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CC-J : Computing Center in Japan for RHIC Physics. Takashi Ichihara (RIKEN and RIKEN BNL Research Center ) Presented on 28/09/2000 at RBRC Review at BNL. Contents. 1. Overview 2. Concept of the system 3. System requirement 4. Other requirement as a regional center

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Cc j computing center in japan for rhic physics l.jpg

CC-J : Computing Center in Japanfor RHIC Physics

Takashi Ichihara

(RIKEN and RIKEN BNL Research Center)

Presented on 28/09/2000 at RBRC Review at BNL


Contents l.jpg
Contents

1. Overview

2. Concept of the system

3. System requirement

4. Other requirement as a regional center

5. Project plan and current status

6. Activity since last review

7. Plan in this year

8. Current Configuration of the CC-J

9. Components of the CC-J (photo)

10. CC-J Operation

11. Summary


Phenix cc j overview l.jpg
PHENIX CC-J : Overview

  • PHENIX Regional Computing Center in Japan (CC-J) at RIKEN wako

  • Scope

    • Principal site of computing for PHENIX simulation

      • PHENIX CC-J is aiming at coveringmost of the simulation tasks of the whole PHENIX experiments

    • Regional Asian computing center

    • Center for the analysis of RHIC spin physics

  • Architecture

    • Essentially follow the architecture of RHIC Computing Facility (RCF) at BNL

  • Construction

    • R&D for the CC-J started in April ‘98 at RBRC

    • Construction began in April ‘99 over athree years period

    • 1/3 scale of of the CC-J started operation in June 2000



  • System requirement for the cc j l.jpg

    Annual Data amount

    DST 150 TB

    micro-DST 45 TB

    Simulated Data 30 TB

    Total225 TB

    Hierarchical Storage System

    Handle data amount of 225TB/year

    Total I/O bandwidth: 112 MB/s

    HPSS system

    Disk storage system

    15 TB capacity

    All RAID system

    I/O bandwidth: 520 MB/s

    System Requirement for the CC-J

    • CPU ( SPECint95)

      • Simulation 8200

      • Sim. Reconst 1300

      • Sim. ana. 170

      • Theor. Mode 800

      • Data Analysis 1000

      • Total 11470 SPECint95

      • ( = 120K SPECint2000)

    • Data Duplication Facility

      • Export/import DST, simulated data.


    Other requirements as a regional computing center l.jpg
    Other Requirements as a Regional Computing Center

    • Software Environment

      • Software environment of the CC-J should be compatible to the PHENIX Offline Software environment at the RHIC Computing Facility (RCF) at BNL

        • AFS accessibility (/afs/rhic)

        • Objectivity/DB accessibility

    • Data Accessibility

      • Need exchange data of 225 TB/year to RCF

        • Most part of the data exchange will be done by SD3 tapecartridges (50GB/volume)

        • Some part of the data exchange will be done over theWAN

          • CC-J will use Asia-Pacific Advanced Network (APAN) for US-Japan connection

            • http://www.apan.net/

          • APAN has currently 70 Mbps bandwidth for Japan-US connection

          • Expecting 10-30% of the APAN bandwidth (7-21 M bps) can be used for this project:

            • 75-230 GB/day ( 27 - 82 TB/year) will be transferred over the WAN



    Activity since the last review in these 15 months l.jpg
    Activity since the last review (in these 15 months)

    • Construction of the CC-J at phase 1,2

      • Phase 1 and 1/3 of Phsae 2 hardware installed

        • High Performance Storage System (HPSS) with 100 TB Tape library

        • CPU farm of 128 processors (about 4000 SPECint95)

        • 3.5 TB Raid Disk , Two Gigabit Ethernet Switches, etc.

        • A tape drive and a workstation installed at BNL RCF for tape duplication

      • Software environment for PHENIX computing : established

        • AFS local mirroring, Linux software environment, LSF etc : ready to use

    • CC-J operation

      • CC-J started operation in June 2000.

        • 40 user’s accounts created so far.

      • 100 K event simulation (130 GeV/nucleon, Au+Au min. bias) of

        • (1)retracted geometry, zero filed, (2) standard geometry, zero filed,

        • (3)full 2D field field, (3) full 3D field,(3) half 3D filed : in progress

      • Real raw data (2TB) of PHENIX experiment transferred to CC-J via WAN

        • Large ftp performance (641 KB/s = 5 Mbps) was obtained (RTT = 170 ms)

        • data analysis by regional users are in progress.


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    Plan in this year

    • Hardware upgrade

      • 6 TB Raid disk, tape drives and cached disks for HPSS

      • 64 Linux CPU farms, SUN servers for data mining & NFS serving

    • System development

      • Data duplicating facility (to be operational)

      • Objectivity/DB accessing method (to be established)

    • Simulation production

      • 100k Au+Au simulations (continuing)

      • Other simulations to be proposed by PHENIX PWG (spin etc.)

    • Data Analysis

      • Official Data Summary Tape (DST) will be produced at RCF soon

      • DST : transfer to the CC-J via the duplication facility (by tape)

      • Micro-DST production (data mining ) for data analysis




    Cc j operation l.jpg
    CC-J Operation

    • Operation, maintenance and development of CC-J are carried out under the charge of the CC-J Planning and Coordinate Office (PCO).


    Summary l.jpg
    Summary

    • The construction of the PHENIX Computing Center in Japan (CC-J) at RIKEN Wako campus, which will extend over a three years period, began in April 1999.

    • The CC-J is intended as the principal site of computing for PHENIX simulation, a regional PHENIX Asian computing center, and a center for the analysis of RHIC spin Physics.

    • The CC-J will handle the data of about 220 TB/year and the total CPU performance is planned to be 10k SPECint95 (100k SPECint2000) in 2002.

    • CPU farm of 128 processors (RH6.1, kernel 2.2.14/16 with nfsv3 ) is stable.

    • Copy data over WAN: Large ftp performance (641 KB/s = 5 Mbps) was obtained for over the Pacific Ocean (RTT = 170 ms)

    • The CC-J operation started in June 2000 at 1/3 scale.

      • 39 user’s account created.

    • 100K-event simulation project started in September 2000.

    • Some part of real raw data (about 2 TB) of PHENIX experiment transferred to CC-J via WAN and data analysis by regional users are in progress.