People say that security is hard and that’s exactly why we have a dedicated security team here at Yelp! We place tremendous importance on securing our environment, our employees and the millions of visitors who trust Yelp every month. Information Security is not a solo endeavor. You have to exchange information with fellow security engineers and researchers, get informed of new vulnerabilities and threats and build a “web of trust” containing security practitioners that you can count on. “Community” is the keyword in this case. This is why we are officially sponsoring Security BSides Las Vegas 2014! BSides is a...

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The Challenge The Yelp Dataset Challenge provides the academic community with a real-world dataset over which to apply their research. We encourage students to take advantage of this wealth of data to develop and extend their own research in data science and machine learning. Students who submit their research are eligible for cash awards and incentives for publishing and presenting their findings. The most recent Yelp Dataset Challenge (our third round) opened in February 2014, giving students access to our Phoenix Academic Dataset, with reviews and businesses from the greater Phoenix metro area. In the fourth round, open now, we are expanding...

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At Yelp we run a lot of A/B tests. By constantly trying new features and testing their impact, we are able to continue evolving our products and make them as useful as possible. However, running online A/B tests can be expensive (in opportunity cost, user experience, or revenue) and time consuming (to achieve statistical significance). Furthermore, many A/B tests boil down to parameter selection (more of an A/A’ test, where a feature stays the same, and only the parameters change). Given a feature, we want to find the optimal configuration values for the constants and hyperparameters of the feature as...

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May brings us talks from the Python meetup, another mind-blowing talk from Designers + Geeks, and a talk from Products That Count on brand naming. I’m also excited to give you a sneak peak into June: we’re hosting our second annual WWDC after party. We promise this after party will be so good, you won’t want to leave for the hotel lobby (even if R. Kelly himself invites you). For our Pythonista readers, let’s take a deeper look into the the upcoming Python meetup. Packaging turns out to be an important part of any language. Great packaging encourages language adoption,...

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What’s that you say? Your Ruby applications are feeling a little empty and meaningless without Yelp data to make them shine? Well, consider your prayers answered because today we’re launching our official Ruby Gem for interfacing with the Yelp API! Find the gem online now, and start using Yelp data in your Ruby applications with ease. Install the gem with bundle by adding ‘yelp’ to your Gemfile, or without a Gemfile by running gem install yelp. Your first step on the road to Yelp data awesomeness is to register and get API keys from our developer site. Next, create a...

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Yelp is hosting many exciting talks this month! Let’s take a closer look at two, but be sure to check out all of the links below to see what’s in the pipeline. What does it take to monitor an architecture that is continually in flux and being changed by hundreds of developers? A seriously flexible monitoring framework: Sensu! A resident Yelp Site Reliability Engineer, Kyle Anderson, will be giving a tour of how Sensu works at Yelp. He’ll be explaining how Sensu hooks into the Yelp SOA architecture to empower individual development teams to monitor their own services in real...

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pre.mysql-block { overflow-x: auto; margin: 0 0 1em 1em; } At Yelp, we use MySQL replication to provide the performance we need to serve our 120 million monthly unique visitors. In this post Josh Snyder walks us through some of the internals of MySQL’s replication system, and discusses an issue that we saw in production. MySQL replication and the slave I/O thread’s purpose On a MySQL slave, the task of replication is split between two threads: the I/O and SQL threads. The I/O thread’s job is to download the log of events executed on the master and write them to...

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Love Python but can’t make it all the way to Montreal for PyCon this year? Never fear, Yelp is hosting a sneak peak of many of the talks! Instead of buying plane tickets, a hotel room, and a conference pass, you can kick back, drink beer, and have pizza with us! Next week’s Python meetups, both PyLadies and SF Python, will be hosting practice talks for the conference. Let’s dive into two of the talks: a novice session on machine learning, and an intermediate talk on working with external languages. At a high level, Melanie Warrick will get us started...

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