Selecting the right SQL-on-Hadoop engine to access big data
With SQL-on-Hadoop technologies, it's possible to access big data stored in Hadoop by using the familiar SQL language. Users can plug in almost any reporting or analytical tool to analyze and study the data. Before SQL-on-Hadoop, accessing big data was ...
How to Contribute to HBase and Hadoop2
By Nick Dimiduk
In case you haven’t heard, Hadoop2 is on the way! There are loads more new features than I can begin to enumerate, including lots of interesting enhancements to HDFS for online applications like HBase. One of the most ...
Using Oozie 4.4.0 with Hadoop 2.2
The current version of Oozie (4.0.0) doesn’t build correctly when you try and target Hadoop 2.2. The Oozie team have a fix going into release 4.0.1 (see OOZIE-1551), but until then you can hack the Maven files to get it ...
Pivotal Brings In-Memory Analysis To Hadoop
Pivotal, the EMC spin-off company pursuing modern application development in the context of cloud computing and big-data analysis, on Monday released Pivotal HD 2.0, an update of its Hadoop distribution incorporating an in-memory database and a battery of new analysis ...
Hadoop Alternative Hydra Re-Spawns as Open Source
It may not have the name recognition or momentum of Hadoop. But Hydra, the distributed task processing system first developed six years ago by the social bookmarking service maker AddThis, is now available under an open source Apache license, just ...
Top 12 funded Big Data Startup companies
Big data companies are attracting big investments from venture capitalists. But which startups are garnering the most funding? Venture capitalists made more big data investments than ever before in 2012, and a few more deals have already closed in 2013. ...
Why Big Data Applications Are Already a Reality
The advent of the Internet and World Wide Web changed many things in the technology landscape. Information began to become widely accessible. Individuals began to connect with one another online. Merchants began to market and sell their products digitally, sometimes ...
How YARN Opens Doors to Easier Programming Tools for Hadoop 2.0 Users
The emergence of YARN for the Hadoop 2.0 platform has opened the door to new tools and applications that promise to allow more companies to reap the benefits of big data in ways never before possible with outcomes possibly never ...
Exploring The Hadoop Network Topology
Hadoop is designed to run on large clusters of commodity servers – in many cases spanning many physical racks of servers. A physical rack is in many cases a single point of failure (for example, having typically a single switch ...
Hadoop admin interview questions
Which operating system(s) are supported for production Hadoop deployment?
The main supported operating system is Linux. However, with some additional software Hadoop can be deployed on Windows.
What is the role of the namenode?
The namenode is the "brain" of the Hadoop cluster ...