One of the complaints developers often have for AWS Lambda is the inability to run and debug functions locally. For Node.js at least, the Serverless framework and VS Code provides a good solution for doing just that. An often underused feature of the Serverless framework is the invoke local command, which runs your code locally by …
Hi everyone, just a quick note to let you know that I’m running a live online course with O’Reilly on designing serverless architectures with AWS Lambda. It’s a 2-day course on September 11-12th with 6 hours in total, and it’s available for free if you have a subscription with SafariBooksOnline. Registration for the course is open till September …
I’m running a live course on designing serverless architecture with AWS Lambda Read More »
Security in serverless world from Yan Cui
The Saga pattern is a pattern for managing failures, where each action has a compensating action for rollback. In Hector Garcia-Molina’s 1987 paper, it is described as an approach to handling system failures in a long-running transactions. It has become increasingly relevant in the world of microservices as application logic often needs to transact across …
Applying the Saga pattern with AWS Lambda and Step Functions Read More »
part 1: overview part 2: testing and CI/CD part 3: ops part 4: building a scalable notification system part 5: building a better recommendation system <- you’re here When I joined Yubl in April 2016, it had launched just 2 months earlier, after a long and chaotic development cycle that lasted more than 2 years …
AWS announced general availability of AWS Lambda support for AWS X-Ray back in May. It’s taken me a while to try it out, and whilst I see plenty of values I think its current limitations significantly restricts its usefulness in a complex system. I found Lambda-specific documentations to be fragmented and I had to rely …
aws x-ray and lambda : the good, the bad and the ugly Read More »
In the last post I compared the coldstart time for Lambda functions with different language, memory and code size. One of the things I learnt was that idle functions are no longer terminated after 5 minutes of inactivity. /2017/06/aws-lambda-compare-coldstart-time-with-different-languages-memory-and-code-sizes/ It is a fantastic news and something that Amazon has quietly changed behind the scene. However, …
Finding coldstarts : how long does AWS Lambda keep your idle functions around? Read More »
A while back we looked at the performance difference between the language runtimes AWS Lambda supports natively. We intentionally omitted coldstart time from that experiment as we were interested in performance differences when a function is “warm”. However, coldstart is still an important performance consideration, so let’s take a closer look with some experiments designed …
aws lambda – compare coldstart time with different languages, memory and code sizes Read More »
update Jan 26, 2020: since this article was already written, the problem of throughput dilution has been resolved by DynamoDB’s adaptive capacity feature which is applied in real-time. TL;DR – The no. of partitions in a DynamoDB table goes up in response to increased load or storage size, but it never come back down, ever. DynamoDB …
Beware of dilution of DynamoDB throughput due to excessive scaling Read More »
Having previously blogged about the untrodden path to enable caching on API Gateway request parameters in the Serverless framework 0.5.X, it’s a little disappointing that it’s still not officially fixed in the 1.X versions… The Problem The problem is two-fold: there’s currently no way to specify caching should be enabled for path & query string …
Serverless 1.X – enable API Gateway caching on request parameters Read More »
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