W. S. Betts

Automated Finite State Workflow for Distributed Data Production

Levente Hajdu, Lidia Didenko, J. Lauret, J Amol et autres

In statistically hungry science domains, data deluges can be both a blessing and a curse. They allow the narrowing of statistical errors from known measurements, and open the door to new scientific opportunities as research programs mature. They are also a testament …

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POSIX and Object Distributed Storage Systems Performance Comparison Studies With Real-Life Scenarios in an Experimental Data Taking Context Leveraging OpenStack Swift & Ceph

M D Poat, J. Lauret, W. S. Betts

The STAR online computing infrastructure has become an intensive dynamic system used for first-hand data collection and analysis resulting in a dense collection of data output. As we have transitioned to our current state, inefficient, limited storage systems have become an impediment …

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Configuration Management and Infrastructure Monitoring Using CFEngine and Icinga for Real-time Heterogeneous Data Taking Environment

M D Poat, J. Lauret, W. S. Betts

The STAR online computing environment is an intensive ever-growing system used for real-time data collection and analysis. Composed of heterogeneous and sometimes groups of custom-tuned machines, the computing infrastructure was previously managed by manual configurations and inconsistently monitored by a combination of …

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Compressibility and permeability of Gulf of Mexico mudrocks, resedimented and in-situ

W. S. Betts

Uniaxial consolidation tests of resedimented mudrocks from the offshore Gulf of Mexico reveal compression and permeability behavior that is in many ways similar to those of intact core specimens and field measurements. Porosity (n) of the resedimented mudrock also falls between field …

Permeability and Compressibility of Resedimented Gulf of Mexico Mudrocks

Peter B. Flemings, W. S. Betts

Summary We used resedimentation and constant rate of strain (CRS) compression tests to study the compaction and permeability evolution of material derived from Plio-Pleistocene aged mudrock from the Eugene Island Block 330 oilfield, offshore Louisiana. We compare our results to previously published …

Liquid limit as a predictor of mudrock permeability

Brendan J. Casey, John T. Germaine, Peter B. Flemings, Julia Schneider Reece et autres

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Online Meta-data Collection and Monitoring Framework for the STAR Experiment at RHIC

D. Arkhipkin, J. Lauret, W. S. Betts, G. Van Buren

The STAR Experiment further exploits scalable message-oriented model principles to achieve a high level of control over online data streams. In this paper we present an AMQP-powered Message Interface and Reliable Architecture framework (MIRA), which allows STAR to orchestrate the activities of …

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A message-queuing framework for STAR's online monitoring and metadata collection

D. Arkhipkin, J. Lauret, W. S. Betts

We report our experience on migrating STARs Online Services (Run Control System, Data Acquisition System, Slow Control System and Subsystem Monitoring) from direct read/write database accesses to a modern non-blocking message-oriented infrastructure. Based on the Advanced Messaging Queuing Protocol (AMQP) and standards, …

STAR load balancing and tiered-storage infrastructure strategy for ultimate db access

D. Arkhipkin, J. Lauret, W. S. Betts, Lidia Didenko et autres

In recent years, the STAR experiment's database demands have grown in accord not only with simple facility growth, but also with a growing physics program. In addition to the accumulated metadata from a decade of operations, refinements to detector calibrations force user …

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Permeability and compressibility of resedimented Gulf of Mexico mudrock

W. S. Betts, Peter B. Flemings, J. Schneider

An SSH key management system: easing the pain of managing key/user/account associations

D. Arkhipkin, W. S. Betts, J. Lauret, A. Shiryaev

Cyber security requirements for secure access to computing facilities often call for access controls via gatekeepers and the use of two-factor authentication. Using SSH keys to satisfy the two factor authentication requirement has introduced a potentially challenging task of managing the keys …

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The STAR time projection chamber: a unique tool for studying high multiplicity events at RHIC

Michael G. Anderson, J. Berkovitz, W. S. Betts, V. Singh et autres

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