The OPeNDAP and Remote NetCDF Invocation (RNI) middleware platform for Scientific Data Fusion

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Presented at the AGU Fall Meeting 2008

Abstract:

Across geosciences, there are large data holdings being made available via the DAP protocol by means of OPeNDAP software. A lot of the underlying data are in the NetCDF format. Often, each individual dataset is a combination of hundreds of individual NetCDF files. Requesting such datasets for analysis is an expensive data fusion transaction, especially as the number and size of datasets increase. We present a set of solutions that instead request needed portions of the dataset fused just-in-time. The fusion includes both subsetting and agreggation operations as well as analysis and data manipulation steps. We have modified the NetCDF C library for Remote NetCDF Invocation (RNI), that is, to operate on remote dataset, over HTTP, HTTPS or gsiFTP (or any) protocols, individual NetCDF Application Programming Interface (API) calls as if they were local. This invocation model also can be applied to OPeNDAP data streams and local files. This mechanism resembles the well known Remote Procedure Call (RPC) yet it radically differs on the binding between local and remote operations. We describe our current approach, implementation and benefits obtained from this approach and indicate how it aids data fusion.

History

DateCreated ByLink
July 13, 2011
13:08:34
Stephan ZednikDownload

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Earth System Grid - Center for Enabling Technologies (ESG-CET)
Principal Investigator: Peter Fox and Dean Williams
Description: The Earth System Grid (ESG) integrates supercomputers with large-scale data and analysis servers located at numerous national labs and research centers to create a powerful environment for next generation climate research. Access to ESG is provided through a system of federated Data Gateways, that collectively allow access to massive data and services for Climate Global and Regional Models, IPCC research, and analysis and visualization software. The Earth System Grid - Center for Enabling Technologies (ESG-CET) is funded by the U.S. Department of Energy as part of the SciDAC (Scientific Discovery through Advanced Computing) program. At the heart of the Earth System Grid is the need for access and transport of various data products. These products are produced and consumed in many and varied parts of the ESG architecture, including on data nodes, gateway nodes, clients and federated sites. The RPI effort involves secure, high-performance access and transport of data within the ESG-CET framework.
TW LogoOPeNDAP
Description: Tasks for various TWC projects related to data access and the OPeNDAP software products.

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