Date post: | 04-Jan-2016 |
Category: |
Documents |
Upload: | damian-rose |
View: | 213 times |
Download: | 0 times |
1
ILDG Status in Japan
Lattice QCD Archive(LQA)
a gateway to ILDG Japan Grid
HEPNet-J/sc
an infrastructure for Japan Lattice QC
D Grid
A. UkawaCenter for Computational SciencesUniversity of Tsukuba
2
LQA Overview
stores gauge configurations and makes them available to lattice community world-wide
Open since February 2004/maintained by CCS will be a Japan site of ILDG configurations
CP-PACS Nf=2 configurations already available
CP-PACS/JLQCD Nf=2+1 configurations in near future
Access policy no authentication requires registration to download acknowledge downloading from LQA (cite relevant papers) when configurations ar
e used for publications
http://www.lqa.ccs.tsukuba.ac.jp/
http://www.lqa.ccs.tsukuba.ac.jp/Nf21config.html
http://www.lqa.ccs.tsukuba.ac.jp/CPPACSconfig.html
3
CP-PACS/JLQCD Nf=2+1 configurations
RG-improved glue + Clover quark with NP Csw
three lattice spacings a=0.122,0.100,0.07 fm /
10 (Kud,Ks) combinations
6000 – 8000 trajectory/beta,(Kud,Ks)
Will be released 6 months after publication of spectrum/quark mass paper
Lattice conference presentation of heavy quarks and eta’ (effectively
Lat’06)
In future, lighter ud quark configurations will be added using PACS
-CS3.04.06.08.0
m
m
4
LQA details
Architecture a prototype implementation of ILDG standard
XML files still in the old QCDML draft v4.0/conversion to the
official version QCDml1.1 is finished/will be implemented soon
file format also based on a previous proposal/conversion to the
official v1.0 soon
enables interactive search/implementation of middleware
Web service standards (when they are ready/approved)
user
MDC
metadata
server-side
client
webbrowser
html WSquery
Tomcat servlet Xindice
http://www.lqa.ccs.tsukuba.ac.jp/
5
LQA search page
6
LQA statistics
Statistics : example of June 2005 Number of registered users 57
Access to the top page 180 (per month)
Access to the search page 23 (per month)
#configs downloaded 2400 (per month)
7
HEPNet-J/sc Overview
Japanese domestic LQCD
network uses SuperSINET peer-to-p
eer 1Gbps private network
connections
major LQCD sites in Japan
are connected (see figure)
enables to construct a ded
icated network for LQCD in
Japan
8
HEPNet-J/sc Status (1)
Major machines and upgrade plan
SR8000/F11.2TFlops
24+ TflopsKEK
TsukubaCP-PACS0.6TFlops
PACS-CS14.3 Tflops
OsakaSX-5/128M81.3TFlops 24+ Tflops
Hiroshima SR11000 0.7TFlopsKyoto SX-5 → 1+TFlopsKanazawa PC-ClustersTsukuba VPP5000 0.8TFlops
(upgrade in a few years)
JAMSTEC
Earth Simulator
2.7% of 40TFlops (This year)
the Nf=2+1 project uses a part of these machines
March ‘06
June ‘06
March ‘06(not QCD dedicate)
9
HEPNet-J/sc Status (2)
shares configurations and other lattice data via file mirroring
total 60TB distributed over 6 sites used by several lattice groups in Japan
CP-PACS, JLQCD, QCD-Taro, Kanazawa etc.
production and measurement for the Nf=2+1 QCD project utilizes the file sharing very effectively
10
HEPNet-J/sc Future Plan
an issue size of one partition is limited to 1-2 TB, but size of data se
ts (for one project) easily exceeds the limit. Then, data are
distributed over many disks
uniform file system based on Grid Technology is required, s
uch as SRB (Storage Resource Broker)
Gfarm (Grid Data Farm)
will work as a backbone of LQA or ILDG-Japan
Grid
11
ILDG related activity
International Lattice Field Theory Network (ILFT Network) USA/UK/Germany/Italy/Japan Bi-annual workshops
3-6 October 2005 at JLAB, USA 8-11 March 2006 in Hayama, Japan
Exchange of people This year’s Special event :
“Perspectives in Lattice QCD” A lecture school in Nara, Japan, organized by Y. K
uramashiOctober 31-November 11 2006
http://www.ccs.tsukuba.ac.jp/workshop/ilft05/