Use of Numerical Models as Data Proxies for Approximate Ad-Hoc Query Processing

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As datasets grow beyond the gigabyte scale, there is an increasing demand to develop techniques for dealing/interacting with them. To this end, the DataFoundry team at the Lawrence Livermore National Laboratory has developed a software prototype called Approximate Adhoc Query Engine for Simulation Data (AQSim). The goal of AQSim is to provide a framework that allows scientists to interactively perform adhoc queries over terabyte scale datasets using numerical models as proxies for the original data. The advantages of this system are several. The first is that by storing only the model parameters, each dataset occupies a smaller footprint compared to ... continued below

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Kamimura, R; Abdulla, G; Baldwin, C; Critchlow, T; Lee, B; Lozares, I et al. May 19, 2003.

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As datasets grow beyond the gigabyte scale, there is an increasing demand to develop techniques for dealing/interacting with them. To this end, the DataFoundry team at the Lawrence Livermore National Laboratory has developed a software prototype called Approximate Adhoc Query Engine for Simulation Data (AQSim). The goal of AQSim is to provide a framework that allows scientists to interactively perform adhoc queries over terabyte scale datasets using numerical models as proxies for the original data. The advantages of this system are several. The first is that by storing only the model parameters, each dataset occupies a smaller footprint compared to the original, increasing the shelf-life of such datasets before they are sent to archival storage. Second, the models are geared towards approximate querying as they are built at different resolutions, allowing the user to make the tradeoff between model accuracy and query response time. This allows the user greater opportunities for exploratory data analysis. Lastly, several different models are allowed, each focusing on a different characteristic of the data thereby enhancing the interpretability of the data compared to the original. The focus of this paper is on the modeling aspects of the AQSim framework.

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PDF-FILE: 9 ; SIZE: 0.2 MBYTES pages

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  • Joint Conference on Information Science, Cary, NC (US), 09/26/2003--09/30/2003

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  • Report No.: UCRL-JC-153329
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 15005465
  • Archival Resource Key: ark:/67531/metadc1409324

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  • May 19, 2003

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  • Jan. 23, 2019, 12:54 p.m.

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  • Feb. 6, 2019, 3:06 p.m.

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Kamimura, R; Abdulla, G; Baldwin, C; Critchlow, T; Lee, B; Lozares, I et al. Use of Numerical Models as Data Proxies for Approximate Ad-Hoc Query Processing, article, May 19, 2003; California. (https://digital.library.unt.edu/ark:/67531/metadc1409324/: accessed March 25, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.