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The Death of the Von Neumann Architecture
Lots of exciting new things were announced at the latest Apple WWDC this week, but hidden amongst the big announcements was an extension of something that's been bothering me for a while.
New
The latest blog posts to take off on Hacker News. 4,390 posts.
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Xhyve – Lightweight Virtualization on OS X Based on Bhyve
The Hypervisor.framework user mode virtualization API introduced in Mac OS X 10.10 (Yosemite) cannot only be used for toy projects like the hvdos DOS Emulator, but is full-featured enough to support a full virtualization solution that can for example run Linux.
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A Constructive Look at TempleOS
TempleOS is somewhat of a legend in the operating system community. Its sole author, Terry A. Davis , has spent the past 12 years attempting to create a new operating from scratch. Terry explains that God has instructed him to construct a temple , a 640x480 covenant of perfection. Unfortunately Terry also suffers from…
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Service-Disoriented Architecture
“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…
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Unix is not an acceptable Unix
The Unix command line is full of surprises. For instance: did you know that the OS X version of the ls tool, most frequently used to get a list of the files in the current working directory, recognizes no fewer than 38 different flags?
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Install OS X 10.10 Yosemite in VirtualBox
A nice blog
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Web App Speed
When Apple originally released the iPhone SDK in 2008, I was extremely excited about it, and immediately started working on multiple different iPhone apps. By 2009, though, I had become so uncomfortable with Apple’s stewardship of its mobile platform that I released the one game that was furthest along, and…
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Signalfd is useless
UNIX (well, POSIX) signals are probably one of the worst parts of the UNIX API, and that’s a relatively high bar. A signal can be sent to your program at any point when it’s running, and you have to deal with it somehow. Traditionally, there are three ways …
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Scaling Secret: Real-Time Chat
(This is the first of a series of technical posts I intend to write, and my goal is to help other engineers learn from the experience of…
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Please stop calling databases CP or AP
This blog post has been translated into Russian , Japanese , Chinese , and Chinese again . For more detail on problems with CAP, and a proposal for an alternative, please see my paper A Critique of the CAP Theorem .
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Memory Layouts for Binary Search
Binary search is a wonderful algorithm: theoretically optimal, fast in practice, and discoverable by school children playing guessing games. Usually we think of binary search as being applied to a sorted array, and we teach it this way.
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A Quick Introduction to LXD
With the recent release of Ubuntu 15.04, aka “Vivid Vervet”, the Ubuntu community has also unveiled an early release of LXD (pronounced “lex-dee”), a new project aimed at revitalizing the use of LXC and LXC-based containers in the face of application container efforts such as Docker and rkt. In this post, I’ll provide…
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Call me maybe: Aerospike
Previously, on Jepsen, we reviewed Elasticsearch’s progress in addressing data-loss bugs during network partitions. Today, we’ll see Aerospike 3.5.4, an “ACID database”, react violently to a basic partition.
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Call me maybe: Elasticsearch 1.5.0
Previously, on Jepsen , we demonstrated stale and dirty reads in MongoDB . In this post, we return to Elasticsearch, which loses data when the network fails, nodes pause, or processes crash.
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The compiler flag that time forgot
I’m often surprised how long software can keep trying to use compatibility features ages after their best-by date. Now that GCC 4.8 builds on Tige...
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Nim binary size from 160 KB to 150 Bytes
The size of binaries in the Nim programming language seems to be a popular topic recently . Nim’s slogan is expressive, efficient, elegant , so let’s examine the efficient part in this post by exploring a few ways to reduce the size of a simple Nim Hello World binary on Linux. Along the way we will:
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Three Tales of Second System Syndrome
In the last decade, three major scripting languages embarked on project to produce a major revision to each language: Perl 6, Python 3, and...
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OS X 10.10.3 seems to have done something bad to wifi drivers
As a PSA (public service announcement), I'm reporting here that updating your Yosemite system to 10.10.3 is incredibly toxic if you use WiFi...
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Coding for SSDs
Translations: This article was translated to Simplified Chinese by Xiong Duo and to Korean by Matt Lee (이 성욱). Introduction I want to make solid-state drives (SSDs) the optimal storage solution for my key-value store project. For that reason, I had to make sure I fully understood how SSDs work, so that I can optimize
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Branchless code sequences
David Thomas's website.
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Call Me Maybe: MongoDB Stale Reads
Please note: our followup analysis of 3.4.0-rc3 revealed additional faults in MongoDB’s replication algorithms which could lead to the loss of acknowledged documents–even with Majority Write Concern, journaling, and fsynced writes.
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