The open science grid

Pordes, R.; Petravick, Don; Kramer, Bill; Olson, D. A.; Livny, Miron; Roy, Alain; Avery, P.; Blackburn, K.; Wenaus, T.; Würthwein, F.; Foster, Ian; Gardner, R.; Wilde, Mike; Blatecky, Alan; McGee, John; Quick, Rob

doi:10.1088/1742-6596/78/1/012057

Cited by 657 publications

(449 citation statements)

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“…The material presented here is based upon work supported by the U.S. Department of Energy, Office of Science, Nuclear Physics program under Award Number DE-FG02-05ER41368. An important part of the computations performed in this research was done using resources provided by the Open Science Grid, which is supported by the National Science Foundation and the U.S. Department of Energy's Office of Science [53,54].…”

Section: Acknowledgmentsmentioning

confidence: 99%

Massive fermions without fermion bilinear condensates

Ayyar

Chandrasekharan

2015

Phys. Rev. D

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We study a lattice field theory model containing two flavors of massless staggered fermions with an onsite four-fermion interaction. The model contains a SU (4) symmetry which forbids nonzero fermion bilinear mass terms, due to which there is a massless fermion phase at weak couplings. However, even at strong couplings fermion bilinear condensates do not appear in our model, although fermions do become massive. While the existence of this exotic strongly coupled massive fermion phase was established long ago, the nature of the transition between the massless and the massive phase has remained unclear. Using Monte Carlo calculations in three space-time dimensions, we find evidence for a direct second order transition between the two phases suggesting that the exotic lattice phase may have a continuum limit at least in three dimensions. A similar exotic second order critical point was found recently in a bilayer system on a honeycomb lattice.

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Section: Acknowledgmentsmentioning

confidence: 99%

Massive fermions without fermion bilinear condensates

Ayyar

Chandrasekharan

2015

Phys. Rev. D

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“…Other institutions generally only have limited access to shared campus resources or smaller compute clusters. Additionally, there is significant availability of opportunistic resources via providers like the Open Science Grid [2]. Currently, over 50% of all CPU resources are opportunistic.…”

Section: Icecube and Computingmentioning

confidence: 99%

IceCube simulation production and the transition to IceProd2

Schultz

2016

EPJ Web of Conferences

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Abstract. IceCube's simulation production relies largely on dynamic, heterogeneous resources spread around the world. Datasets consist of many thousands of job workflow subsets running in parallel as directed acyclic graphs (DAGs) and using varying resources. IceProd is a set of Python daemons which process job workflow and maintain configuration and status information on jobs before, during, and after processing. IceProd manages a complex workflow of DAGs to distribute jobs across all computing grids and optimize resource usage. IceProd2 is a new version of IceProd with substantial increases in security, reliability, scalability, and ease of use. It is undergoing testing and will be deployed this fall.

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“…In this case, the researcher processes the data individually and distributes the final product only. Most of the popular astronomical software languages and packages (ITT Interactive Data Language-IDL, 7 European Southern Observatory Munich Image Data Analysis System-ESO midas, 8 Image Reduction and Analysis Facility-iraf 9 ) assume standalone approach to work with the data. In the case of all these packages the storage of the raw and processed data is a responsibility of the user.…”

Section: Astro-wise At a Glancementioning

confidence: 99%

“…This middleware combines components from a number of sources, including LCG 24 (Large Hadron Collider Computing Grid), VDT 25 (Virtual Data Toolkit), which is also used by Open Science Grid 26 [8] and contains software from Globus 27 [9] and Condor 28 [10], and from gLite itself. The middleware tries to make use of well defined international standards, where it is possible.…”

Section: Egeementioning

confidence: 99%