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File and Object Replication in Data Grids

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Abstract

Data replication is a key issue in a Data Grid and can be managed in different ways and at different levels of granularity: for example, at the file level or object level. In the High Energy Physics community, Data Grids are being developed to support the distributed analysis of experimental data. We have produced a prototype data replication tool, the Grid Data Mirroring Package (GDMP) that is in production use in one physics experiment, with middleware provided by the Globus Toolkit used for authentication, data movement, and other purposes. We present here a new, enhanced GDMP architecture and prototype implementation that uses Globus Data Grid tools for efficient file replication. We also explain how this architecture can address object replication issues in an object-oriented database management system. File transfer over wide-area networks requires specific performance tuning in order to gain optimal data transfer rates. We present performance results obtained with GridFTP, an enhanced version of FTP, and discuss tuning parameters.

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Authors and Affiliations

  1. European Organization for Nuclear Research, CERN, CH-1211, Geneva 23, Switzerland

    Heinz Stockinger & Brian Tierney

  2. Institut for Computer Science and Business Informatics, University of Vienna, A-1010, Vienna, Austria

    Heinz Stockinger

  3. California Institute of Technology, Pasadena, CA, 91125, USA

    Asad Samar & Koen Holtman

  4. Mathematics and Computer Science Division, Argonne National Laboratory, IL, 60439, USA

    Bill Allcock & Ian Foster

Authors
  1. Heinz Stockinger
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  2. Asad Samar
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  3. Koen Holtman
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  4. Bill Allcock
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  5. Ian Foster
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  6. Brian Tierney
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Stockinger, H., Samar, A., Holtman, K. et al. File and Object Replication in Data Grids. Cluster Computing 5, 305–314 (2002). https://doi.org/10.1023/A:1015681406220

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