The CDF Run II disk inventory manager

Conference · Fri Nov 02 04:00:00 EST 2001

OSTI ID:788246

and Stephan Lammel, Paul Hubbard ^[1]

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1. Fermilab

The Collider Detector at Fermilab (CDF) experiment records and analyses proton-antiproton interactions at a center-of-mass energy of 2 TeV. Run II of the Fermilab Tevatron started in April of this year. The duration of the run is expected to be over two years. One of the main data handling strategies of CDF for Run II is to hide all tape access from the user and to facilitate sharing of data and thus disk space. A disk inventory manager was designed and developed over the past years to keep track of the data on disk, to coordinate user access to the data, and to stage data back from tape to disk as needed. The CDF Run II disk inventory manager consists of a server process, a user and administrator command line interfaces, and a library with the routines of the client API. Data are managed in filesets which are groups of one or more files. The system keeps track of user access to the filesets and attempts to keep frequently accessed data on disk. Data that are not on disk are automatically staged back from tape as needed. For CDF the main staging method is based on the mt-tools package as tapes are written according to the ANSI standard.

• Research Organization: Fermi National Accelerator Lab., Batavia, IL (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 788246
• Report Number(s): FERMILAB-Conf-01/301-E
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
99 GENERAL AND MISCELLANEOUS
COMPUTER ARCHITECTURE
DATA ANALYSIS
DATA BASE MANAGEMENT
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
MEMORY MANAGEMENT
PROTON-ANTIPROTON INTERACTIONS