NDLI: Supporting computational data model representation with high-performance I/O in parallel netCDF

Content Provider	IEEE Xplore Digital Library
Author	Kui Gao Chen Jin Choudhary, A. Wei-keng Liao
Copyright Year	2011
Description	Author affiliation: Electrical Engineering and Computer Science Department, Northwestern University (Kui Gao; Chen Jin; Choudhary, A.; Wei-keng Liao)
Abstract	Parallel computational scientific applications have been described by their computation and communication patterns. From a storage and I/O perspective, these applications can also be grouped into separate data models based on the way data is organized and accessed during simulation, analysis, and visualization. Parallel netCDF is a popular library used in many scientific applications to store scientific datasets and provides high-performance parallel I/O. Although the metadata-rich netCDF file format can effectively store and describe regular multi-dimensional array datasets, it does not address the full range of current and future computational science data models. In this paper, we present a new storage scheme in Parallel netCDF to represent a broad variety of data models used in modern computational scientific applications. This scheme also allows concurrent metadata construction for different data objects from multiple groups of application processes, an important feature in obtaining a high degree of I/O parallelism for data models exhibiting irregular data distribution. Furthermore, we employ non-blocking I/O functions to aggregate irregularly distributed data requests into large, contiguous data requests, to achieve high-performance I/O. Using an example of adaptive mesh refinement data model, we demonstrate the proposed scheme can produce scalable performance results for both data and metadata creation and access.
Starting Page	1
Ending Page	10
File Size	744935
Page Count	10
File Format	PDF
ISBN	9781457719516
e-ISBN	9781457719509
e-ISBN	9781457719493
DOI	10.1109/HiPC.2011.6152746
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-12-18
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Data models Arrays Libraries Parallel processing Collaboration Distributed databases Optimization Data Model Parallel I/O Parallel netCDF
Content Type	Text
Resource Type	Article

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