jsDelivr, the first and only free multi-CDN for open source projects are now using PerfOps FlexBalancer to load balance between their sponsoring CDNs. Until now, jsDelivr had been using Cedexis Openmix to achieve its Multi-CDN load balancing. After analyzing the ease of migration and benefits of FlexBalancer, jsDelivr decided that it was time for a change.

In the last post, Samuell (from the og-aws Slack group) figured out his negative TTL problems in Cloudfront. During that session, we actually solved two different problems. This post is to finish off that conversation and address the other problem, which was how to use the default error page in Cloudfront.

So you want to A/B test your web app. The idea is simple, but the details can get messy, and you don’t want to re-invent the wheel. Services like Optimizely are pretty good, but they can be expensive and full of features you don’t need immediately. In this post, we’ll share how Sentry wrote an experimentation system with minimal work.

Welcome to the second edition of Serverless from the Trenches, our series of bite-sized blog posts aimed at developers and DevOps working in serverless. Each article will focus on a different technique or tool to solve a real-world problem and – hopefully – help make your work in serverless more productive. This week we look at how to add Cognito to your integration tests flow, making for true black box testing.

One of the most common questions we get at Honeycomb is about how to control costs while still achieving the level of observability needed to debug, troubleshoot, and understand what is happening in production. Historically, the answer from most vendors has been to aggregate your data–to offer you calculated medians, means, and averages rather than the deep context you gain from having access to the actual events coming from your production environment.