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

Pegasus 4.8.4 Released
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We are happy to announce the release of Pegasus 4.8.4 . Pegasus 4.8.4 is a minor bug fix release. Improvements [PM-1294] – update flask dependency [PM-1277] – pegasus workflows on OSG should appear in OSG gratia [PM-1288] – pegasus.project profile key is not set for SLURM submissions Bugs Fixed [PM-1282] … Read More

NSF OAC Webinar Series: Science Impact of Sustained Cyberinfrastructure: The Pegasus Example
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Dr. Deelman was invited to kick off the National Science Foundation (NSF) Office of Advanced Cyberinfrastructure (OAC) 2018 monthly webinar series.   OAC – CI Webinar Series Theme and Purpose: The 2018 webinar series will focus on the translational impact of Advanced Cyberinfrastructure and will highlight how cyberinfrastructure innovations have … Read More

Integrity Checking in Pegasus
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We will be holding regular online Pegasus Office Hours this Friday August 10th at 11AM Pacific. For this series, we will have an overview presentation on Integrity Checking in Pegasus. This new capability will be introduced in the upcoming Pegasus 4.9.0 release. We hope to see you online on August 10th. Please feel to … 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.    

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