1. EGEE-II INFSO-RI-031688 Enabling Grids for E-sciencE www.eu-egee.org EGEE Site Architecture Resource Center Deployment Considerations MIMOS EGEE Tutorial

2. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 2 Basic Site Architecture User Interface (UI) –User login environment –gLite clients MON –R-GMA Server for accounting SE (Disk Pool Manager) –Storage resource services Computing Element (CE) –Gateway to computing resources –Small sites will also install:  Site-BDII  Batch system manager  NFS file system for VO software Worker Node (WN) –Job execution machine –gLite clients used by jobs

3. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 3 Central Services BDII –Top level information system service –Available regionally Resource Broker –RB or new WMS –Job management –Only RB available regionally  (Dec 2007) VO Services –One service for each VO –LCG File Catalogue  Maps VO’s logical file names to physical file names –VO Management Service  Manages list of VO members

4. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 4 Information System Top Level BDII on BDII Site BDII running on CE GRIS on services –RB/WMS –LFC –SE –CE

5. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 5 Additional Services R-GMA –Central Registry and Schema server MyProxy –Dedicated node for better security File Transfer Service –Designed to manage reliable file transfer –Create “channels” to with associated transfer parameters to optimize and tune transfers  Concurrent files and number of parallel streams AMGA

6. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 6 Network Considerations Grid Services –Public IP Required by each Grid service –Forward and reverse DNS configuration Worker Node –Public IP for parallel stream file transfer –Private IP is possible  Single stream transfer for WNs to SE  Possible bottleneck via NAT/Firewall device Storage Elements –Bandwidth to and from Worker Nodes –Bandwidth to WAN Network Firewall requirements –https://twiki.cern.ch/twiki/bin/view/LCG/LCGPortTablehttps://twiki.cern.ch/twiki/bin/view/LCG/LCGPortTable

7. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 7 Hardware Requirements Minimum: only for very small sites Resource Broker –At least 20 GB Disk Worker Node –Depends on applications –X GB scratch space for each job –X MB Memory per job Large sites: +100 WNs –SMP or multi-core servers for CE and BDII –Install Site-BDII, Batch server and NFS server on dedicated node SpecMinimumRecommend CPUP3 500MhzP4 2Ghz RAM256 MB1GB Disk10 GB30 GB Network100 Mbps1 Gbps

8. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 8 OS and Middleware Installation gLite is certified on Scientific Linux CERN –But should work on RHEL binary compatible distributions  Include SLC yum/apt repository  Mirror SLC and gLite repository for faster Installation Currently porting from SLC3/i386 to SLC4/i386 –SL3/gLite 3.0: MON, DPM, LFC, VOMS, WMS, RB –SL4/gLite 3.1: BDII, lcgCE, WN, UI X86_64 is the next port being worked on

9. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 9 Additional Servers Requirements Installation of Java SDK –Installed separately due to licensing restrictions –RPMs packages required to resolve dependencies of Middleware –Java SDK 1.4.2 for glite 3.0 –Java SDK 1.5 for glite 3.1 Synchronize server time –Configure Network Time Protocol (NTP) for every server –Required by GSI security –Configure time zone and hardware clock to UTC  Troubleshooting and comparing log files across time zones Host certificates are required on all services –Except for UI, WN and BDII –Mutual authentication by clients

10. Enabling Grids for E-sciencE EGEE-II INFSO-RI-031688 10 Thanks for you attention Questions