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Understanding ETF “Flash Crashes”
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The latest blog posts to take off on Hacker News. 199 posts.
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YC Stats
We get asked (a lot) for statistics on the YC portfolio about valuation and fundraising. Although these are very imperfect indicators of success, here they are. All of these companies actually went through a YC batch and got their start with us (e.g. we do not include Quora). Also, the YC application for the next…
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Sharding Pinterest: How we scaled our MySQL fleet
Building the platform where people around the world come to search, save and shop
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Call Me Maybe: Chronos
Chronos is a distributed task scheduler (cf. cron) for the Mesos cluster management system. In this edition of Jepsen , we’ll see how simple network interruptions can permanently disrupt a Chronos+Mesos cluster
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Google’s S2, geometry on the sphere, cells and Hilbert curve
Update - 05 Dec 2017: Google just announced that it will be commited to the development of a new released version of the S2 library, amazing news, repository can be found here. Google's S2 library is a real treasure, not only due to its capabilities for spatial indexing but also because it is a library that
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Building the Next New York Times Recommendation Engine
Alexander Spangher discusses recent work that’s been done to revamp our article recommendation algorithm.
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RethinkDB 2.1 is out: high availability
Today we’re proud to announce RethinkDB 2.1 ( Forbidden Planet ). Download it now !
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The technology behind preview photos
Visit the post for more.
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Apache Kafka, Samza, and the Unix Philosophy of Distributed Data
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Getting started with maps in Python
Kristoffer over at rpsychologist.com wrote a really nice tutorial on getting up to speed with maps in R. It looked something like this.
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Don't test with SQLite when you use Postgres in Production
Yesterday, I was looking for some help trying to have a clean way to roll back database transactions at the end of a test in a Python TestC...
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How to create NBA shot charts in Python
In this post I go over how to extract a player's shot chart data and then plot it using matplotlib and seaborn .
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SQLite Release 3.8.11.1
A complete list of SQLite releases in a single page and a chronology are both also available. A detailed history of every check-in is available at SQLite version control site .
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Amazon Aurora Now Available
We announced Amazon Aurora last year at AWS re:Invent (see Amazon Aurora – New Cost-Effective MySQL-Compatible Database Engine for Amazon for more info). With storage replicated both within and across three Availability Zones, along with an update model driven by quorum writes, Amazon Aurora is designed to deliver…
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Some analysis of the 1M most popular sites on the web
Over the last couple of weeks I’ve run some analysis on the one million most popular sites on the web.
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Finding MongoDB instances without any authentication
I would like to take a moment to discuss databases. Most people use Shodan to find devices that have web servers, but for a few years now I've also been crawling the Internet for various database software. I usually mention this during my talks and I've tried to raise awareness
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Pyxley: Python Powered Dashboards
Web-based dashboards are the most straightforward way to share insights with clients and business partners. For R users, Shiny provides a framework that allows data scientists to create interactive web applications without having to write Javascript, HTML, or CSS. Despite Shiny’s utility and success as a dashboard…
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RethinkDB 2.1 beta: automatic failover with Raft
The upcoming 2.1 release will introduce important improvements , including support for automatic failover. Although we’re still hard at work on the finishing touches that will make the new features ready for production use, the beta offers an opportunity to get an early look.