048 Conferences false [["minutes", "Minutes"], ["notes", "Notes"], ["paper", "Paper"], ["poster", "Poster"], ["slides", "Slides"], ["summary", "Summary"]] CERN jean-yves.le.meur@cern.ch 3 chep06@tifr.res.in Computing in High Energy and Nuclear Physics False Tata Institute of Fundamental Research

Homi Bhabha Road Mumbai 400005 India

2006-02-13T08:00:00 2006-02-17T19:30:00 2004-12-02T15:40:08 2012-03-01T11:03:30 Europe/Zurich 125 false [["minutes", "Minutes"], ["notes", "Notes"], ["paper", "Paper"], ["poster", "Poster"], ["slides", "Slides"], ["summary", "Summary"]] Grid middleware and e-Infrastructure operation 1 poster Fermilab sinisa.veseli@cern.ch Fermilab sinisa.veseli@cern.ch Oxford University m.leslie1@physics.ox.ac.uk Tata Institute of Fundamental Research

Homi Bhabha Road Mumbai 400005 India

2006-02-13T11:00:00 2006-02-13T11:20:00 00:20 SAMGrid presently relies on the centralized database for providing several services vital for the system operation. These services are all encapsulated in the SAMGrid Database Server, and include access to file metadata and replica catalogs, dataset and processing bookkeeping, as well as the runtime support for the SAMGrid station services. Access to the centralized database and DB Servers represents a single point of failure in the system and limits its scalability. In order to address this issue, we have created a prototype of a peer-to-peer information service that allows the system to operate during times when access to the central DB is not available for any reason (e.g., network failures, scheduled downtimes, etc.), as well as to improve the system performance during times of extremely high system load when the central DB access is slow and/or has a high failure rate. Our prototype uses Distributed Hash Tables to create a fault tolerant and self-healing service. We believe that this is the first peer-to-peer information service designed to become a part of an in-use grid system. We describe here the prototype architecture and its existing and planned functionality, as well as show how it can be integrated into the SAMGrid system. We also present a study of performance of our new service under different circumstances. Our results strongly demonstrate the feasibility and usefulness of the proposed architecture. paper doc http://indico.cern.ch/images/word.png word file ppt http://indico.cern.ch/images/powerpoint.png powerpoint file pdf http://indico.cern.ch/images/pdf_small.png pdf file odt http://indico.cern.ch/images/writer.png writer file odp http://indico.cern.ch/images/impress.png presentation file ods http://indico.cern.ch/images/calc.png spreadsheet file other http://indico.cern.ch/images/file_small.png unknown type file link http://indico.cern.ch/images/link.png link poster doc http://indico.cern.ch/images/word.png word file ppt http://indico.cern.ch/images/powerpoint.png powerpoint file pdf http://indico.cern.ch/images/pdf_small.png pdf file odt http://indico.cern.ch/images/writer.png writer file odp http://indico.cern.ch/images/impress.png presentation file ods http://indico.cern.ch/images/calc.png spreadsheet file other http://indico.cern.ch/images/file_small.png unknown type file link http://indico.cern.ch/images/link.png link 2013-06-20 2013-06-21