Speaker
Prof.
Nobuhiko Katayama
(High Energy Accelerator Research Organization)
Description
The Belle experiment operates at the KEKB accelerator, a high luminosity
asymmetric energy e+ e- collider. The Belle collaboration studies CP violation in
decays of B meson to answer one of the fundamental questions of Nature, the
matter-anti-matter asymmetry. Currently, Belle accumulates more than one
million B Bbar meson pairs that correspond to about 1.2 TB of raw data in one
day. The amount of raw data is expected to increase by 50 times after an
upgrade of the KEKB accelerator.
The challenge is how to realize required high performance data access and
scalable data computing. Our solution is the Gfarm file system. It is a
commodity-based Grid-wide network shared file system that federates local
storage of cluster nodes; moreover it provides scalable I/O performance with
distributed data access. We constructed a Gfarm file system with 26 TB capacity
and 52 GB/sec I/O bandwidth, integrating local disks of 1112 compute nodes in
the KEKB computing facility, and measured scalability of disk I/O performance
up to more than 1000 nodes. We also performed a real Belle data analysis
program using more than 700 nodes at the speed of 24GB/s, reducing the Belle
data analysis time by a factor of about 1,000.
| Submitted on behalf of Collaboration (ex, BaBar, ATLAS) | Belle |
|---|
Primary authors
Dr
Ichiro Adachi
(HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION)
Prof.
Nobuhiko Katayama
(High Energy Accelerator Research Organization)
Prof.
Osamu Tatebe
(Tsukuba University)
Dr
Shohei Nishida
(HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION)
