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Klaster obliczeniowy WLCG – cz.I

Klaster obliczeniowy WLCG – cz.I. Alice::WTU::LCG - skład: VOBOX  alicluster.if.pw.edu.pl VM: saturn.if.pw.edu.pl CREAM-CE  aligrid.if.pw.edu.pl VM: saturn.if.pw.edu.pl SE  alix.if.pw.edu.pl ca 12 TB disk RAID6 DBII  bdii.if.pw.edu.pl VM: saturn.if.pw.edu.pl

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Klaster obliczeniowy WLCG – cz.I

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  1. Klaster obliczeniowy WLCG – cz.I Alice::WTU::LCG - skład: VOBOX  alicluster.if.pw.edu.pl VM: saturn.if.pw.edu.pl CREAM-CE  aligrid.if.pw.edu.pl VM: saturn.if.pw.edu.pl SE  alix.if.pw.edu.pl ca 12 TB disk RAID6 DBII  bdii.if.pw.edu.pl VM: saturn.if.pw.edu.pl TORQUE  torque.if.pw.edu.pl VM: saturn.if.pw.edu.pl 16x WN  node10[57-72].grid4cern.if.pw.edu.pl IntelQ6600 8GBRAM 13x WN  node10[81-99].grid4cern.if.pw.edu.pl AMD-Athlon 2C 4GBRAM NFS,WEB,NTP,NAT server  neo1.if.pw.edu.pl ca 2 TB disk RAID5 SLC5 – 64bit, gLite 3.2 (ca 10.000 rpms SLC+ 1.000 gLite) 3x APC UPS, 3x GB-eth switch saturn.if.pw.edu.pl - HP DL385 4x Opteron 2.4GHz 4GB RAM + VMWare Infrastructure3

  2. LCG Information System Levels • Resource level: Grid Resource Information Server (GRIS) • One GRIS on top of each CE, SE, RB, MyProxy (no WNs). • Sensors and scripts get status of concrete resources statically (e.g. GlueCEUniqueID) or dynamically (e.g. GlueCEStateWaitingJobs) • Site level: Grid Index Information Server (GIIS) • Compiles all the information of the different GRISs in a site. • LCG-2 recommends using a BDII instead of a GIIS • Improves robustness and stability. • Called the site BDII. • Top level: Berkeley DB Information Index (BDII) • Keeps all Grid information about the VOs (generally only one). • Stores information from local BDIIs or GIISs in its database. • Only queries sites that are included in a configuration file.

  3. Each site can run a BDII. It collects the information coming from the BDIIs/GIISs At each site, a site GIIS collects the information given by the GRISs Local GRISs run on CE, SE, RB, MyProxy at each site and report dynamic and static information LCG Information System Hierarchy Abbreviations: BDII: Berkeley DataBase Information Index GIIS: Grid Index Information Server GRIS: Grid Resource Information Server From LCG2.3.0 site GIIS has been replaced by “site” BDII

  4. CE Local GRIS Site 3 Site 1 BDII-C BDII-B Site 2 CE Local GRIS SE Local GRIS RB Local GRIS BDII-A SE Local GRIS SE Local GRIS SE Local GRIS Site BDII Site BDII Site BDII LCG Information System Hierarchy

  5. Old AliEn Framework User 100% perl5 Central services SOAP Local Site elements

  6. user Resource Broker Resource Broker server server user job list AliEn ‘Pull’ Protocol • One of the major differences between ALiEn and LCG grids is that AliEn uses the ‘pull’ rather than ‘push’ protcol. • EDG/Globus model: • ALiEn model:

  7. Resource Broker “Pull” instead of traditional “Push” architecture Authen Broker TransferBroker EDG/Globus TransferOptimiser IS Logger

  8. http://www.if.pw.edu.pl/~alix/

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