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Title: New capabilities in the HENP grand challenge storage access systemand its application at RHIC

Abstract

The High Energy and Nuclear Physics Data Access GrandChallenge project has developed an optimizing storage access softwaresystem that was prototyped at RHIC. It is currently undergoingintegration with the STAR experiment in preparation for data taking thatstarts in mid-2000. The behavior and lessons learned in the RHIC MockData Challenge exercises are described as well as the observedperformance under conditions designed to characterize scalability. Up to250 simultaneous queries were tested and up to 10 million events across 7event components were involved in these queries. The system coordinatesthe staging of "bundles" of files from the HPSS tape system, so that allthe needed components of each event are in disk cache when accessed bythe application software. The caching policy algorithm for thecoordinated bundle staging is described in the paper. The initialprototype implementation interfaced to the Objectivity/DB. In this latestversion, it evolved to work with arbitrary files and use CORBA interfacesto the tag database and file catalog services. The interface to the tagdatabase and the MySQL-based file catalog services used by STAR aredescribed along with the planned usage scenarios.

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE Director, Office of Science. Division of NuclearPhysics
OSTI Identifier:
901026
Report Number(s):
LBNL-45551
R&D Project: NGC; TRN: US0702435
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Conference
Resource Relation:
Conference: Computing in High Energy and Nuclear Physics,Padova, Italy, February 7 - 11, 2000
Country of Publication:
United States
Language:
English
Subject:
99; ALGORITHMS; IMPLEMENTATION; NUCLEAR PHYSICS; PERFORMANCE; STARS; STORAGE; tag tape MySQL query analysis HPSS STAR RHIC CORBA

Citation Formats

Bernardo, L., Gibbard, B., Malon, D., Nordberg, H., Olson, D., Porter, R., Shoshani, A., Sim, A., Vaniachine, A., Wenaus, T., Wu, K., and Zimmerman, D. New capabilities in the HENP grand challenge storage access systemand its application at RHIC. United States: N. p., 2000. Web.
Bernardo, L., Gibbard, B., Malon, D., Nordberg, H., Olson, D., Porter, R., Shoshani, A., Sim, A., Vaniachine, A., Wenaus, T., Wu, K., & Zimmerman, D. New capabilities in the HENP grand challenge storage access systemand its application at RHIC. United States.
Bernardo, L., Gibbard, B., Malon, D., Nordberg, H., Olson, D., Porter, R., Shoshani, A., Sim, A., Vaniachine, A., Wenaus, T., Wu, K., and Zimmerman, D. Tue . "New capabilities in the HENP grand challenge storage access systemand its application at RHIC". United States. https://www.osti.gov/servlets/purl/901026.
@article{osti_901026,
title = {New capabilities in the HENP grand challenge storage access systemand its application at RHIC},
author = {Bernardo, L. and Gibbard, B. and Malon, D. and Nordberg, H. and Olson, D. and Porter, R. and Shoshani, A. and Sim, A. and Vaniachine, A. and Wenaus, T. and Wu, K. and Zimmerman, D.},
abstractNote = {The High Energy and Nuclear Physics Data Access GrandChallenge project has developed an optimizing storage access softwaresystem that was prototyped at RHIC. It is currently undergoingintegration with the STAR experiment in preparation for data taking thatstarts in mid-2000. The behavior and lessons learned in the RHIC MockData Challenge exercises are described as well as the observedperformance under conditions designed to characterize scalability. Up to250 simultaneous queries were tested and up to 10 million events across 7event components were involved in these queries. The system coordinatesthe staging of "bundles" of files from the HPSS tape system, so that allthe needed components of each event are in disk cache when accessed bythe application software. The caching policy algorithm for thecoordinated bundle staging is described in the paper. The initialprototype implementation interfaced to the Objectivity/DB. In this latestversion, it evolved to work with arbitrary files and use CORBA interfacesto the tag database and file catalog services. The interface to the tagdatabase and the MySQL-based file catalog services used by STAR aredescribed along with the planned usage scenarios.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {4}
}

Conference:
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