Hadoop has become the de facto platform for large-scale data analysis in commercial applications, and increasingly so in scientific applications. However, Hadoop's byte stream data model causes inefficiencies when used to process scientific data that is commonly stored in highly-structured, array-based binary file formats resulting in limited scalability of… (More)
In Hadoop mappers send data to reducers in the form of key/value pairs. The default design of Hadoop's process for transmitting this intermediate data can cause a very high overhead, especially for scientific data containing multiple variables in a multi-dimensional space. For example, for a 3D scalar field of a variable “windspeed1” the size… (More)
The <i>MapReduce</i> framework is being extended for domains quite different from the web applications for which it was designed, including the processing of big structured data, e.g., scientific and financial data. Previous work using <i>MapReduce</i> to process scientific data ignores existing structure when assigning intermediate data and scheduling… (More)
High-end computing is increasingly I/O bound as computations become more data-intensive, and data transport technologies struggle to keep pace with the demands of large-scale, distributed computations. One approach to avoiding unnecessary I/O is to move the processing to the data, as seen in Google's successful, but relatively specialized, MapReduce system.… (More)
This paper describes a demonstration of synthetic aperture ladar imaging at 1.5 micron wavelength from an airborne platform at a distance of 1.6 km showing a 30× cross range resolution improvement over the spot size.