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We encounter a lot of organizations talking about or attempting to implement SRE as part of our consulting at Real Kinetic. We’ve even discussed and debated ourselves, ad nauseam, how we can apply it at our own product company, Witful. There’s a brief, unassuming section in the SRE book tucked away towards the tail end of chapter 32, “The Evolving SRE Engagement Model.” Between the SLIs and SLOs,
Building a Distributed Log from Scratch, Part 1: Storage Mechanics The log is a totally-ordered, append-only data structure. It’s a powerful yet simple abstraction—a sequence of immutable events. It’s something that programmers have been using for a very long time, perhaps without even realizing it because it’s so simple. Whether it’s application logs, system logs, or access logs, logging is somet
“Taco Bell Programming” is the idea that we can solve many of the problems we face as software engineers with clever reconfigurations of the same basic Unix tools. The name comes from the fact that every item on the menu at Taco Bell, a company which generates almost $2 billion in revenue annually, is simply a different configuration of roughly eight ingredients. Many people grumble or reject the
Like most industry jargon, “DevOps” means a lot of things to a lot of different people. While many folks view it as specific to certain tooling or practices, such as CI/CD or Infrastructure as Code (IaC), I’ve always viewed it as an organizational model for how software is built and delivered. In particular, my interpretation is that DevOps is about shifting more responsibilities “left” onto devel
About a year and a half ago, I published Dissecting Message Queues, which broke down a few different messaging systems and did some performance benchmarking. It was a naive attempt and had a lot of problems, but it was also my first time doing any kind of system benchmarking. It turns out benchmarking systems correctly is actually pretty difficult and many folks get it wrong. I don’t claim to have
Okay, maybe not everything you know about latency is wrong. But now that I have your attention, we can talk about why the tools and methodologies you use to measure and reason about latency are likely horribly flawed. In fact, they’re not just flawed, they’re probably lying to your face. When I went to Strange Loop in September, I attended a workshop called “Understanding Latency and Application R
What You Want Is What You Don’t: Understanding Trade-Offs in Distributed Messaging If there’s one unifying theme of this blog, it’s that distributed systems are riddled with trade-offs. Specifically, with distributed messaging, you cannot have exactly-once delivery. However, messaging trade-offs don’t stop at delivery semantics. I want to talk about what I mean by this and explain why many develop
“You can have a second computer once you’ve shown you know how to use the first one.” -Paul Barham The first rule of distributed systems is don’t distribute your system until you have an observable reason to. Teams break this rule on the regular. People have been talking about service-oriented architecture for a long time, but only recently have microservices been receiving the hype. The problem,
Go Is Unapologetically Flawed, Here’s Why We Use It Go is decidedly polarizing. While many are touting their transition to Go, it has become equally fashionable to criticize and mock the language. As Bjarne Stroustrup so eloquently put it, “There are only two kinds of programming languages: those people always bitch about and those nobody uses.” This adage couldn’t be more true. I apologize in adv
I’m often surprised that people continually have fundamental misconceptions about how distributed systems behave. I myself shared many of these misconceptions, so I try not to demean or dismiss but rather educate and enlighten, hopefully while sounding less preachy than that just did. I continue to learn only by following in the footsteps of others. In retrospect, it shouldn’t be surprising that f
Stream processing and related abstractions have become all the rage following the rise of systems like Apache Kafka, Samza, and the Lambda architecture. Applying the idea of immutable, append-only event sourcing means we’re storing more data than ever before. However, as the cost of storage continues to decline, it’s becoming more feasible to store more data for longer periods of time. With immuta
In the past, I’ve looked at nanomsg and why it’s a formidable alternative to the well-regarded ZeroMQ. Like ZeroMQ, nanomsg is a native library which markets itself as a way to build fast and scalable networking layers. I won’t go into detail on how nanomsg accomplishes this since my analysis of it already covers that fairly extensively, but instead I want to talk about a Go implementation of the
A Look at Nanomsg and Scalability Protocols (Why ZeroMQ Shouldn’t Be Your First Choice) Earlier this month, I explored ZeroMQ and how it proves to be a promising solution for building fast, high-throughput, and scalable distributed systems. Despite lending itself quite well to these types of problems, ZeroMQ is not without its flaws. Its creators have attempted to rectify many of these shortcoming
Liftbridge has evolved a lot since making the first commit in October 2017, but the vision has remained the same: provide a message-streaming solution with a focus on simplicity and usability. This is demonstrated through many of the design and implementation decisions. A few examples include the use of NATS as the messaging backbone, avoiding heavy dependencies on runtimes like the JVM and extern
Disclaimer (10/29/20) – The benchmarks and performance analysis presented in this post should not be relied on. This post was written roughly six years ago, and at the time, was just the result of my exploration of various messaging systems. The benchmarks are not implemented in a meaningful way, which I discussed in a follow-up post. This post will remain for posterity and learning purposes, but
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