The scientific computational work as portable workflows. Automatically locates the necessary input data and computational resources, and manages storage space for executing data-intensive workflows on storage-constrained resources. Learn more.


From failures at runtime (fault-tolerance). Task are automatically retried in the presence of errors. A rescue workflow containing a description of only the work that remains is provided. Provenance is also captured (data, software, parameters, etc.). Learn more.


Failures in computations using a set of system provided debugging tools and an online workflow monitoring dashboard. Learn more.

Highlights from the Blog

Summer Pegasus Office Hours @ ORNL
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When? Every Monday and Wednesday from 10am to noon ET.   For how long? From June 20th to August 8th, 2018!!!   But Where? ORNL Building 5100 (Joint Institute for Computational Sciences), Room 227   Can I get in touch? Yes! Email me at    

Pegasus 4.8.2 Released
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We are happy to announce the release of Pegasus 4.8.2 . Pegasus 4.8.2 is a minor bug fix release Improvements [PM-1244] – analyzer is not showing location of submit file [PM-1262] – Condor DagMan no longer allows . in job names [PM-1264] – update pegasus-init and usc tutorial to account … Read More

Pegasus in the Sky with Data
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Pegasus and Ewa Deelman were recently featured in the USC Viterbi School of Engineering magazine. We hope you enjoy the story of Pegasus’ creation and successes as much as we do.    

Developing Pegasus Workflows via Jupyter Notebooks
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We will be holding regular online Pegasus Office Hours starting Friday April 13th at 11AM Pacific.Initially, they will be held on a bi-monthly basis on second Friday of the month, and will address user questions and also apprise the community of new developments.We will have an overview presentation on how … Read More

Pegasus related talks and topics at the 2018 OSG All Hands Meeting
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Last week, Open Science Grid held its annual All Hands Meeting, this time hosted by University of Utah. It was a pleasure to meet Pegasus users and see their talks. A big thank you to those projects and presenters, for sharing their experiences and continued use of Pegasus. Here are … Read More

CyVerse Container Camp
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Pegasus team members will be giving an overview of how to use containers in Pegasus workflows, at the CyVerse Container Camp, March 7-9 at University of Arizona, Tucson. The Pegasus portion is currently scheduled for Friday, but the rest of the agenda is packed with related and interesting topics such … Read More

Pegasus Contributed to New Gravitational-Wave Detector Discovery
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  A collaboration that began 16 years ago between computer scientists at the USC Information Sciences Institute (ISI) and members of the Laser Interferometer Gravitational-Wave Observatory (LIGO) and Virgo projects is opening up a new window onto the nature of the universe. Pegasus, a specialized computer program developed by a … Read More

Nobel Prize-winning discovery on Gravitational Waves came about with contributions from Pegasus
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  By Emily Gersema, USC News The Nobel Prize-winning discovery that gravitational waves exist in the universe, which in turn further confirmed Albert Einstein’s General Theory of Relativity, was made possible in part by a collaboration with USC computer scientists. By developing a specialized computer program called Pegasus, a team … Read More