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KEK preprint 97-20
Large-Scale File Service based on DCE/DFS in HEP
CHEP97, Berlin
April 9, 1997
S. Yashiro,
T. Sasaki,
Y. Morita,
T. Ishikawa,
H. Mawatari, Y. Watase
KEK, High Energy Accelerator Research Organization
1-1 Oho, Tsukuba, Ibaraki 305 Japan
N. Takashimizu
Niigata University,
8050 Ikarashi Ninocho, Niigata, Niigata 950 Japan
T. Itoh
Software Development Centre, Hitachi Ltd.
TYG 11th Bldg., 3-16-1, Nakamachi, Atsugi, Kanagawa 243, Japan
Y. Kodama, Y. Munakata, S. Kohno, H. Itoh
Government Public Corporation Information
Systems Division, Hitachi Ltd.
Tsukuba Mitsui bldg.,1-6-1, Takezono, Tsukuba, Ibaraki 305, Japan
abstract
The distributed computing system at KEK was built with DCE/DFS and HSM.
The central computer system at KEK was designed and installed
with the DCE to manage 10 distributed computer clusters for
research groups. The files in the system are accessed through
the DCE/DFS server-client mechanism, which provides a caching
function for remote files. The HSM software was also implemented
to facilitate seamless access to the files in the disk as well
as in the tapes. For integrating HSM with DCE/DFS and improving
the file-transfer speed, we changed the access sequence in the
DCE/DFS and created a new policy of recycling the cache so as to
avoid unwanted cache flushing for small-sized files by
simultaneous caching of a large-sized one.
Keywords
DCE, DFS, HSM
S. Yashiro, T. Sasaki, Y. Morita, T. Ishikawa, H. Mawatari, Y. Watase
N. Takashimizu, T. Itoh, Y. Kodama, Y. Munakata, S. Kohno, H. Itoh
Tue May 20 12:18:02 JST 1997