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Category: Civil Engineering

Netflix FlameScope – Netflix TechBlog – Medium

We’re excited to release FlameScope: a new performance visualization tool for analyzing variance, perturbations, single-threaded execution, application startup, and other time-based issues. It has been created by the Netflix cloud performance engineering team and just released as open source, and we welcome help from others to develop the project further. (If it especially interests you, you might be interested in joining Netflix to work on it and other projects.) FlameScope combines a subsecond-offset heatmap for navigating a profile with flame…

Scaling Uber’s Hadoop Distributed File System for Growth

Three years ago, Uber Engineering adopted Hadoop as the storage (HDFS) and compute (YARN) infrastructure for our organization’s big data analysis. This analysis powers our services and enables the delivery of more seamless and reliable user experiences. We use Hadoop for both batch and streaming analytics across a wide range of use cases, such as fraud detection, machine learning, and ETA calculation. As Uber’s business grew over the last few years, our volume of data and the associated access loads…

Cognitive system for the predictive maintenance of production facilities

Demonstrator Hanover Trade Fair: configured wireless sensor nodes (in the foreground) send status messages of the axial piston pump (left) to a tablet. Credit: Fraunhofer IDMT At the Hanover Trade Fair from April 23 – 27, 2018, Fraunhofer will demonstrate the prototype of a new cognitive system for the predictive maintenance of production facilities. Intelligent battery-powered acoustic sensors process audio signals from machines and systems on the spot. From the information that is forwarded wirelessly to an evaluation unit, it…

A bridge so far: China’s controversial megaproject

A bridge to somewhere: The project linking Hong Kong, Macau and mainland china is 55 kilometres long and contains enough steel to build 60 Eiffel Towers Touted as an engineering wonder, the world’s longest sea bridge, which connects Hong Kong, Macau and mainland China, includes a snaking road crossing and an underwater tunnel and reportedly uses enough steel to build 60 Eiffel Towers. Nine years after construction began on the 55-kilometre (34-mile) crossing, a preview organised by the Chinese government…

Building Check-In Queuing & Appointment Scheduling for In-Person Support at Uber

With over 700 locations worldwide, Uber’s Greenlight Hubs (GLH) provide in-person support for driver-partners for everything from account and payment issues to vehicle inspections and driver onboarding. To create better experiences for driver-partners and improve customer satisfaction, Uber’s Customer Obsession Engineering team built an in-house customer support system, a solution that has led to more streamlined and quicker support ticket resolution through GLHs. This customer support system consists of two main features: a check-in queuing system for our service experts to…

Open Source at Uber: A Conversation with Nicolas Garcia Belmonte, Head of Visualization

In college, Nicolas Garcia Belmonte became interested in visualization engineering, and developed the JavaScript InfoVis Toolkit, a set of tools for creating interactive data visualizations on the web. In addition to making data visualization more accessible, open sourcing that project gave him global recognition, letting him travel from his native Argentina to conferences around the world. For the last three years, Belmonte has worked at Uber, rising to his current position as Head of Visualization, and helping create open source…

Engineering Ethics Blog: The FIU Bridge Collapse: More Questions Than Answers

On Thursday, March 16, workers on a newly installed span of a pedestrian bridge across the busy seven-lane Southwest Eighth Street that divides Florida International University (FIU) from the adjacent town of Sweetwater were adjusting some tensioning cables in the span.  The Saturday before, Barnhart Crane & Rigging Company had lifted the span from the side of the road where it had been built over the preceding months, carried it a short distance along the closed street, and lowered it…

Search Federation Architecture at LinkedIn

Co-authors: Yi Shen, Claire Liu, and Ali Mohamed Introduction: A brief history of Search Federation at LinkedIn Almost every part of LinkedIn contains data that needs to be discoverable by our members or customers. Use cases range from a member looking up a news article posted by someone in their network to a recruiter looking for candidates on the platform. One of the primary mechanisms for discovering this content is search. Accordingly, at LinkedIn, we have many different search engines…

Scaling Infrastructure Management with Grail

To build and maintain infrastructure at scale, easy access to the current state of the system is paramount. As Uber’s business continues to expand, our infrastructure has grown in size and complexity, making it more difficult to get all the information we need, when we need it. In order to solve this problem, we built Grail, a platform that enables us to aggregate the current state of our infrastructure into a single global view, spanning all zones and regions. Grail…

How We’re Using Codable Protocol in Swift 4

At Wayfair, we’re keen to research, innovate, and invest in new technologies whenever the  opportunity arises. There are obvious advantages to this approach for our iOS teams in particular: It allows us to keep up to date with current developments and be prepared for potential API updates. This is particularly important for the Apple ecosystem, where technology changes every year bringing about newer and more reliable APIs for developers and users alike. We recently started exploring one such technology on…