PPDG Meeting with NP

1
PPDG Meeting with NP

• 22 Nov 2002

2
PPDG
3
Outline

• What is PPDG
• Benefits to NP from PPDG
• How expts participate in PPDG
• What does it mean for more np expts to
  participate in PPDG

4
Data grid goals

• Uniform access to distributed compute storage
  resources
• Resource sharing according to policies
  allocations
• Single sign-on, security, accountability (AAA)
• Relative ease for new sites to join grid and add
  resources

5
What is PPDG

• Active collaborations between experiment and
  computer science groups
• Advance experiments by
• Integration of new technology
• Achieve greater degree of standardization between
  expts
• Educate cs on real expt. Computing problems
• Educate physicists on cs tech
• Advance cs by
• Application of cs tech. In expt. Physics
  computing smelter, hardening, exposure of
  weaknesses
• Achieve more complete realistic functionality
  of cs tech
• Educate physicists cs
• Started in 1999 under NGI funding, currently 1
  yr through 3 year SciDAC funding

6
Who is PPDG

• PIs - Mount (SLAC), Livny (Wisconsin), Newman
  (Caltech)
• Coordinators - Pordes (steering chair), Olson
• Experiments
• ATLAS, BaBar, CMS, D0, STAR, JLAB
• CDF has been collaborating w/ D0 has requested
  to join PPDG
• Computer Science
• Condor (Livny), Globus (Foster), LBL/SDM
  (Shoshani), SDSC/SRB (Moore)

7
STAR - PPDG

• File transfer BNL lt-gt LBNL (in production)
• X509 identify certificates (DOE Science Grid)
• GridFTP (globus)
• HRM (hierarchical storage resource manager -
  interface to hpss disk cache)
• Efficient, control bandwidth usage, automated
  file transfer (typically 1000 files / request)
• Job submission to distributed systems (next)
• Load balance between RCF, PDSF
• Process data on distributed disks
• Single sign-on job submission
• Replicated distributed databases
• File catalog
• Calibration database

8
HRM
9
JLab - PPDG

• Transition from centralized to distributed
  computing model
• Client site installed at FSU
• Data access to Jasmine
• Job submission
• Peer site with MIT for LQCD
• SRM interoperability with FNAL, LBNL
• Working on common job description specs

10
JLab Grid file manager
11
Security Accountability

• Single sign-on for access to computer resources
  (using x509 certificate)
• BNL, LBNL, JLAB participating in PPDG Site-AAA
  (authentication, authorization, accounting)
• Integration of grid identify with normal user
  registration procedures
• Develop/integrate authorization methods with site
  procedures
• Integrate with accounting methods (eventually)
• Collaboration with 5 DOE labs, Globus, Europeans
  (EDG, DataTAG)

12
Potential NP additions to PPDG

• PHENIX ALICE-USA have expressions of interest
• Steering committee needs to understand technical
  integration with ongoing or future PPDG work
• Impact on and support of computer science groups
  needs to be understood
• What about Glue-X/Hall D?