The DZero/PPDG D0/PPDG mission is to enable fully distributed computing for the experiment, by enhancing SAM as the distributed data handling system of.

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Presentation transcript:

The DZero/PPDG D0/PPDG mission is to enable fully distributed computing for the experiment, by enhancing SAM as the distributed data handling system of D0, incorporating standard Grid tools and protocols, and developing new solutions for Grid computing together with Computer Scientists. The two main areas of work are Job Handling (including specification, brokering, scheduling etc.) and Monitoring and Information Services.

The DZero/PPDG Test Bed Test bed composition as of Feb 2002: 3 PC at Fermilab (sammy, samadams, sameggs) Contact: Gabriele Garzoglio 1 PC at Imperial College (sampc.hep.ph.ic.ac.uk) Contact: Rod Walker 1 PC at Lancaster (fal000phys03.lancs.as.uk) Contact: Alex Finch All machines have the Globus Toolkit 2.0 beta installed. 4 machines run SAM. Fermilab is buying more machines. Collaborators have been responsive in joining the effort.

The use of the Test Bed Past usage (Jan - Feb): Installing the Globus Toolkit 2.0 beta at the sites. GridFTP Evaluation of GridFTP Packaging of GridFTP as sam_gridftp to be used by SAM. So far transfers are authenticated with a passwordless certificate for user sam. MDS Evaluation an understanding of the LDAP-based information services. Globus Security Infrastructure Tests of the DOEScience Certificate Authority

The use of the Test Bed (...cont’d) On going usage (Mar): Job Submission Setting up 2 client nodes (1 at Fermilab, 1 at IC) + 3 batch system nodes (PBS and Condor at Fermilab, PBS at IC). Any LSF system available? Tests with submission using GRAM Test with submission using Condor-g Globus Security Infrastructure Working with Dane Skow to identify interoperability of GSI with Kerberos. GRAM/Condor-g Client (Fermilab) (IC) PBS Gate keeper Condor LSF (??)

The use of the Test Bed (...cont’d) Near future usage (Apr/May): Integration of the Globus Security Infrastructure with SAM Authentication/Authorization Service: using the GSI certificate identity to identify SAM users; using sam-service proxy for data transfers GSI-enable Station, FSS, Stager and EWorker Client User Proxy Stager/EWorker Server Proxy Station Authorization Service Grid FTPd 1 2 3 4 5 6 7

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