riken ccj project regional computing center in japan for bnl-rhic experiment especially for phenix...

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]