Latest News

January 2008:  Earth-quaking science in Hollywood - (Pegasus enabled application) - Image of the Week in International Science Grid This Week (ISGTW)
December 2007:  Montage a rising star in grid-enabled sky mosaics (Pegasus enabled application) - Feature article in International Science Grid This Week (ISGTW)
September 2007:  Pegasus invites new communities to saddle up - Feature article in International Science Grid This Week (ISGTW)

Pegasus and DAGMAN receive an NSF award under the SDCI program. This award will support improvements to the our workflow tools as well as enable us to work with more applications running (or wanting to run) on today's cyberinfrastructure.
August 2007:  LIGO and Pegasus meet the 1,000 simulateanous jobs on OSG. Running across 15 different sites, a LIGO workflow was running 1,000 jobs simulatenously. This workflow was mapped onto the OSG resources using Pegasus and executed using DAGMan. The graph below (courtesy of Kent Blackburn and Britta Daubert, Caltech) shows jobs run everyday by LIGO on OSG. The milestone was reached on August 21st.

June 5th 2007:  Pegasus 2.0 RC1 is out.
June 7 2007:  Pegasus demo at Teragrid07.
June 5 2007:  Pegasus Poster at Teragrid07.
June 4 2007:  Pegasus 2.0 Tutorial at Teragrid07 (Afternoon).
May 2007:  Pegasus release 2.0 coming out in a few weeks.
Feb 2007:  LIGO and Pegasus met their second OSG milestone by running over 100 jobs continuously on the Open Science Grid:

January 2007:  LIGO and Pegasus met their first OSG milestone by running over 25 jobs continuously on the UCSD OSG Site:

December 2006: A paper that shows results of using Pegasus for running large-scale SCEC workflows on the TeraGrid receives the best paper award at the e-Science 2006 conference:

" Managing Large-Scale Workflow Execution from Resource Provisioning to Provenance tracking: The CyberShake Example," Ewa Deelman, Scott Callaghan, Edward Field, Hunter Francoeur, Robert Graves, Nitin Gupta, Vipin Gupta, Thomas H. Jordan, Carl Kesselman, Philip Maechling, John Mehringer, Gaurang Mehta, David Okaya, Karan Vahi, Li Zhao, e-Science 2006, Amsterdam, December 4-6, 2006
November 2006:  Pegasus brochure for SC"06
October 2006: Wings and Pegasus tutorial at ISI (materials here)
October 2006: Pegasus was used to generate the input data for a scalability test of a large-scale earthquake science simulation PetaShake on  the 40,960 Processor IBM Blue Gene Watson System. More information about  the scalability test can be found here.
September 2006:  Wings and Pegasus participate in the 1st Provenance Challenge (more information about the ISI entry here)
Summer 2006: Wings and Pegasus are shown to produce CyberShake calculations:

 Histogram of  the number of seismogram jobs vs. the time each job took to complete.

June 2006: Pegasus tutorial at TeraGrid 2006 meeting (materials)
May 2006:  Pegasus used to support Montage in the verification of a bar in the spiral galaxy M31, which represents a major scientific discovery in astronomy.

April 2006:Virtual Data System 1.4.4 released. Check it out at vds.isi.edu  
Nov 20 2005:Virtual Data System 1.4.2 released. Check it out at vds.isi.edu
Nov 18 2005: Ligo successfully runs several of their inspiral analysis workflows using Pegasus on the Open Science Grid. LIGO  Open Science Grid
Nov 8 2005:Pegasus enables SCEC to run large CyberShake simulations on Teragrid. More then 250000 jobs have already been run processing nearly 20TB of data. Link
Mar 3 2005:Learn how to improve your workflow"s performance by 90% ! Read here
Dec 5 2004:The Pegasus website is now in CVS. Please inform gmehta at isi dot edu if there is a broken link.
Nov 8 2004: SC2004 Griphyn Virtual Data System Tutorial M9. Download here
Nov 7 2004: SC2004 SC04 starts tommorow. See you there at the Argonne National labs and the USC booth.
Nov 4 2004: SC2004 Poster for pegasus is ready for printing. Download here.
Nov 4 2004: SC2004 Poster for pegasus applications is ready for printing. Download here.
October 20 2004: SC2004 Brochure is ready for the press. Download here.
September 2004: Pegasus has been used in demonstration of earthquake analysis: As part of the demonstrations at the annual SCEC (Southern California Earthquake Center) meeting, GriPhyN and iVDGL-developed software suite the Virtual Data Toolkit (http://www.cs.wisc.edu/vdt/) was used to support SCEC analysis.  Three different Seismic Hazard-related Calculations (Pathway 1, Pathway 2, and Pathway 4) were created and executed using the SCEC portal, in a secure manner. The system produced workflow templates (that identify the necessary computations and their sequence), populated them with data producing the abstract workflows, and then handed those to the GriPhyN Virtual Data System (VDS). Pegasus, one of the VDS components, mapped the workflows consisting of both MPI-based and single processor jobs onto the SCEC and USC grid. DAGMan and Condor-G executed the workflow components. One impressive aspect of the system was that there was a consistent workflow system under different seismic hazard programs. Previously, each SCEC pathway ran in amn independent and dissimilar manner. The following software was used in the demonstrations: NMI, VDT (including VDS), and MCS (the Metadata Catalog Service.)

This work represents the collaboration of scientists and developers from SCEC at USC and USC/ISI. Slides about this work can be found here.