The latest blog posts to take off on Hacker News. 458 posts.
At the heart of Meltwater’s and Fairhair.ai’s information retrieval systems lies a collection of Elasticsearch clusters containing billions of social media posts and editorial articles. The index shards in our clusters vary greatly in their access pattern, workload and size which presents some very interesting…
A catalogue of software constructs, languages, or APIs which are unexpectedly Turing-complete; implications for security and reliability.
Building a high performance supercomputer for under £100 (£550 including twelve Fire3s). Parts list, benchmarks and downloadable plans for laser-cutting the acrylic case.
Since the point of these tests is to explore the performance of the Optane SSDs, the tests are configured much like the previous ondisk benchmark, using a database approximately 5x larger than RAM, to minimize the impact of caching in RAM and force the storage devices to be exercised. However, there are some twists to…
In light of Oracle’s recent announcement indicating an end to free long-term support for OpenJDK after January 2019, we re-affirm that the OpenJDK 8 and OpenJDK 11 Java runtimes in Amazon Linux 2 will continue to receive free long-term support from Amazon until at least June 30, 2023. We are collaborating and…
A guide to a secure and streamlined installation of OpenBSD 6.4 on a laptop.
By a strange coincidence the news broke this morning that RHEL is deprecating KDE. The real surprise here is that RHEL supported KDE all. Back in the 90s they were entirely against KDE and put lots of effort into our friendly rivals Gnome. It made some sense since at the time Qt was under a not-quite-free licence and…
I recently did a corporate TLA+ workshop and some people asked what TLA+ specs look like in practice. If you looked at the most common public examples, you’d probably come away thinking that people only used it for critical consensus algorithms. This is a problem for two reasons: first, it makes it harder to learn…
For the last month or so, I’ve been playing with a new project during my work at Collabora, and as I’ve already briefly talked about at XDC 2018, it’s about time to talk about it to a wider audience.
Some new proposed protocols will encrypt the transport layer headers. Encryption is good, so more encryption must be better, right? Unfortunately there's going to be a huge hidden cost that'll be paid by anyone troubleshooting networking problems.
Today, GitHub code scanning has all of LGTM.com’s key features—and more! The time has therefore come to announce the plan for the gradual deprecation of LGTM.com.
Covers two Linux primitives that are not namespaced by the current set of Linux kernel namespaces.
In-memory workloads continue to be the backbone of innovative data management use cases, but as demand increases, so does the need for even larger memory capacity. In July, we announced a partnership with Intel and SAP to offer GCP virtual machines supporting Intel® Optane DC™ persistent memory for SAP workloads. This…
Parallel sequential scan is the first parallel access method in PostgreSQL and is introduced in version 9.6. The committer of this featu...
An integral part of Facebook’s engineering culture has always been our development work on open source solutions that solve real-world production issues and address key challenges in modern l…
[This message comes directly from the desk of the Fedora Project Leader. — Ed.] In just one week, it will be fifteen years since we announced the release of Fedora Core 1. Now, we’re announcing the release of Fedora 29 — now not just “core”, but Workstation, Server, Atomic Host, a whole collection of desktop Spins […]
Over the past several months, a handful of people had been complaining that Mercurial's test harness was executing much slower on Macs. But this slowdown seemingly wasn't occurring on Linux or Windows. And not every Mac user experienced the slowness!
From the highly eclectic blog of Mark Dominus
Systemd has a remotely exploitable bug in its DHCPv6 client . That means anybody on the local network can send you a packet and take control...
Part 2 in our series on PPS limitations in AWS EC2 will help your organization.
In this blog post, I will talk about the evolution of the core pieces of the Windows kernel that allows it to transparently scale across a low power NVidia...
SIMD is a powerful performance technique, and is especially valuable in signal and image processing applications. I will be using it very extensively in my synthesizer, and also it’s increasingly used in xi-editor to optimize string comparisons and similar primitives.
MongoDB is a long-time user of Jepsen . Over the past three years, Jepsen has performed several analyses for MongoDB, and MongoDB has integrated an expansive Jepsen test suite into their CI system. In March, MongoDB requested Jepsen perform an analysis on a previously untested configuration: sharded clusters. We also…
In this post, we set up the programmable interrupt controller to correctly forward hardware interrupts to the CPU. To handle these interrupts, we add …
