1. Sejong STATUS Chang Yeong CHOI CERN, ALICE LHC Computing Grid Tier-2 Workshop in Asia, 1 th December 2006

2. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 OUTLINE Sejong Farm Working with ALICE Network status Sejong Report in PDC06 Issues in PDC06 Plan during 2007 Summary

3. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Sejong FARM

4. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Sejong Farm (1) Since 2004 Tier 2 for ALICE One Front-End server for ALICE CE,SE. One storage server with 1.25 TB 32 CPUs as Worker Node Support ALICE jobs: 23 CPUs Support local jobs: 9 CPUs Network switches : 1Gbps : For Front-End server 100Mbps: For Worker Nodes

5. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 100Mbps switch Sejong Farm (2) Storage:1.25TB RAID 5 Front-End server CPU: intel 2.8Ghz Memory: 2GB Swap: 4GB Network: 1Gbps Services: PBS server, Ganglia (gmetad) NFS mount directory: /home 1Gbps switch NFS mount directory: /scratch wknode1 wknode32 CPU: intel 2.8Ghz Memory: 2GB Swap: 4GB Network: 100Mbps Services: PBS client, Ganglia (gmond) wknode1 wknode32 CPU: intel 2.8Ghz Memory: 2GB Swap: 4GB Network: 100Mbps Services: PBS client, Ganglia (gmond) AliEn

6. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Sejong WORKING WITH ALICE

7. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 VO-BOX for only ALICE All services on the same machine Cluster Monitor Computing Element (CE) : Batch system->PBS Storage Element (SE): Mass Storage System-> File Package Manager (PackMan) Monitoring system (MonaLisa) The File Transfer Daemon (FTD) WORKING WITH ALICE -

8. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Certificate request For ALICE VO [machine]:/home/aliprod> alien host-cert-request Country Name (2 letter code) [ ch ]: Organization Name (eg, company) [ AliEn ]: Organizational Unit Name (eg, section) []: ALICE Common Name (eg, YOUR name) []: alicece.sejong.ac.kr/SE WORKING WITH ALICE -

9. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Sejong info in LDAP WORKING WITH ALICE -

10. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 NETWORK STATUS

11. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Network connection Between CERN and Sejong (1) GLORIAD (GLObal RIng Network for Advanced Applications Development) with 10/40Gbps Optical lambda networking KREONet2 (Korea Research Environment Open NETwork) CERNKISTISEJONG GLORIAD 10Gbps KREONet2 1Gbs NETWORK STATUS -

12. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Network connection Between CERN and Sejong (2) KISTI, Korea (Daejeon) CNIC, China Hong Kong Beijing Russia (Novosibirsk) Amsterdam Moscow US Seattle CANARIE, Canada Chicago EU NYC 10G (KR-US) 10G (KR-HK) CalgaryToronto * TGN (Tyco Global Network ) : Korea to US * FNAL (FLAG North Asia Loop) : Korea to HK 2.5G 10G HKLight CSTNET Korea OC192 KR GLIF Exchange Point Hong Kong, CN 2*10GE KREONET Seattle, US GLIF node (CANARIE, PW) KR/ CANARIE nodes (L1, L2) PacificWave OC192 10GE OC192 Korea StarLight Sejong 1Gbps cern Picture from KISTI NETWORK STATUS -

13. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 SCP TEST with KT network Before 2006.6 100KB/s IPERF and SCP TEST with KISTI network since 2006.6: The network bandwidth was 1Gbps between KISTI and Sejong, but local network switches were 10/100Mbps 6MB/s 2.5MB/s Scp : Outgoing bandwidth With 1 Gbps switch Network bandwidth between CERN and Sejong NETWORK STATUS -

14. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Sejong REPORT IN PDC06 Sejong

15. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Productions in PDC06 Running service : VO-BOX Production started in July 2006 Max jobs: 23 Produced 1.8GB of data (raw.root: 800MB, root_archive.zip: 60MB) The raw.root and the root_archive.zip were sent to CERN by xrootd Other data removed from the work directory. Sejong REPORT IN PDC06 -

16. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Resources statistics of ALICE Resources contribution (normalized Si2K units): 50% from T1s, 50% from T2s The role of the T2 remains very high! Sejong REPORT IN PDC06 -

17. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Report on Sejong activity Sejong support only ALICE Sejong REPORT IN PDC06 -

18. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 VO Box and AliEn services status of Sejong with MonaLisa Sejong REPORT IN PDC06 -

19. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Done jobs Sejong REPORT IN PDC06 -

20. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Outgoing Traffic Sejong REPORT IN PDC06 -

21. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Network speed for one job Network speed was 76.8KB/s for one job We hoped the speed was 100KB/s at least That is why we put 23 for max jobs: Network bandwidth is 2.5MB/s on average Sejong REPORT IN PDC06 -

22. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Sejong(CE) status with Ganglia During 6 months With KISTI network Sejong REPORT IN PDC06 -

23. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Sejong (worker nodes) status with Ganglia Jobs status on PBS Sejong REPORT IN PDC06 -

24. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 ISSUES IN PDC06 Most serious problem was related to network

25. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 PackMan issue PackMan could not get packages from AliEn because it timed out. Solution: SOAP.pm : row 418 print"Putting A Longer Timeout \n"; $self->{$service} = SOAP::Lite->uri($serviceName)-> proxy($host,timeout=>400)->on_fault($my_faultSub); ISSUES IN PDC06 -

26. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Depend on Network: Compare with Kolkatta (1) 7 jobs for saving For one job: Kolkatta = 0.28MB/s Sejong = 0.077MB/s About 3.6 times difference ISSUES IN PDC06 -

27. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Depend on Network: Compare with Kolkatta (2) Running and Saving job During one day ISSUES IN PDC06 -

28. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Done jobs during one day 2350 Depend on Network: Compare with Kolkatta (3) ISSUES IN PDC06 -

29. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Depend on Network: Compare with Kolkatta (4) ISSUES IN PDC06 -

30. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Plan during 2007 We are trying to organize ALICE Tier 2 center in collaboration with KISTI situated at KISTI The scale will be CPU (kSI2K)300 or 100 DISK (TBytes)50 or 30 10G SWITCH1 File Server2

31. Chang Yeong CHOI(CERN, ALICE) LHC Computing Grid Tier-2 Workshop in Asia, 1th December 2006 Summary The Sejong network bandwidth has an increase of about 2.5MB/s on the average with KISTI network since 2006.6 Now the Sejong site gets 23 jobs from the AliEn on the grid : one job produce 1.8 GB of data. The raw.root (800MB) and the root_archive.zip (60MB) which are one of the produced data from only one finished job move to CERN storages (Castor) with about 76KB/s network bandwidth. Although every network system is 1Gbps, the network bandwidth between CERN and Sejong is still about 2.5MB/s on the average. A stable and high performance network is very important to work on the Grid.