Data

Couchbase, a startup selling a NoSQL database of the same name, has raised a $25 million series D round. Adams Street Partners led the round and was joined by existing investors Accel Partners, Mayfield Fund, North Bridge Venture Partners and Ignition Partners. Couchbase doesn’t have the huge user base of MongoDB or the edginess of HBase, but it does have some big-name users (including Orbitz) and the company claims sales jumped 400 percent in the last year.

Hadoop-based analytics startup Tresata last week open sourced a set of machine learning libraries built on Scalding and designed to run in Hadoop and make use of the Apache Mahout project. Tresata is calling the project Ganita, and has also written a couple of explanatory blog posts about it, including how to do k-means clustering. The barriers to doing good work on big data just keep getting lower.

For some time now, Foursquare has been fighting its critics by arguing that it is building the “location layer for the internet.” It has followed through on some of that claim by integrating itself into Instagram and other services, but now it could be on the verge of something much bigger: sources tell BuzzFeed it is close to signing a significant data deal with Yahoo.

A database vendor called Objectivity has created a mobile app called GraphMyLife that aims to let consumers explore links between the people and content in their various social networks. I say “aims” because although the idea is pretty cool, the app is a bit laggy and confusing (at least on my phone). But cut Objectivity a break: it’s a specialized (and old) enterprise-tech company trying to humanize its graph database software.

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