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FCW : April 15, 2013
ExecTe c h run in parallel, there are lots of applications that just don t decompose that way," said Shane Canon, leader of the Technology Integration Group at NERSC. "It may require synchronization between the pieces." Moreover, areas such as high-energy and nuclear phys- ics typically rely on binary data formats, which do not work as well in Hadoop. On the other hand, bioinformatics is well-suited to Hadoop because the data comes from a sequencer and needs to be compared to a reference database for similarities. "That s something that ts well into a map model," Canon said. In two years of working with Hadoop, NERSC lead- ers have found that rather than establishing dedicated clusters, users have the most success by bringing up a Hadoop cluster, running their applications and then tearing down the cluster --- even though they miss out on some of the positive features of Hadoop. That could change as the technology evolves and more user-friendly applica- tions are created. A survey by the Data Warehousing Institute found an average of 45 machines in a Hadoop cluster, with a median of 12, suggesting the existence of a few extremely large clusters. "You re not going to see the bene t until you re running a larger environment," said David Jonker, SAP s director of product marketing for big data. "The true bene t of Hadoop is when you have multiple machines together." Hadoop appeals to IT leaders because of the improved performance, scalability, exibility, ef ciency, extensibility and fault tolerance it offers, said Glenn Tamkin, a software engineer at the NASA Center for Climate Simulation. Users can dump all their data into the framework without refor- matting it, which lifts a huge burden off NASA scientists working with 32 years of climate data. The center has 36 nodes in its Hadoop cluster and envi- sions scaling up, Tamkin said, who added that potential Hadoop converts still have to understand the data and know whether Hadoop is an appropriate solution. "Make sure that your base design or format is able to solve your use cases," he said. "If you make a wrong decision, you re kind of hosed." Nevertheless, any skeptic need only look at how the Defense Department is using Hadoop to provide real-time tactical information for battle eld missions and intelli- gence operations. Or the genome sequencing that can now be accomplished in a few minutes instead of hours. "We ve found it a really exciting technology to work with and investigate," said Deb Agarwal, head of the Advanced Computing for Science Department at Law- rence Berkeley. "Sure, there are places where it doesn t t our paradigms well, but it helps point us to areas where we could make improvements." ■ 32 April 15, 2013 FCW.COM J C u f u u u f . u W u u f u u f v H u m -- u v f H v u u u m u SPONSORED B BROUGHT TO OU B R R www w t ty www w t ty R R W F W P 16 @ 2P A
March 30, 2013
April 30, 2013