This week I shared a small tip to debug CI build failure easiser. If you ever debug some tricky CI failure and say to your self: “If I can SSH into this server or container that running the build, I will be able to figure out immediately”, then this could be very useful. It can also apply anytime we need to SSH back into some private infrastructure.

During the infrastructural exploration of a pipeline my team was building, we discovered a query that could have cost us nearly $1 million USD a month in BigQuery. Below, we’ll detail how we reduced this and share our tips for lowering costs in BigQuery.

Recently, the Chrome developers announced their decision to remove the behind-a-flag support for JPEG XL. Cloudinary argue(to which I agree) JPEG XL can bring these benefits without introducing a regression in other areas, at least in terms of technical strengths. We can only hope that the Chrome developers reverse their decision and help JPEG XL catch up with the old formats in terms of software support, so we can all enjoy the benefits it brings.

Almost web app needs to make call to third party API such as taking a payment, send out an email. By wrapping an adapter around each API, presenting only the features of that API the app needs, we can more easily manage and test the app.

when we run diff or git diff, we see a visualization of what were add, insert or delete? what algorithm power that?

If you’ve ever wanted to build a web app that you can control with hand gestures as if by magic, this article is for you. With a couple of APIs and some JavaScript, you can build apps that behave like sorcery.

BTree is the most common index type we used every day. For exact lookup, BTree probably best choice most of time, but if you’re looking for a range query, Brin maybe an option

We’re going to dig into some of the flexibility on architecting your database and terminology within Postgres and the trade-offs for different approaches.

When you tune performance for a system, very quickly you run into stuff like nofile, transaparent huge page which usually either has some high level command to set it, or sometime require you to change a certain parameters by writing to /proc/sys/dev. So today we will have a look around it.

This is a step by step guide on how to become a DevOps engineer, with links to relevant learning resources. If you plan to become a DevOps engineer, could be a great learning resource.