NoSQL: The Backstory of Yahoo and Hadoop

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The Backstory of Yahoo and Hadoop

We currently have nearly 100 people working on Apache Hadoop and related projects, such as Pig, ZooKeeper, Hive, Howl, HBase and Oozie. Over the last 5 years, we've invested nearly 300 person-years into these projects. […] Today Yahoo runs on over 40,000 Hadoop machines (>300k cores). They are used by over a thousand regular users from our science and development teams. Hadoop is at the center of our research in search, advertising, spam detection, personalization and many other topics.


via NoSQL databases