International Workshop on HEP Data Grid

Aug 23, 2003, KNU

Status of Data Storage, Network, Clustering in SKKU CDF group

Intae Yu*, Joong Seok Chae

Department of Physics

SungKyunKwan University (SKKU)

Suwon, Korea

(On behalf of the HEP Data Grid Working Group)

CDF II (Collider Detector at Fermilab)

International Workshop

on HEP Data Grid

Aug 23, 2003, KNU

Proton-Antiproton Collider Experiment

Collision Rate : 2.5 MHz

Event Rate to Tape : ~300Hz

Average Data Size of an Event : ~100KB

Expected Size of Real Data per year :

109 Events * 100KB = 100 TB

Monte Carlo Data = Real Data * 3

PByte Data Storage and Data Processing

Computing Power is required

CDFII Central Analysis Farm (CAF)

CDF CAF/Korea DCAF

International Workshop

on HEP Data Grid

Aug 23, 2003, KNU

Korea DCAF ( Decentralized Analysis Farm) at KNU

A Linux Cluster with PBS Batch System at KNU: 23 CPU’s

Implementation of SAM Grid through DCAF and PBS cluster

Dr. Kihyeon Cho’s Talk

CDF CAF(Central Analysis Farm) at Feynman Center

306 Dual Nodes and 92 File Server (180 TB)

Develop DCAF at off-sites (UCSD, KNU,..)

SKKU CDF Group

International Workshop

on HEP Data Grid

Aug 23, 2003, KNU

SKKU CDF group’s activity

1 Faculty and 4 Graduate students

B Physics Analysis

Currently ~400 GB and ~10 CPU’s are used at SKKU and Fermilab

Computing Resources at SKKU

File Server : ~ 4 TB (2 TB + 2 TB(plan))

Linux Farm : ~10 Nodes (2 + 8 (plan))

Desktops : 7 Linux PC’s

Network : KOREN + KORNET

File Server

International Workshop

on HEP Data Grid

Aug 23, 2003, KNU

2 TB File Server

Optimization is in progress

12 Channel Raid (3WARE)

13* 180G 7200rpm HDD (IBM)

1Gbps to work nodes (planned)

Another 2TB File Server planned

Linux Farm

International Workshop

on HEP Data Grid

Aug 23, 2003, KNU

1 Batch Server + 1 Work node

7-9 Work nodes more in a month

CPU : 1 Pentium 4 2.8C

Hyper-Threading Technology

Functions like dual CPU

1G DDR RAM/120G 7200rpm HDD

1Gbps bandwidth

Plan to install PBS batch System

Move to FBSNG system (mini DCAF)

and SAM GRID

Construction Model

International Workshop

on HEP Data Grid

Aug 23, 2003, KNU

NFS

Submit job Return result

Batch job

Result

ResultNFS

User Linux

desktop

Batch

ServerWorking

nodes

File

Server

LINUX FARM CONSTRUCTION MODEL

Network

Network Connectivity

CHEP - SNU, CHEP - SKKU: ~ 40 Mbps

CHEP - CDF : ~20 Mbps

SKKU - CDF : < 2 Mbps : plan Direct Connection to KOREN

Fermilab/CDFCHEP/KNU

SNU

SKKU

KOREN

155Mbps APII

International Workshop

on HEP Data Grid

Aug 23, 2003, KNU

Grid Activity

International Workshop

on HEP Data Grid

Aug 23, 2003, KNU

Globus 2.2 is installed in a test machine

Configuration of CDF Analysis Software under Globus environment will be done between SKKU and KNU DCAF

In collaboration with SKKU Belle group, EUDG test bed will be constructed

Plan to implement SKKU mini DCAF with SAM GRID in Linux farm

Summary

International Workshop

on HEP Data Grid

Aug 23, 2003, KNU

SKKU CDF group’s work on Grid is in a very early stage

Construction of file server and linux farm is in progress

Plan 1 Gbps between SKKU machines

100 Mbps to KNU/SNU and 20 Mbps to Fermilab/CDF

1st : Configuration of CDF software in Globus 2.2

2nd : Build EUDG testbed at SKKU

3rd : Construct mini DCAF through SAM GRID at SKKU