Proceedings of the third international workshop on Large-scale system and application performance - LSAP '11

2011 ◽  
Author(s):  
Janet Fransen ◽  
Lara Friedman-Shedlov ◽  
Nicole Theis-Mahon ◽  
Stacie Traill ◽  
Deborah Boudewyns

While many other academic libraries are currently or have recently faced the challenge of setting a new direction for their discovery platforms, the University of Minnesota is perhaps unique in its phased approach to the process. In the spring of 2011, the University of Minnesota Libraries appointed a Discoverability task force to identify a Web-scale discovery solution, the third phase in the Discoverability research process. Discoverability 3 Task Force members are now synthesizing the work of two previous phases and other relevant internal and external analyses to develop requirements and selection criteria for the solution. Some of these requirements and criteria are standard for any large-scale system implementation. Others were derived from the findings of the previous two phases of the Discoverability project. The authors discuss the Libraries’ phased approach to developing a vision for discovery and selecting a solution that puts the Libraries on a path to fulfilling that vision.


2005 ◽  
Vol 15 (04) ◽  
pp. 387-395 ◽  
Author(s):  
DARREN J. KERBYSON ◽  
ADOLFY HOISIE ◽  
HARVEY J. WASSERMAN

In this paper we describe an important use of predictive application performance modeling - the validation of measured performance during a new large-scale system installation. Using a previously-developed and validated performance model for SAGE, a multidimensional, 3D, multi-material hydrodynamics code with adaptive mesh refinement, we were able to help guide the stabilization of the first phase of the Los Alamos ASCI Q supercomputer. We review the salient features of an analytical model for this code that has been applied to predict its performance on a large class of Tera-scale parallel systems. We describe the methodology applied during system installation and upgrades to establish a baseline for the achievable "real" performance of the system. We also show the effect on overall application performance of certain key subsystems such as PCI bus speed and multi-rail networks. We show that utilization of predictive performance models is also a powerful system debugging tool.


2013 ◽  
pp. 116-123
Author(s):  
Claire Bompaire-Evesque

This article is a inquiry about how Barrès (1862-1923) handles the religious rite of pilgrimage. Barrès stages in his writings three successive forms of pilgrimage, revealing what is sacred to him at different times. The pilgrimage to a museum or to the birthplace of an artist is typical for the egotism and the humanism of the young Barrès, expressed in the Cult of the Self (1888-1891). After his conversion to nationalism, Barrès tries to unite the sons of France and to instill in them a solemn reverence for “the earth and the dead” ; for that purpose he encourages in French Amities (1903) pilgrimages to historical places of national importance (battlefields; birthplace of Joan of Arc), building what Nora later called the Realms of Memory. The third stage of Barrès’ intellectual evolution is exemplified by The Sacred Hill (1913). In this book the writer celebrates the places where “the Spirit blows”, and proves open to a large scale of spiritual forces, reaching back to paganism and forward to integrative syncretism, which aims at unifying “the entire realm of the sacred”.


2008 ◽  
Author(s):  
Steven M. Bellovin ◽  
Salvatore J. Stolfo ◽  
Angelos D. Keromytis

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