TL;DR: I design short wrapper scripts to send batch jobs to a cluster. The first architecture (ventilator-worker-sink) is suboptimal, therefore I consider another pattern to dispatch the jobs efficiently. Recently I had to make a big chunk of computations…
You know what's a good cure for office boredom? A Mac app that changes parts of your screen into a playable level straight out of Super Mario Bros. Thanks to Aaron Randall's Screentendo desktop add-on, a similar process to that of taking a screenshot...
The latest news from Google on open source releases, major projects, events, and student outreach programs.
Google has announced a new typeface for Google Books: Literata. Replacing Droid Serif as the default typeface for e-books via Google Books, Google says Literata is “perfect for long reads on all devices”. Created in conjunction with TypeTogether, Google…
Copyright (c) 2014-2019 DeNA Co., Ltd., Kazuho Oku, Tatsuhiko Kubo, Domingo Alvarez Duarte, Nick Desaulniers, Marc Hörsken, Masahiro Nagano, Jeff Marrison, Daisuke Maki, Laurentiu Nicola, Justin Zhu, Tatsuhiro Tsujikawa, Ryosuke Matsumoto, Masaki TAGAWA,…
It used to be so easy. Measuring the weight of a web page in the early days of the web was merely a matter of waiting for the page to finish loading and then counting up the size of its constituent resources. Since then, however, a lot has changed. The…
BitTorrent is an open, peer-to-peer protocol for distributing files. You can use the BitTorrent protocol to retrieve any publicly-accessible object in Amazon S3. This section describes why you might want to…
dnsdiff compares the responses between two nameservers and provides output in universal diff format. Run dnsdiff before delegating authority of a zone to a new provider to ensure that the new provider has imported your zonefile correctly. usage: dnsdiff…
A functional library for watermarking images in the browser. Written with ES6, and made available to current browsers via Babel. Supports urls, file inputs, blobs, and on-page images. Note: For anyone that is interested: I ported this to a ClojureScript…
By Paul Liu, DevOps Developer, at 500px. You can find him here on StackShare and on Twitter 500px is an online community for premium photography. Millions of users all over the world share, discover, sell and buy the most beautiful images. We value…
If you are one of those devs who uses the terminal a lot and ends up with way too many tabs open, or practices pair programming, then this post is for you. During the last months, I’ve started using Tmux a lot. Since I’ve found it to be very useful, I…
I am proud to be one of the 17 founders/authors of the The Agile Manifesto back in 2001. I think it provided a jolt of energy, hope of a better way of doing things, of creating software and making the world work better. It was a pivotal turning point. But…
I try a lot of iOS apps and many offer chat features (especially social networking and dating apps). Almost all are unique in their own ways and nearly all of them are broken in one way or another, usually they’re either too slow (not real-time) or too…
Aerial footage is a nice way to capture those action sports endeavors, and it's even better if you can fit the gear in your backpack. Lily ticks those boxes, and all you have to do to launch it is toss it up in the air. Once airborne, the camera UAV ...
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While sales of Apple's iPhones and Macs have been breaking records, the five-year-old iPad has been experiencing a slump. Apple appears to be trying to counteract the downward trend with a new mini-site that's been published online showing how the iPad can…
an interesting/influential/important paper from the world of CS every weekday morning, as selected by Adrian Colyer Large-scale cluster management at Google with Borg – Verma et al. 2015 Borg has been running all of Google’s workloads for the last ten…
For many, Docker is the next big thing in cloud computing. But some big names—most notably Google—are now backing an alternative to this enormously influential technology. In December, one of Docker's earliest supporters, the Silicon Valley startup…
About 2 weeks ago Oracle published the MySQL 5.7.7-labs-json version which includes a very interesting feature called “Generated columns” (also know as Virtual or Computed columns). MariaDB has a similar feature as well: Virtual (Computed) Columns. The…
I have recently seen several cases when performance for MySQL queries on a single table was terrible. The reason was simple: the wrong indexes were added and so the execution plan was poor. Here are guidelines to help you optimize various kinds of single…
one line of code at a time Can you spot the bug in the following code? _xhr.open(options.type, options.url, options.sync); The problem is that the last param to xhr.open is whether the xhr is async. Ouch. Turns out, this code was written intentionally,…
Available for Mac, iOS, Windows, and Android, 1Password is a must-have for desktop and mobile users seeking equal parts online security and convenience. But there’s far more to this software than its single-purpose name might imply. 1Password owners…
Secure your website the easy way. SSLMate makes it easy to buy, deploy, and manage your SSL certs. Get SSL certificates from the command line in under 60 seconds. No complicated openssl commands or copy-and-pasting certificate bundles.…
After we released pquery to the community, and as we started logging bug reports with pquery testcases, it quickly became clear that pquery binaries with statically compiled-in client libraries would be of great convenience, both for ourselves and for the…
When you sell or donate a Mac or give it to a family member, it’s best to make a clean break: wipe the puppy clean, reinstall the latest version of OS X, and hand off a system that you’re not worried has remnants of yourself on it. But how can you be sure?…
Netflix is increasingly turning to Python over Java to power certain aspects of its video-streaming service, such as generating and processing alerts, boosting resilience, securing transactions, producing deployable AMIs (Amazon Machine Images), and for…
Inspired by the best and built for XMPP, Kaiwa is a beautiful web-based client for the only standardized chat protocol. Combined with Prosody, one of the best XMPP servers out there, Kaiwa provides an unparalleled XMPP experience, on par…
Vector is an open source host-level performance monitoring framework, which exposes hand-picked, high-resolution system and application metrics to every engineer’s browser. Having the right metrics available on demand and at a high resolution is key to…
Google might want to improve its timing a bit. You see, the search giant has released the source code for its Santa Tracker apps... in April. In other words, right when the snow has finished melting in many corners of the world. That's a little too l...
While some of OS X’s applications have their own data structures—like Mail and Photos—Finder is likely where you will be doing most of your file organization. After you have created or collected hundreds (if not thousands) of files on your Mac, you might…
In 2014 Etsy’s infrastructure group took on a big challenge: scale Etsy’s API traffic capacity 20X. We launched many efforts simultaneously to meet the challenge, including a migration to HHVM after it showed a promising increase in throughput. Getting our…
Every day hundreds of millions of dollars are wasted by allowing improperly tuned or misconfigured systems, misunderstood infrastructure, and inefficient IT operations to live and thrive in data centers around the globe. There are both direct and indirect…
iOS devices have completely changed the way we write. Not only has iOS given us the flexibility to quickly jot down our thoughts wherever and whenever they strike, it's fundamentally flipped our expectations of the humble text editor. In an effort to…
Welcome to pid.codes. If you’re a maker, hobbyist, or startup company producing your own USB device, you’ve probably discovered that you need a USB Vendor ID and Product ID to uniquely identify your device to computers. The USB-IF’s position is that the…
This is a Git Style Guide inspired by How to Get Your Change Into the Linux Kernel, the git man pages and various practices popular among the community. Translations are available in the following languages: If you feel like contributing, please do so!…
In the few years since its introduction, Netflix’s online video streaming service has grown to serve over 50 million subscribers in 40 countries. We’ve already shared some of the best practices that Netflix’s software development engineers adopted as they…
This post is a cheatsheet with enumeration of options, which should be always used to configure Java Virtual Machine for Web-oriented server applications (i.e. Web Front-End) in production or production-like environments. For lazy readers full listing is…
Download autocompeter.min.css and autocompeter.min.js and insert into your site. Submit your page information to like this: curl -X POST -H "Auth-Key: yoursecurekey" -d url=/some/url -d title="Some Title" https://autocompeter.com/v1 Or by…
With the Apple Watch set for release on April 24, third-party application developers are rushing to write extensions that can run on the device. Now Instagram is sharing some code it wrote for its own app to help others. The Facebook-owned company has…
Object Storage is now available in the Paris FR-PAR region. Discover it now 🇫🇷 By clicking or navigating this website site, you agree to allow our collection of information on Scaleway to offer you an optimal user experience and to keep track of…
EC2 Container Service (ECS) is a new AWS deployment option for Docker containers. It was launched at the AWS Re-Invent conference in November 2014. Its still in a limited preview and its not yet in the AWS web console so you have to use the AWS CLI. The…
When I need to grab a device’s UDID, it has always felt heavy to me to have to launch iTunes or Xcode just to get a simple 40-character string. After years of sighing about it, I finally did something. Below is a simple bash script that uses OS X’s…
February 23rd, 2012. Electronic violinist Lindsey Stirling uploads the official music video for "Crystallize" to YouTube. Two days later, user "riley lux" uploads a video titled "DH long boarding on a windy day." In it, a group of friends enjoy some…
Specifically, companies with a flat structure (no managers at all) are weird. Decades of management tradition tell us that Someone must be in charge and make sure everyone’s doing their work. Otherwise, everyone will goof off, right? And yet, somehow…
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gg helps you work with git more efficiently, saving you keystrokes for your most prized projects. Think of gg as a wrapper for the git commands that you run all the time; a wrapper that adds functionality and is aesthetically pleasing. There's more to…
I've set myself a side project to scrape and display car hire price data, to compare suppliers and trends. I've never done this before and my original goal was to play & learn new skills - but the challenge has become displaying this information in a…
17 Jan 2018 » How To Measure the Working Set Size on Linux home At the last AWS re:Invent, I gave a talk on "Performance Tuning EC2 Instances", where I showed how my team (Performance and Reliability Engineering) tunes Linux EC2 instances at Netflix.…
* Used by ~40,000 packages as of March 1, 2019 $ npm install chalk const chalk = require('chalk'); console.log(chalk.blue('Hello world!')); Chalk comes with an easy to use composable API where you just chain and nest the styles you want. const chalk =…
HTTP2 will mean a change in how we should build websites. The best practices of HTTP1 are harmful in a HTTP2 world. HTTP1 is slow and inefficient for the majority of today's use cases on the web. HTTP1.x is the version of HTTP we are all familiar with.…
This is more of a “write here so I do not forget” kind of post. I set out trying to make a simple “maintenance” mode for a REST API (that speaks only JSON) without having to handle it in the code base. nginx has a really cool support for maintenance mode…
The primary purpose of a password is to serve as an unique verification identifier for a given user. Ideally, the password for a given website or service should be both random and unique; if the letters and/or numbers in the password follow any patterns,…
Integration of all of the above Symbian, Qt, Meego, Android, Windows Phone 7 (the new Lumia phones are 7.5), iPhone, iPad Also, we will be ready to move on to Windows Phone 8 when it's released early next year or so. We can work very smoothly with…
WARNING git-annex support on GitLab EE was deprecated in GitLab 8.17 (2017/02/22), and was permanently removed in GitLab 9.0 (2017/03/22). Read through the migration guide from git-annex to git-lfs. Updated on 2017/04/04. The biggest limitation of git…
A walkthrough of writing a basic compiler with LLVM. No prior experience assumed. In a short space of time, I was able to go from zero C++ knowledge, and no experience with LLVM, to a fully-fledged compiler. It’s a lot of fun, let me show you how! Our…
Just copy and paste the email regex below for the language of your choice. Feeling hardcore (or crazy, you decide)? Read the official RFC 5322, or you can check out this Email Validation Summary. Note there is no perfect email regex, hence the 99.99%. Try…
After receiving quite a few reports from users of www.frida.re of kernel panic upon attaching the second time to a process, I finally got around to debugging the kernel to figure out what was going on. First, a little background. Frida hooks function…
Wayfair Engineering places special emphasis on software testing as a means of maintaining stability in production. The DevTools team, which I am a member of, has built and integrated a number of tools into our development and deploy process in order to…
Some of the major improvements in Solr 5 include: * New, and restructured, example Config Sets available by default * SolrJ now has first class support for the Collections API * Implicit registration of /replication, /get, and /admin/* request handlers …
With tens of thousands of fonts in circulation, it’s tough to identify a specific font from memory, when you see it. Fortunately, you don’t have to—there are free websites, and an iOS app, that can identify font samples for you on the fly. The process is…
I'm going to describe a common frontend/backend split design. Try to visualize it and see if it resembles anything you may have run, built, or relied on over the years. Then see if you've encountered the "gotcha" that I describe later on. Let's say…
Look out, Cisco. Facebook is now running on computer networking gear designed by the company’s own engineers. According to Najam Ahmad, who oversees network engineering at Facebook, the company is using its own designs inside at least some of the data…
A 100-year-old font foundry gets into the smart-watch game. The post This New Technology Will Make Fonts Look Great on Small Screens appeared first on WIRED.
This software generates a teletext signal in software. No hardware mods are needed. This support both PAL (Teletext) and NTSC (CEA608 format captions). Have a Raspberry Pi connected to a TV by composite video. It doesn't matter if you are running X or…
When your Mac starts acting up, you’ll probably run through some common troubleshooting procedures, such as restarting it, running Disk Utility, and perhaps performing a Safe Boot. Your repair repertoire should also include a couple of additional…
Why on earth would a developer want to contribute to an open source project? We ran a study on this a little while ago¹. The reasons are all quite simple, and of course are different for many people. We can broadly categorize the type of contributor into…
Thus far, this series has looked at Linux distributions that are optimized for network-attached storage (NAS) deployments. This installment will take a slightly different turn: the system under review (FreeNAS) is indeed a free distribution for NAS…
Webseclab contains a sample set of web security test cases and a toolkit to construct new ones. It can be used for testing security scanners, to replicate or reconstruct issues, or to help with investigations or discussions of particular types of web…
Information here maybe outdated. Please visit http://sequencer.io for latest. This is part 1 of the sequence series. * Part 1 is about the high performance parser that can parse 100,000-200,000 MPs. * Part 2 is about automating the process of reducing…
Amazon Web Services™ are available in several regions. Click the button below to estimate the latency from your browser to each AWS™ region. Amazon Web Services and AWS are trademarks of Amazon.com, Inc. or its affiliates in the United States and/or…
Montage the world from the command-line with Google and Instagram All the menial JSON parsing we've had to do…there is a reason for the suffering (though maybe not an end to it): if we can read and access this nearly ubiquitous data format, then we have…
All your multi-cloud applications connected via a secure and dedicated private networkGlobal SD-WAN enabled Network Backbone with PoPs all over the worldReplace and widen the scope of your legacy MPLS with simple and intuitive connectivity across cloud…
It requires Jekyll to be installed. GitLab Pages will build Jekyll sites or simply copy content from non-jekyll sites to publicPagesDir. Create a SSH key pair for GitLab to use as deploy keys. ssh-keygen -t rsa -C "[email protected]" -f…
Few design projects are as nerve-wracking—and important—as designing your own business card. Just like the clothes you wear, your business card tells the recipient if you’re professional, artistic, or a big ol’ ball of cheese. Aside from the aesthetic…
An update to 1Password brings time-based one-time passwords (TOTP for short) to its iOS app. A one-time password is typically used as a second element in two-factor authentication (2FA), a subject I’ve written about many times in this column. But, as noted…
How 6 of the world’s largest companies use Kub + Sysdig. Having worked for several years in the wireless networking space, I always found spectrum analyzers like this one extremely useful. I always found such a representation of the wireless spectrum not…
Firefox and Chrome have implemented WebRTC that allow requests to STUN servers be made that will return the local and public IP addresses for the user. These request results are available to javascript, so you can now obtain a users local and public IP…
RegViz is a tool for debugging JavaScript regular expressions in a visual way. The goal of the project is to create a system to make regular expressions more readable. Advanced highlighting helps you to understand the…
IN “Romeo and Juliet,” the young Miss Capulet poses one of literature’s most famous questions: “What’s in a name?” When it comes to a street name, the answer is: a lot. Street names tell stories. They tell us if a neighborhood is expensive or affordable,…
For months when speaking with customers I have been positioning Percona Cloud Tools (PCT) as a valuable tool for the DBA/Developer/SysAdmin but only recently have I truly been able to harness the data and make a technical recommendation to a customer that…
