Pegasus WMS – Automate, recover, and debug scientific computations

The Pegasus team is very happy to hear about LIGO’s incredible discovery: the first detection of gravitational waves from colliding black holes. We congratulate the entire LIGO Scientific Collaboration and the Virgo Collaboration on this incredible achievement.

frame0320 — 0.2 Second before the black holes collide. Image credit: SXS/LIGO

The Pegasus team is very pleased to have contributed to LIGO’s software infrastructure. One of the main analysis pipelines used by LIGO to detect the gravitational wave was executed using Pegasus Workflow Management System (WMS). The PyCBC analysis pipeline analyzed data from the two LIGO detectors. Initially the analysis was managed by Pegasus WMS on the LIGO Data Grid. LIGO extended their computations to the nation-wide cyber-infrastructures, Open Science Grid and XSEDE. Pegasus aided this expansion by managing cross-site data transfers and computations in a reliable, scalable, and efficient manner. Pegasus enables LIGO researchers to easily monitor and analyze their workflows via a web based dashboard, and a suite of command line tools.

Additional Information:

Water is seen as small red and white molecules on large nanodiamond spheres.(Image credit: Michael Mattheson, OLCF, ORNL)

The Pegasus team is very happy to hear about the cutting-edge research and development that can help solve some of the challenges associated with drug delivery discovery: “The motions of a tRNA (or transfer RNA) model system can be enhanced when coupled with nanodiamonds, or diamond nanoparticles approximately 5 to 10 nanometers in size”. The discovery involved ORNL's Spallation Neutron Source, which provides the most intense pulsed neutron beams in the world for scientific research and industrial development, and ORNL's Titan supercomputer, the nation's most powerful for open science. By comparing the SNS neutron scattering data with the data from the team's molecular dynamics simulations on Titan, the researchers have confirmed that nanodiamonds enhance the dynamics of tRNA when in the presence of water; This analysis was performed with the Pegasus WMS.

Highlights from the Blog

Job Openings

by Rafael Ferreira da Silva on November 7, 2019 with No Comments

The SciTech group does research and development on software systems to help scientists manage large-scale computations. We work with scientists in domains ranging from genomics and proteomics to seismology and gravitational wave physics. We help scientists deploy their computations on some of the largest and fastest computing systems in the … Read More

Pegasus Workflows on OLCF Summit

by George Papadimitriou on November 4, 2019 with No Comments

Summit is a leadership-class computing system for open science that is hosted at the Oak Ridge National Laboratory. Summit, launched in 2018, delivers 8 times the computational performance of Titan’s 18,688 nodes, using only 4,608 nodes. Its architecture with the associated GPU resources, makes it an attractive resource for scientists … Read More

Pegasus and Dynamo Aiding Weather Scientists

by George Papadimitriou on October 24, 2019 with No Comments

Computational science today depends on many complex, compute and data-intensive applications operating on distributed datasets that originate from a variety of scientific instruments and data repositories. Two major challenges for these applications are (1) the provisioning of compute resources and (2) the integration of data into the scientists’ workflow. Background … Read More

Meet us @ SC19

by Rafael Ferreira da Silva on October 14, 2019 with No Comments

The Pegasus (SciTech) group will be actively participating in several events and presenting talks in workshops, panels, and exhibitors booths at SC19. Find below a list of events where you can meet our team. We look forward to seeing you in Denver, CO! … Sunday Nov 17: 14th Workflows in … Read More

Pegasus 4.9.2 Released

by Karan Vahi on August 7, 2019 with No Comments

We are happy to announce the release of Pegasus 4.9.2. Pegasus 4.9.2 is a minor bug fix release after Pegasus 4.9.1. This release has support for retrieval of datasets from HPSS, and improved events that can be sent to AMQP endpoints for users to build custom dashboards. Additionally, all PegasusLite … Read More

eScience 2019 and Gateways 2019 Talks and Events

by George Papadimitriou on July 30, 2019 with No Comments

The Pegasus (SciTech) group will be presenting several talks at various workshops and main conference sessions for both the eScience 2019 and Gateways 2019 conferences. See below for a list of our team’s events (details pending). If you would like to meet with the Pegasus team in person, please email … Read More

Let us know how you use Pegasus!

by Mats Rynge on June 7, 2019 with No Comments

Is Pegasus an integral part of your work? If so, we want to know! We love to keep up with all the ways in which Pegasus is applied. Regardless of subject or field, the Pegasus Team wants to know how our users are benefiting from Pegasus and how we can continue to … Read More

XENON1T observed the rarest decay process ever measured

by Mats Rynge on May 16, 2019 with No Comments

Congratulations to our collaborator XENON1T who just observed the rarest decay process ever measured! While this liquid xenon Time Projection Chamber is designed to search for dark matter, its ultra-low background allows the chamber to be sensitive to a large range of rare processes. One of these is the 2 … Read More

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Pegasus powers LIGO gravitational wave detection analysis

Diamonds that Deliver!