Better Dev Link

People say many things about entropy: entropy increases with time, entropy is disorder, entropy increases with energy, entropy determines the arrow of time, etc.. But I have no idea what entropy is, and from what I find, neither do most other people. This is the introduction I wish I had when first told about entropy, so hopefully you find it helpful. My goal is that by the end of this long post we will have a rigorous and intuitive understanding of those statements, and in particular, why the universe looks different when moving forward through time versus when traveling backward through time.

The Cinema Industry is using its own standards for creating and distributing movies in a secure way. The DCI (Digital Cinema Initiatives) specification defines everything from file formats and encryption to the projection systems itself.

The specification itself is publicly available but relies on various IEEE (Institute of Electrical and Electronics Engineers) and SMPTE (Society of Motion Picture and Television Engineers) standards, which have to be purchased.

At scale of OpenAI, I imagine they might shard PostgreSQL. But they utilize an unsharded architecture with one writer and multiple readers, demonstrating that PostgreSQL can scale gracefully under massive read loads.

Email is very well distributed where you cannot get lock down by a provider. As long asyou own domain, you can move email anywhere. In email world, generally SMTP is for sending email and IMAP is for receiving mail. In this article, we focus on IMAPv4.

In this section, I talk about why VPCs were invented and how they work. This is critical to understand because almost everything you do in AWS will happen inside of VPC. If you don’t understand VPCs, it will be difficult to understand any of the other networking concepts.

Printing on unix-like operating systems like Linux or macOS is usually done through the CUPS daemon. CUPS is responsible for handling printer configuration, scheduling print jobs and actually talking to the printer over the wire. In this article we discuss a printer system for ticket using FGL. And they implement a CUPS driver to take the rastered pixel data and ouput FGL.

A deeper look at how PostgreSQL logical replication works, from WAL internals and logical decoding to streaming protocols and replica lag. If you’ve ever wondered what’s happening under the hood, this post connects the dots.

Think of this post as your field guide to a new way of building software. By the time you finish reading, you’ll understand not just the how but the why behind AI-assisted development that actually works.

diffing dataset is very useful in data engineering. incremental syncing, detect drift etc. how can we create a tool that could efficiently diff large SQL datasets across different databases and servers. This article build such as a tool with: Divide, Hash, And Conquer

Instead of renting the GPU we can pay up-front cost to build a server with GPU. This post can serve as a simple foundation into this process with sourcing parts and assbler thing together.

Every backend dev will hit file limit at some point and we run something like ulimit -n 65000 to fix it. But how we debug it, how we find out how many file it openning? and what is these file descriptor.

Warpstream control plane is written in Go, which has excellent built-in support for debugging application memory issues with pprof. We’ve used pprof hundreds of times in the past to debug performance issues, and usually memory leaks are particularly easy to spot. But in this case, this isn’t something that pprof could help with.

Curated collection of system prompts for top AI tools. Perfect for AI agent builders and prompt engineers. Incuding: ChatGPT, Claude, Perplexity, Manus, Claude-Code, Loveable, v0, Grok, same new, windsurf, notion, and MetaAI.

A collection of inspiring lists, manuals, cheatsheets, blogs, hacks, one-liners, cli/web tools and more.