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US Lattice QCD Collaboration Data Grid Activities

US Lattice QCD Collaboration Data Grid Activities. www.usqcd.org. www.lqcd.org/ildg. Lattice QCD collaborations world-wide have agreed to standardize methods for interchanging precious lattice QCD data files. International Lattice QCD Data Grid. www.lqcd.org/ildg.

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US Lattice QCD Collaboration Data Grid Activities

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  1. US Lattice QCD Collaboration Data Grid Activities www.usqcd.org www.lqcd.org/ildg

  2. Lattice QCD collaborations world-wide have agreed to standardize methods for interchanging precious lattice QCD data files. International Lattice QCD Data Grid www.lqcd.org/ildg Members represent major collaborations: • Australia (Adelaide) • France, Germany and Italy (LATFOR) • Japan (CP-PACS and JLQCD) • United Kingdom (UKQCD) • USA (USQCD)

  3. Lattice data are already available • NERSC archive qcd.nersc.gov/ • LATFOR portal www-zeuthen.desy.de/latfor/ldg/ • CP-PACS/JLQCD portal www.lqa.ccs.tsukuba.ac.jp/ The NERSC archive data represents 10's of Tflop·years of supercomputing effort.

  4. The ILDG is a grid of grids Member collaborations maintain their own metadata catalogs, replica catalogs and file transfer tools. ILDG transactions are forwarded to the collaboration grids.

  5. USQCD gridware status • USQCD software supports ILDG file format www.usqcd.org/usqcd-software • Storage Resource Manager (SRM) data transfers • Fermilab dcache disk/tape archive • Jlab tape archive • Metadata catalog based on native XML database to be developed at Fermilab. • Replica catalog to be developed at Jlab.

  6. File transfer tests On-demand provisioning of high-performance network pathways for scientific data flows. DOE FNAL CalTech www.lambdastation.org/ Test transfers between the DESY physics laboratory in Hamburg Germany and Fermilab in the U.S. • Route: Fermilab ↔ ESNet ↔ DANTE ↔ DFN ↔ DESY • Memory-to-memory (iperf) 55 MB/sec peak. • 24 hr average disk-to-disk 19 MB/sec (1.6 TB/day). • Rate well below expectations for this network route. • Rate exceeds ILDG requirements.

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