Sharing Lattices Throughout the World:

An ILDG Status Report

ILDG

July 31, 2007

A consortium of regional grids

• Australia (CSSM)

• Europe (LatFOR)

(Austria, Switzerland, Germany, France, Italy)

• Japan (JLDG)

• UK (DiGS/QCDgrid)

• US (Gauge Connection + FNAL + BNL + JLab)

Purpose

• Facilitate the world-wide sharing of files

(currently gauge configurations) to speed scientific discovery.

• For some, a convenient collaboration repository, as well.

Spectrum of Access Policies

• All lattices available as soon as they are generated – (some collaborations)

• Recent lattices available after negotiation. (most collaborations)

• All lattices available ~ six months after the first publication (universal)

• Citation and acknowledgment (universal)• Trend is toward increasing accessibility

Files

• QCDml document for each ensemble

• Lattice binary for each configuration– LIME format – reasonably flexible

• QCDml document for each configuration

Standard Mode of Access

• Browse (search) the ensemble metadata to select the desired ensemble

• List the desired lattices

• Download the lattice files– Involves grid certificates for authentication

• See live demonstration– Dirk Pleiter poster session.

ILDG Working Groups

• Metadata working group– Standards for QCDml (XML) markup schema

to annotate the files. (Also binary file format.)– See T. Yoshie’s poster.

• Middleware working group– Standards for file transfers (catalogs, grid tools,

etc.)

Highlights of What is Available

• Apologies. My own biased selection based on a cursory inquiry.

• Just an overview. No attempt at exhaustive detail.

• I will try to point out what has been opened to general access in the past year.

Australia/CSSM available/planned

Flavorsfermion/gluon action

Collaboration a(fm)approx#configs

Availability

0 Tadpole LW Adelaide 0.128 400Available

2FLIC’/Tadpole LW

Adelaide 0.125 400 x ?In production

Europe/LatFor

LatFor available/planned

Flavorsfermion/gluon action

Collaboration a (fm)approx#configs

Availability

2NP-clover/Wilson plaq

QCDSF 0.07/0.11 5000x16 Negotiable

2tmQCD/tlSym

ETMC 0.07/0.11 3500x15 Negotiable

2+1 stout/Tadpole LW

QCDSF 0.08 ? In progress

2+1+1Stouted tmQCD/tlSym ETMC

?? ? Planned

Japan/JLDG

Kanazawa

Kyoto

HiroshimaKEK

Tsukuba

Osaka

ILDG

JLDG available/planned

flavorsfermion/gluon action

collaboration a(fm)approx#configs

availability

2Wilson-clover/Iwasaki

CP-PACS

0.20 1000x4

available0.15 1000x4

0.10 800x4

2Wilson-clover/Plaquette

JLQCD 0.10 1200x5 in preparation

2+1Wilson-clover/Iwasaki

CP-PACS+JLQCD

0.12 800x5x2

available(New)

0.10 800x5x2

0.07 600x5x2

2overlap/Iwasaki

JLQCD 0.12 O(500)x6after 1st paper on spectrum

UK/DiGS (UKQCD)/BNL(RBC)

UK/DiGS/BNL available/planned

Flavorsfermion/gluon action

Collaboration a(fm)approx#configs

Availability

2+1DWF/Iwasaki

UKQCD/RBC 0.12 800x4 Available

2+1 DWF/DBW2

UKQCD/RBC 0.12300-1000

Available

2DWF/DBW2

UKQCD/RBC 0.12 1000x3 Available

2+1 Asqtad/Tadpole LW

UKQCD 0.12 3000 Available

2+1DWF/Iwasaki

UKQCD/RBC 0.09 ?? Restricted

2+1DWF/Iwasaki

UKQCD/RBC 0.09 ?? X 2 In production

US/NERSC/FNAL/JLab available/planned

Flavorsfermion/gluon action

Collaboration a(fm)approx#configs

Availability

2+1Asqtad/tadpole LW

MILC 0.15 600 x 4 Available

2+1Asqtad/tadpole LW

MILC0.12 600 x 5 Available*

2+1 Asqtad/tadpole LW

MILC0.09

500 x 2 500 x 1

NewAvailable*

2+1Asqtad/tadpole LW

MILC 0.06 500 x 2In productionAvailable

2+1Anisotropic clover/??

LHPC 0.125 ?? X 4 Planned

2+1Anisotropic clover/??

LHPC 0.10 ?? X 4 Planned

2+1Anisotropic clover/??

LHPC 0.08 ?? X 4 Planned

*Extensions underway

Conclusions

• The ILDG is up and working (mostly)

• See the ILDG demonstration during the poster session

Websites

• CSSM http://cssm.sasr.edu.au/ildg/

• LatFOR http://www-zeuthen.desy.de/latfor/

• NERSC http://qcd.nersc.gov/

• DiGS http://forge.nesc.ac.uk/projects/qcdgrid/

• BNL https://qcdlattices.bnl.gov/

• JLGD http://www.jldg.org/lqa/index.html

• QCDml http://www.lqcd.org/ildg/