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Author: engineering

Reykjavík, Cloudflare’s northernmost location

Iceland is a small country in Northern Europe, a land of active volcanoes and boiling hot geysers. The geology and climate creates unique conditions for running compute power. With an abundance of green electricity and natural cooling, many companies are placing high power machines in Iceland to run power intensive, heat generating operations. Reykjavík is our 125th location globally. Connecting to the rest of the world A unique aspect about Iceland relates to how it connects to the Internet, being…

HTTP Analytics for 6M requests per second using ClickHouse

One of our large scale data infrastructure challenges here at Cloudflare is around providing HTTP traffic analytics to our customers. HTTP Analytics is available to all our customers via two options: Analytics tab in Cloudflare dashboard Zone Analytics API with 2 endpoints In this blog post I’m going to talk about the exciting evolution of the Cloudflare analytics pipeline over the last year. I’ll start with a description of the old pipeline and the challenges that we experienced with it.…

Rattan Khosa gifts to University of Chicago Both School of Business

Rattan Khosa makes a gift to establish the “Rattan L. Khosa Students Entrepreneur Program” at the Polsky Center for Entrepreneurship.  The new program consists of four components: The Rattan L. Khosa First-Place Prize at the Edward L. Kaplan, ’71, New Venture Challenge: The majority of the total gift will be used to endow the first place award for the nationally-ranked annual Edward L. Kaplan, ’71 New Venture Challenge. For 2018, the winning team or individual will be awarded at least $150,000; in subsequent…

NAT To Be Missed At SXSW

We’re at the EDGE of our seats, about to LANd in Austin, Texas in route for SXSW. (TKIP, hip, hooray!) ARP you going to be there? We R going to have three epoch sessions by Cloudflare speakers. Ifdown, seems apt you could SELECT to JOIN. Cat make it? Not a bg deal, wget it (though it mega hertz we won’t C you). All the audio from the three sessions will be recorded, you can listen to the cd. WPS! I…

Rigor mortis in worms offers new insight into death — ScienceDaily

A dying worm experiences rigor mortis early in the death process, rather than after the main event as it is for humans, according to a new study by an international team of scientists at UCL and Washington University. The study, published in the journal Cell Reports, is the first discovery of rigor mortis in worms and provides new insight into the process of ‘organismal’ death. In legal and medical terms, death is defined as the moment at which the heart…

Engineering team develops radiation-resistant computers capable of high-performance computing in the harshness of space

The Pitt H6 system’s dual high-resolution cameras can take 2448 x 2050 pixel images of Earth from the International Space Station Credit: Swanson School of Engineering In T minus 8,760 hours, or roughly one year, the Space Test Program-Houston 6 (STP-H6) hybrid and reconfigurable space supercomputer will board the International Space Station. The newest mission to the ISS featuring research and technology from the University of Pittsburgh’s NSF Center for Space, High-performance, and Resilient Computing (SHREC) will bring an unprecedented…

Ask a CTBUH Expert : Neel Khosa – Why Unbonded Post-Tensioned Concrete

The following is an article published in the CTBUH Journal 2018 Issue I.  Download a PDF version of article here. Why Unbonded Post-Tensioned Concrete?Neel Khosa, AMSYSCO, Inc.CTBUH Journal 2018 Issue I Why has unbonded post-tensioned concrete become the predominant structural material in US skyscrapers, and what are the barriers to adoption elsewhere? ____________________________________________ Copyright © 2018 by AMSYSCO, Inc. All rights reserved. This entry was posted in Post Tension and tagged ctbuh, Neel Khosa, Post Tension, skyscraper. Bookmark the permalink. Source link…

Tumblr Engineering — Using srcset and sizes to make responsive HTML5…

As a platform that prides itself on being a home for artists and creatives alike, it only makes sense that we allow our users to fully customize their Tumblrs to fully express themselves. Here at Tumblr, the world is your oyster not only in terms of looks but also in how you create your theme. I wanted to demonstrate how you too can develop a theme using Redux and React. Since there are plenty of docs and tutorials on how…

The real cause of large DDoS

A week ago we published a story about new amplification attacks using memcached protocol on UDP port 11211. A few things happened since then: Let’s take a deep breath and discuss why such large DDoS attacks are even possible on the modern internet. Large attacks use IP spoofing CC BY-SA 2.0 image by DaPuglet All the gigantic headline-grabbing attacks are what we call “L3” (Layer 3 OSI[1]). This kind of attack has a common trait – the malicious software sends…

Istanbul (not Constantinople): Cloudflare’s 124th Data Center

Cloudflare is excited to turn up our newest data center in Istanbul, Turkey. This is our 124th data center globally (and 62nd country), and it is throwing a curveball in our data center by continent tracking. Istanbul is one of the only cities in the world to span two continents: Europe and Asia. Technically, we’ll specify this is our 34th data center in Europe. In the coming weeks, we’ll continue to attract more traffic to this deployment as more networks…