riken ccj project regional computing center in japan for bnl-rhic experiment especially for phenix...
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RIKEN CCJ Project• Regional computing center in Japan for BNL-RHIC experiment especially for PHENIX collaboration.• CCJ serves for RHIC physics activity in Japanese and Asian scientists.• Analysis of large scale data and simulation.
Physical Review Letters 88, 022301 (2002)
Plotted as a function of transverse momentum (pT) is the ratio, RAA, of the measured yield of charged and neutral pions in Au-Au collisions to the yield that would be expected based on an extrapolation of proton-proton collisions. The PHENIX results and measurements taken at lower energies at the CERN SPS are qualitatively different. At RHIC higher pT seems to be depleted, which was predicted assuming an energy loss of partons in dense matter.
PHENIX Experiment
Relativistic Heavy Ion ColliderBrookhaven National Lab.
A.Kiyomichi, T. Ichihara, Y. Watanabe, S. Yokkaichi, O. Jinnouchi, H. En’yo and Y.Goto (RIKEN, RBRC)
Data transfer between RIKEN and BNL• Send by air: ~20MB/s (=200GB*60tapes/week)
• Use media tape (1tape=200GB, 1Case=60tape)• Network : ~10MB/s
• For quick analysis
NETWORK
TAPE MEDIA
PHENIX Experiment http://www.phenix.bnl.gov/• Collisions of polarized protons and heavy ions are delivered at
BNL-RHIC.• Understand the spin structure of the proton through polarized p
roton collisions.• Search for quark gluon plasma, a state that existed at an early
stage after Big Bang.Amount of DATA ~200TB/year
RIKEN-CCJ http://ccjsun.riken.go.jp/ccj/ CPU performance : 508 Pentium III/4 CPU (Total: 1,111 GHz)
252 (0.7~2.0GHz, CCJ) +256 (3.0GHz, RSCC) CPUs• Use CPU resource of RIKEN Super Combined Cluster System (RSCC)
Disk Storage : 38 TB Tape Storage: ~600 TB ( = 3,000 tapes, expandable to 1.2 PB)
HPSS (High Performance Storage System)
Linux PC Cluster(RIKEN-CCJ)
The Cover of Physical Review Letters
PHENIX event display Au+Au s = 200GeV
Tape Storage
Measurement of the double helicity asymmetry in inclusive mid-rapidity neutral pion production for polarized proton-proton collisions. This is the first of a program to study the longitudinal spin structure of the proton, using strongly interacting probes, at collider energies. In perturbative QCD, ALL is directly sensitive to the polarized gluon distribution function in the proton through gluon-gluon and gluon-quark sub-processes. The observed asymmetry is small and consistent with a small gluon polarization.
Long Island, NY
RIKEN-CCJWako,Japan
In this schematic illustration two gold nuclei collide and give rise to thousands of quarks and gluons, which then equilibrate into a hot cauldron of matter, the quark-gluon plasma. As this plasma cools, it condenses into the ordinary particles seen by the detectors.
Study of the Quark-Gluon Plasmawith heavy-ion collisions
PHYSICS RESULTS
Study of the Proton Spin Structurewith polarized-proton collisions
In this schematic illustration two polarized protons collide and obtain important data to understand the spin of the proton.
STKTapeRobot
HPSSTape Mover
Tape Mover
Disk Mover
HPSS Server
Disk Mover
288 GB
LVD RAID
100BaseT x n
RIKENsupercomputer
6 x 9940Bdrives
Info. Blldg. 1F
Main Bldg.2F
CPU Farms (332 CPU)total 374 GHz
1200 TB
1000BaseSX
1000BaseSX
ACSLS
GigabitSwitch
1000BaseSX x 5 (9kB MTU)
IBM e-server (AIX 5.1)
HPSS
Privateaddress
GigabitSwitch
Gigabit SwitchCatalyst 2948G
Alta cluster) * 14 box
Switch
HPSSController
1000BaseSX
3TB
RAID
AFS01AFS server
Altaclustercontrol WS
3.2 TBLVD RAID
8 TB RaidHPSS Cache
ÇP00
ÇP00ÇP00GB
SUN E450Data Server
5.7 TBFC RAID
6.0 TBFC RAID
6.0 TBFC RAID
ÇP00
ÇP00ÇP00GB
SUN E450
Data Server
ÇP00
ÇP00ÇP00GB
SUN E450
Data Server
ÇP00
ÇP00ÇP00GB
SUN E450
Data Server
ÇP00
ÇP00ÇP00GB
SUN E450
Data Server
Pentium III
Pentium III
Pentium III
Pentium IIIRedhat 6.ÇPLinux
RedhatRedhat 6.ÇP 6.ÇPLinuxLinux
Pentium III
Pentium III
Pentium III
Pentium IIIRedhat 6.ÇPLinux
RedhatRedhat 6.ÇP 6.ÇPLinuxLinux
Pentium III
Pentium III
Pentium III
Pentium IIIRedhat 6.ÇPLinux
RedhatRedhat 6.ÇP 6.ÇPLinuxLinux
Pentium III
Pentium III
Pentium III
Pentium IIIRedhat 6.ÇPLinux
RedhatRedhat 6.ÇP 6.ÇPLinuxLinux
Pentium III
Pentium III
Pentium III
Pentium IIIRedhat 6.ÇPLinux
RedhatRedhat 6.ÇP 6.ÇPLinuxLinux
33.2 TB RAID
Pentium III
Pentium III
Pentium III
Pentium IIIRedhat 8Linux
RedhatRedhat 8 8LinuxLinux
STKTapeRobot
HPSS
SUNACSLS
432
432432GB
SUN Fire880Data Server
12.0 TBFC RAID
001CCJAMS 001001DB server
Xeon
Xeon
Xeon
Xeon
RedhatRedhat 8 8LinuxLinux
Xeon
Xeon
Xeon
XeonRedhat 8Linux
RedhatRedhat 8 8LinuxLinux
Xeon
Xeon
Xeon
XeonRedhat 8Linux
RedhatRedhat 8 8LinuxLinux
Xeon
Xeon
Xeon
XeonRedhat 8Linux
RedhatRedhat 8 8LinuxLinux
Xeon
Xeon
Xeon
XeonRedhat 8Linux
RedhatRedhat 8 8LinuxLinux
Xeon
Xeon
Xeon
XeonRedhat 8Linux
RedhatRedhat 8 8LinuxLinux
Xeon
Xeon
Xeon
XeonRedhat 8Linux
RedhatRedhat 8 8LinuxLinux
Xeon
Xeon
Xeon
XeonRedhat 8Linux
RedhatRedhat 8 8LinuxLinux
GigabitSwitch
GigabitSwitch
Xeon 3GHz, 256 CPU total 768 GHz
Firewall
RIKEN LANWAN
(New super computer)
Linux PC Cluster (RIKEN-RSCC)
Disk Storage
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PHENIX Computing Center in Japan [CCJ]