1. Rod Walker IC 13th March 2002 SAM-Grid Middleware http://d0db.fnal.gov/sam  SAM.  JIM.  RunJob.  Conclusions. - Rod Walker,ICL.

2. Rod Walker IC 13th March 2002

3. SAM stands for “Sequential Access to Data via Metadata”. Sequential access within files – order of files isn’t important, e.g. HEP data. History of SAM Project started in 1997 by FNAL Computing Division(not just physicists). Meant for FNAL experiments, and recently taken up by CDF. So far ~20 FTE years – a lot of effort. State of the art in Data Management No-one else has tried to deliver TB’s of user selected data on demand.

4. Rod Walker IC 13th March 2002 Global file routing Many remote stations want files –SAM allowed free-for-all to gridftp server. –MSS access only from FNAL site, cache on private network,... Needed control and routing Solution: All sites can route files, eg. –Get fnal files from fnal-router –route=fnal.gov::nijmegen and nijmegen station has route=fnal.gov::fnal-router Janet - Geant – Esnet – FNAL, 155Mbit bottleneck. Janet - Geant – Surfnet – FNAL, Gbit(?)

5. Rod Walker IC 13th March 2002 SAM Status Middleware Development Global routing. Diverse deployments, e.g. private network, firewall, shared vs local disk cache. CDF deployment – GridPP Bug fixes. GridFTP and Authentication – GridPP Outlook Decreasing development. FNAL CD support for RunII

6. Rod Walker IC 13th March 2002

7. JIM history Purpose: to build on SAM’s data handling, to create a real grid. Job definition & management Information & Monitoring Novel concepts Already have DH system. ups/upd packaging and deployment. rpm functionality plus multi-platform, tailoring. little dependence on native installation, e.g.python v2.1f hugely simplified deployment. Use Condor as resource broker.

8. Rod Walker IC 13th March 2002 JIM components User Interface Job Definition language based on classadds RB reduced to making MMS ranking function Static & dynamic constraints:os,code version,freecpu,… Plus external function to query DH system. Collaboration with Wisconsin. Choose gatekeeper, use external function, separate submission server from negotiator.

9. Rod Walker IC 13th March 2002

10. JIM components Information & Monitoring. Currently: grid sensors > ldap > MDS > PHP Developing: grid sensors > xml > native Db > PHP, other. Reliability, flexibility, persistency. Same model works for grid system book-keeping and user level monitoring.

11. Rod Walker IC 13th March 2002 Information Flow User Interfac e Condor-G Information And Monitoring Gatekeeper Batch Syestem Grid Sensors Compute Resource GRAM Condor Negotiator Condor Collector Condor Grid Manager External Code Execution Site Parser JDL ClassAd Cin Cout User Interfac e Parser Condor Schedd Condor Schedd Condor Schedd Condor Collector Condor Collector Grid Sensors Condor Negotiator Condor Negotiator External Code Condor Grid Manager Condor Grid Manager Gatekeeper Batch Syestem Compute Resource

12. Rod Walker IC 13th March 2002 RunJob Vital tool for d0 MC productions on farms. Chains, steers and parallelizes d0 executables. Creates metadata. Use SAM to store to MSS. Now interfaced to SAM for input, and can handle real data and any d0 executables. Will be used for skimming, re-processing datasets, and user analysis. Fully automate monitoring, checking and storage. Work underway by UK.

13. Rod Walker IC 13th March 2002 RunJob status Maintenance & development of RunJob, and interface to SAM-Grid entirely by UK. CMS using branch of RunJob for production. Dave Evans and Greg Graham collaborating on merging branches. Goal: Single package with EDG and SAM-Grid interfaces. Runjob “server” or job-manager.

14. Rod Walker IC 13th March 2002 SAM-Grid Logistics Site Resource Selector Info Collector Info Gatherer Match Making User Interface Submission Global Job Queue Grid Client Submission User Interface Global DH Services SAM Naming Server SAM Log Server Resource Optimizer SAM DB Server RCMetaData Catalog Bookkeeping Service SAM Stager(s) SAM Station (+other servs) Data Handling Worker Nodes Grid Gateway Local Job Handler (CAF,RunJob,Vanilla,...) JIM Advertise Local Job Handling Cluster AAA Dist.FS Info Manager XML DB server Site Conf. Glob/Loc JID map... Info Providers MDS MSS Cache Site Web Serv Grid Monitoring User Tools

15. Rod Walker IC 13th March 2002 Conclusions o Core SAM supported by FNAL CD o Operational support via software shifts. o UK currently contributes 2 experts on shift. o JIM post-development support, o bug fixing, deployment issues (like SAM). o will need software support shifts. o RunJob is and will be UK supported. o Expanding functionality – analysis,reprocessing. o Increasing deployment – d0 sites, CMS. o On target for end-March deliverable, and production Grid in April.

16. Rod Walker IC 13th March 2002 JIM V1: Package dependencies jim_broker_client xml_meta_configurator sam_common jim_info_providers jim_broker orbacus sam_config globus jim_www server_run jim_advertise galax samgrid jim_client jim_jobmanagersjim_sandbox