing with serverless and what it’s really like to be working with serverless day-to-day, then this is the podcast for you.


Check out my new course, Learn you some Lambda best practice for great good! In this course, you will learn best practices for working with AWS Lambda in terms of performance, cost, security, scalability, resilience and observability. We will also cover latest features from re:Invent 2019 such as Provisioned Concurrency and Lambda Destinations. Enrol now and start learning!


Check out my video course, Complete Guide to AWS Step Functions. In this course, we’ll cover everything you need to know to use AWS Step Functions service effectively. There is something for everyone from beginners to more advanced users looking for design patterns and best practices. Enrol now and start learning!