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Category: Computer Engineering

Continuous integration and deployment with Bazel

Dropbox server-side software lives in a large monorepo. One lesson we’ve learned scaling the monorepo is to minimize the number of global operations that operate on the repository as a whole. Years ago, it was reasonable to run our entire test corpus on every commit to the repository. This scheme became untenable as we added more tests. One obvious inefficiency is the pointless and wasteful execution of tests that can’t possibly be affected by a particular change. We addressed this…

An Engineer Among the Stars

Dick Richards, Mission Commander of STS-64 aboard the Space Shuttle Discovery in September 1994, reviewing flight data. Graduating seniors at the College of Engineering’s 2019 Commencement ceremony in the Hearnes Center Dec. 13 will hear from a Mizzou alumnus who has seen the Earth from a unique vantage point: 200 to 330 miles above the surface on the planet aboard the U.S. Space Shuttle. Captain Dick Richards, U.S. Navy-retired, earned his BS in chemical engineering from Mizzou in 1969 and…

a Slack proxy and Slack bot framework

We’re pleased to announce the initial open source release of omnibot: a Slack proxy, and Slack bot framework. We’re also releasing a python receiver library and a simple example service, eventbot, to show how the proxy works end-to-end. Over time Slack has added a number of APIs for writing integrations. The Real Time Messaging (RTM) API was the primary API in the past, and now the Event Subscription and Web APIs are recommended; however, full Slack integration functionality is spread…

Netflix Hack Day — Fall 2019 – Netflix TechBlog

Nostalgiflix is a chrome extension that transforms your Netflix web browser into an interactive TV time machine covering three decades (80’s, 90’s, and 00’s.) By dragging the UI slider around, you can view titles originally released within the selected year ( based on their historic box office and episode air dates.) More importantly you can also adjust the video filters in real-time to creatively downgrade the viewing experience, further enhancing the nostalgic effect. We think this feature could encourage our…

Building an Open-source Distributed Delayed Job Queueing System

Asynchronous background jobs can often dramatically improve the scalability of web applications by moving time-consuming, resource-intensive tasks to the background. These tasks are often prone to failures, and retrying mechanisms often make it even more expensive to operate applications with such jobs. Having a background queue helps the web servers handle incoming web requests promptly, and reduces the likelihood of performance issues that occur when requests become backlogged. At Airbnb, we built a job scheduling system called Dynein for very…

Productionizing Distributed XGBoost to Train Deep Tree Models with Large Data Sets at Uber

Michelangelo, Uber’s machine learning (ML) platform, powers machine learning model training across various use cases at Uber, such as forecasting rider demand, fraud detection, food discovery and recommendation for Uber Eats, and improving the accuracy of estimated times of arrival (ETAs).  As Michelangelo’s increasingly deep tree models create larger data sets, the efficient training of distributed gradient boosting (GBD) algorithms becomes evermore challenging. To prevent training latencies at Uber, we leverage Apache Spark MLlib and distributed XGBoost‘s efficient all-reduce based…

Preparing for the 2020 Elections.

Two years ago, Cloudflare launched its Athenian Project, an effort to protect state and local government election websites from cyber attacks. With the two-year anniversary and many 2020 elections approaching, we are renewing our commitment to provide Cloudflare’s highest level of services for free to protect election websites and ensure the preservation of these critical infrastructure sites. We started the project at Cloudflare as it directly aligns with our mission: to help build a better Internet. We believe the Internet…

How we mapped the “skills genome” of emerging jobs

Skills as encoders of economic opportunity Skills are the building blocks of human capital. A job is increasingly defined by the skills people use to perform necessary tasks and responsibilities. Information like what skills uniquely constitute a job, what skills differentiate one job from another, and how the unique skills needed for a job are changing could all be essential information to understand a role. Answers to these questions can be useful to a wide range of different groups: Students…

Now available to all paid plans

Our Firewall Analytics tool enables customers to quickly identify and investigate security threats using an intuitive interface. Until now, this tool had only been available to our Enterprise customers, who have been using it to get detailed insights into their traffic and better tailor their security configurations. Today, we are excited to make Firewall Analytics available to all paid plans and share details on several recent improvements we have made. All paid plans are now able to take advantage of…

SubX, a research-to-operations project, shows promise for improved monthly forecasts — ScienceDaily

Scientists working on the next frontier of weather forecasting are hoping that weather conditions 3-to-4 weeks out will soon be as readily available as seven-day forecasts. Having this type of weather information — called subseasonal forecasts — in the hands of the public and emergency managers can provide the critical lead time necessary to prepare for natural hazards like heat waves or the next polar vortex. Scientists like University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science Professor…