International Workshop on HEP Data Grid Nov 9, 2002, KNU

Data Storage, Network, Handling, and Clustering in CDF Korea group

Intae Yu*, Junghyun Kim, Ilsung ChoSungkyunkwan University (SKKU)

Kihyeon Cho, Youngdo OhCenter for High Energy Physics (CHEP)

Kyungpook National University (KNU)

Bockjoo KimSeoul National University (SNU)

Jysoo LeeKISTI, Supercomputing Center

CDF (Collider Detector at Fermilab)

Proton (1TeV) – Antiproton (1TeV) Collider Experiment (~600 members)

Collision Event Rate : 2.5 MHz

Collision Runs : 2001-2005 (Run IIa) 2005-2008 (Run IIb)

International Workshop

on HEP Data Grid

Nov 9, 2002, KNU

CDF Run IIa

Data Characteristics

Event Rate to Tape : 300 Hz

Raw (Compressed) Data Size : 250 (~100) KB/event

Number of Events : ~ events/year

Requirements for Data Analysis

700 TB of Disk and 5 THz of CPU assuming 200 simultaneous users

Upgraded CAF (Central Analysis Facility) may not have enough CPUs

and disk storage to handle CDF data

710

International Workshop

on HEP Data Grid

Nov 9, 2002, KNU

CDF Grid

In Run IIb, expect 6~7 times more data (~3 PB/ year)

CDF needs distributed disk storage and computing systems among collaborators via fast network HEP DataGRID

CDF GRID working group was formed in March, 2002

Research on SAM (Sequential data Access via Metadata) with D0 group

CDF Korea Group

DCAF (DeCentralized Analysis Farm) in Korea : KCAF (Dr. Cho’s Talk)

CHEP/KNU : KCAF (Tier 1)

SNU, SKKU (Tier 2)International Workshop

on HEP Data Grid

Nov 9, 2002, KNU

Network

Network Test

CHEP - SNU, CHEP - SKKU: ~ 40 Mbps

CHEP - CDF : ~20 Mbps

Enough Bandwidth for Grid Research and Test

Fermilab/CDFCHEP/KNU

SNU

SKKU

KOREN

155Mbps

APII

45Mbps

International Workshop

on HEP Data Grid

Nov 9, 2002, KNU

Status (KCAF)

KCAF Construction

6 work nodes (12 CPU) for initial tests

more work nodes by the end of this year

1 TB disk storage

1 +(4) TB Disk for the network buffer between CHEP and CDF

KCAF Software

Linux based CDF software installed and tested

PBS installed and working successfully

Main project : CDF Monte Carlo data production International Workshop

on HEP Data Grid

Nov 9, 2002, KNU

Status

In SKKU, a disk storage server (~0.5 TB) is constructed

Second disk storage server (~ 2TB) by the end of this month

CHEP/KNU SKKUWork Nodes

Disk Storage Server

KOREN

~ 40 Mbps

International Workshop

on HEP Data Grid

Nov 9, 2002, KNU

Status

Job submission from SKKU to CHEP work nodes / Output data transfer from CHEP to the SKKU data storage server is planned using NFS or Globus SE

Grid Software and Middleware

Globus 2.0 : 10 nodes (CHEP), 1 node (SNU), 1 node (Fermilab)

Construct Private CA

GridFTP, Replica Catalog, Replica Management installed

Test Grid testbed : CHEP - SNU

International Workshop

on HEP Data Grid

Nov 9, 2002, KNU

Prospects

KCAF at CHEP (Tier 1)

~ 10% of CDF Run II data processing and storage

(~500 TB and ~200 nodes)

(both real and MC data)

SNU/SKKU (Tier 2)

Disk Storage System (~ 50 TB)

Local Clusters (mini-KCAF) (~60 nodes)

Network

CHEP-Fermilab : ~ 70 Mbps for Run IIb required

CHEP-SNU/SKKU: ~ 40 Mbps

Implementation of CDF data processing in full Grid environmentInternational Workshop

on HEP Data Grid

Nov 9, 2002, KNU