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KEK preprint 97-63
Use of SONY PetaSite and
DTF Helical Scan Tape Drive
on KEK Central Computer UNIX Cluster
CHEP97, Berlin
April 7-11, 1997
Y. Morita,
S. Yashiro, J. Chiba, Y. Watase
KEK, High Energy Accelerator Research Organization
1-1 Oho, Tsukuba, Ibaraki 305 Japan
Y. Kodama, S. Kohno, N. Tanaka
Government & Public Corporation
Information Systems Division,
HITACHI, Ltd., Computer Group,
Tsukuba Mitsui bldg. 1-6-1,
Takezono, Tsukuba, Ibaraki 305 Japan
abstract
Storing a few tens to a few hundreds of tera bytes of HEP
data under distributed UNIX environment is an essential and
non-trivial function for HEP computing centers. Performance
issues, such as data I/O throughput and data path parallelism
for multi-user environment, become critical. We have developed a UNIX
tape management system which provides two functions on a single
tape library: (1) HSM migration, and (2) a direct tape access
method with a file index database. Twenty SONY
DTF helical scan tape drives are connected to several UNIX workstation
servers at sustained I/O throughput speed of 12 MB/sec.
The library has total storage capacity of 20 TB.
The system is being used for several KEK Proton
Synchrotron fixed target experiments since January 1996.
keyword
HSM; DTF; Tape Library
Y. Morita, S. Yashiro, J. Chiba, Y. Watase
Y. Kodama, S. Kohno, N. Tanaka
Tue Jul 1 14:13:49 JST 1997