Speaker
N. Katayama
(KEK)
Description
The Belle experiment has accumulated an integrated luminosity of more
than 240fb-1 so far, and a daily logged luminosity now exceeds 800pb-
1. These numbers correspond to more than 1PB of raw and processed
data stored on tape and an accumulation of the raw data at the rate
of 1TB/day. To meet these storage demands, a new cost effective,
compact hierarchical mass storage system has been constructed. The
system consists of commodity RAID systems using IDE disks and Linux
PC servers as the front-end and a tape library system using the new
high density SONY S-AIT tape as the back-end.The SONY Peta Serv
software manages migration and restoration of the files between tapes
and disks. The capacity of the tape library is, at the moment, 500 TB
in three 19 inch racks and the RAID system, 64 TB in two 19 inch
racks. An extension of the system to 1.2 PB tape library in eight
racks with 150 TB RAID in four racks is planned. In this talk,
experiences with the new system will be discussed and the performance
of the system when used for data processing and physics analysis of
the Belle experiment will be demonstrated.
Primary authors
J. Hikita
(SONY Co.)
K. Goto
(SONY Co.)
K. Tamura
(SONY Co.)
M. Makino
(Systemworks Co.)
M. Yokoyama
(HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION)
N. Katayama
(KEK)
T. Hibino
(HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION)
