---+ <nop>GREDIA: Grid enabled access to rich media content ---++ Overview [[http://www.gredia.eu][GREDIA]] is an FP6 project funded by the European Union. Our team, as technical coordinators and Grid technology experts, is developing a generic middleware platform, based on our proposed service-oriented architecture, _RDLS_ (Rich Data Location Services) , which enables efficient content management in Grid environments. Our design introduces concepts from Peer-to-Peer and distributed computing in order to provide a scalable and reliable infrastructure for storage, search and retrieval of annotated multimedia content. To ensure fast media lookups in the distributed repositories of a Virtual Organization, our system incorporates a _multidimensional indexing_ scheme, which serves the need for supporting both _point and range queries_ over a set of meta-data attributes. The distributed index is built on top of XOROS, a DHT that supports mutable objects. What is more, we are using Space Filling Curves ( [[http://en.wikipedia.org/wiki/Space-filling_curve][SFCs]]) to deal with arbitrary multi-attribute queries. File transfers are conducted using GridTorrent, a grid-enabled, Peer-to-Peer mechanism that allows the aggregate data transfer throughput to scale, effectively coping with flash crowds. _RDLS_ can be efficiently integrated in existing Grid middlewares, such as [[http://www.globus.org/][Globus Toolkit 4]], as it complies with WSRF, a standard posed by the [[http://www.gridforum.org/][Open Grid Forum]]. GridTorrent has backward compatibility with the file transfer utility [[http://www.globus.org/toolkit/docs/4.0/data/gridftp/][GridFTP]], adopted by the Grid community. ---++ People * [[http://www.cslab.ntua.gr/%7Edtsouma/][Dimitrios Tsoumakos]] * [[http://www.cslab.ntua.gr/%7Eaassiki/][Athanasia Asiki]] * [[http://www.cslab.ntua.gr/%7Edoka/][Katerina Doka]] * [[http://www.cslab.ntua.gr/%7Eazisi/][Antonis Zissimos]] * [[http://www.cslab.ntua.gr/%7Eikons/][Ioannis Konstantinou]] ---++ Publications * A. Asiki, K. Doka, I. Konstantinou, A. Zissimos and N. Koziris, *"A Distributed Architecture for Multi-dimensional Indexing and Data Retrieval in Grid Environments"*. _In Proceedings of the Cracow 07 Grid Workshop_, Cracow, Poland, October 2007
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