Distributed processing and analysis of physics data in the D0 SAM system at Fermilab

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Description

SAM (Sequential Access through Meta-data) is the data access system for the D0 high energy physics (HEP) experiment at Fermilab. The system is being developed and used to handle the Petabyte-scale experiment data. The D0 applications, like virtually all HEP applications, are data-intensive, which poses special problems for the data management and job control facilities in the distributed environment. The fundamental problem is to bring the user applications and the data together, and SAM attacks the problems from both sides. First, we describe how the system moves the data through the distributed disk cache. Second, we describe how SAM interacts ... continued below

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154 Kilobytes pages

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Terekhov, Igor V. August 30, 2001.

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Description

SAM (Sequential Access through Meta-data) is the data access system for the D0 high energy physics (HEP) experiment at Fermilab. The system is being developed and used to handle the Petabyte-scale experiment data. The D0 applications, like virtually all HEP applications, are data-intensive, which poses special problems for the data management and job control facilities in the distributed environment. The fundamental problem is to bring the user applications and the data together, and SAM attacks the problems from both sides. First, we describe how the system moves the data through the distributed disk cache. Second, we describe how SAM interacts with the batch system to synchronize parallel user jobs with the data availability. All the design solutions herein have been implemented in a real system that handles the mission-critical data of the D0 experiment; thus, we present our work from the standpoint of real experience.

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154 Kilobytes pages

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  • Other Information: PBD: 30 Aug 2001

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  • Report No.: FERMILAB-TM-2156
  • Grant Number: AC02-76CH03000
  • DOI: 10.2172/785150 | External Link
  • Office of Scientific & Technical Information Report Number: 785150
  • Archival Resource Key: ark:/67531/metadc715395

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  • August 30, 2001

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • April 1, 2016, 5:23 p.m.

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Terekhov, Igor V. Distributed processing and analysis of physics data in the D0 SAM system at Fermilab, report, August 30, 2001; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc715395/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.