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Benefits of an image-oriented parallel file system

Publications associées (44)

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Offline file assignments for online load balancing

Monika Henzinger, Ingmar Weber

We study a novel load balancing problem that arises in web search engines. The problem is a combination of an offline assignment problem, where files need to be (copied and) assigned to machines, and an online load balancing problem, where requests ask for ...

2011

Flash in a DBMS: Where and How?

Anastasia Ailamaki, Manoussos Gavriil Athanassoulis, Radu Ioan Stoica

Over the past decade, new solid state storage technologies, with flash being the most mature one, have become increasingly popular. Such technologies store data durably, and can alleviate many handicaps of hard disk drives (HDDs). Nonetheless, they have ve ...

2010

Current-induced vortex dynamics and pinning potentials probed by homodyne detection

Using a homodyne detection scheme, we show that we can determine the polarity and chirality of a magnetic vortex in an asymmetric magnetic disk as well as the resonance frequency and phase shift of the dynamic vortex gyration excited by a spin-polarized cu ...

2010

Issues in petabyte data indexing, retrieval and analysis

Sébastien Ponce

We propose several methods for speeding up the processing of particle physics data on clusters of PCs. We present a new way of indexing and retrieving data in a high dimensional space by making use of two levels of catalogues enabling an efficient data pre ...

EPFL2006

On Multidimensional Data and Modern Disks

Anastasia Ailamaki

With the deeply-ingrained notion that disks can efficiently access only one dimensional data, current approaches for mapping multidimensional data to disk blocks either allow efficient accesses in only one dimension, trading off the efficiency of accesses ...

USENIX Association2005

Concurrency Control for Transactional Drago

Jörg Kienzle

The granularity of concurrency control has a big impact on the performance of transactional systems. Concurrency control granu- larity and data granularity (data size) are usually the same. The e ect of this coupling is that if a coarse granularity is used ...

Springer Verlag2002

Spinouts and innovation in the disk drive industry: Do founders take static or dynamic capabilities with them?

Christopher Tucci, Andrew King

Spinouts and innovation in the disk drive industry: Do founders take static or dynamic capabilities with them? ...

2002

The visible human slice sequence animation web server

Roger Hersch

Since June 1998, EPFL's Visible Human Slice Server (http://visiblehuman.epfl.ch) allows to extract arbitrarily oriented and positioned slices. More than 300,000 slices are extracted each year. In order to give a 3D view of anatomic structures, a new servic ...

Society of Photo-Optical Instrumentation Engineers2001

SFIO a striped file I/O library for MPI

Roger Hersch, Emin Gabrielyan

This paper presents the design and evaluation of a Striped File I/O (SFIO) library for parallel I/O within an MPI environment. We present techniques for optimizing communications and disk accesses for small striping factors. Using MPI derived datatype capa ...

IEEE Computer Society2001

Parallel computation of radio listening rates

Roger Hersch, Monica Marcela Gomez Leon, Marc Mazzariol

Obtaining the listening rates of radio stations in a function of time is an important instrument for determining the impact of publicity. In order to significantly improve the determination of radio listening rates, special watches have been developed whic ...

SPIE-Int. Soc. Opt. Eng2000