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Standardizing Lattice QCD Data Exchange Across Global Collaborations

The International Lattice QCD Data Grid (ILDG) unites major worldwide collaborations, including members from Australia, France, Germany, Italy, Japan, the UK, and the USA, to standardize methods for exchanging vital lattice QCD data files. The NERSC archive and various collaboration portals provide access to immense computational datasets. With ongoing advancements in file transfer tools and metadata catalogs, this initiative aims to enhance the efficiency and accessibility of lattice QCD data, supporting high-performance scientific workflows.

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Standardizing Lattice QCD Data Exchange Across Global Collaborations

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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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