@inproceedings{GranzerBreitlingBraunetal.2007, author = {Granzer, Thomas and Breitling, Frank and Braun, Michael and Enke, Harry and R{\"o}blitz, Thomas}, title = {Providing Remote Access to Robotic Telescopes by Adopting Grid Technology}, series = {German e-Science Conference}, booktitle = {German e-Science Conference}, publisher = {Max Planck Digital Library}, year = {2007}, language = {en} } @inproceedings{EnkeSteinmetzRadkeetal.2007, author = {Enke, Harry and Steinmetz, Matthias and Radke, Thomas and Reiser, Angelika and R{\"o}blitz, Thomas and H{\"o}gqvist, Mikael}, title = {AstroGrid-D: Enhancing Astronomic Science with Grid Technology}, series = {German e-Science Conference}, booktitle = {German e-Science Conference}, publisher = {Max Planck Digital Library}, year = {2007}, language = {en} } @phdthesis{Roeblitz, author = {R{\"o}blitz, Thomas}, title = {Co-Reservation of Resources in the Grid}, isbn = {978-3-86853-137-4}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-11626}, abstract = {Executing applications in the Grid often requires access to multiple geographically distributed resources. In a Grid environment, these resources belong to different administrative domains, each employing its own scheduling policy. That is, at which time an activity (e.g., compute job, data transfer) is started, is decided by the resource's local management system. In such an environment, the coordinated execution of distributed applications requires guarantees on the quality of service (QoS) of the needed resources. Reserving resources in advance is an accepted means to obtain QoS guarantees from a single provider. The challenge, however, is to coordinate advance reservations of multiple resources. This work presents a system architecture and mechanisms to coordinate multiple advance reservations -- called co-reservations -- for delivering QoS guarantees to complex applications. We formally define the co-reservation problem as an optimization problem. The presented model supports three dimensions of freedom: the start time, the duration and the service level of a reservation. Requests and resources are described in a simple language. After matching the static properties and requirements of either side in a mapping, the reservation mechanism probes information about the future status of the resources. The versatile design of the probing step allows the efficient processing of requests, but also lets the resources express their preferences among the myriads of reservation candidates. Next, the best mapping is found through an implementation of the formal co-reservation model. Then, the mapping has to be secured, i.e., resources need to be allocated to a co-reservation candidate with all-or-nothing semantics. We study several goal-driven sequential and concurrent allocation mechanisms and define schemes for handling allocation failures. Finally, we introduce the concept of virtual resources for seamlessly embedding co-reservations into Grid resource management.}, language = {en} } @inproceedings{SchneiderGehrLinnertetal.2008, author = {Schneider, J{\"o}rg and Gehr, Julius and Linnert, Barry and R{\"o}blitz, Thomas}, title = {An Efficient Protocol for Reserving Multiple Grid Resources in Advance}, series = {Proceedings of the 3\$^rd\$ CoreGRID Workshop on Grid Middleware}, booktitle = {Proceedings of the 3\$^rd\$ CoreGRID Workshop on Grid Middleware}, address = {Barcelona, Spain}, year = {2008}, language = {en} } @inproceedings{Roeblitz2008, author = {R{\"o}blitz, Thomas}, title = {Specifying and Processing Co-Reservations in the Grid}, series = {Proceedings of the 9\$^th\$ Workshop on Parallel Systems and Algorithms}, booktitle = {Proceedings of the 9\$^th\$ Workshop on Parallel Systems and Algorithms}, address = {Dresden, Germany}, year = {2008}, language = {en} } @inproceedings{Roeblitz2008, author = {R{\"o}blitz, Thomas}, title = {Global Optimization for Scheduling Multiple Co-Reservations in the Grid}, series = {Proceedings of the CoreGRID Symposium 2008}, booktitle = {Proceedings of the CoreGRID Symposium 2008}, address = {Las Palmas de Gran Canaria, Spain}, year = {2008}, language = {en} } @article{RoeblitzSchintkeReinefeldetal.2004, author = {R{\"o}blitz, Thomas and Schintke, Florian and Reinefeld, Alexander and B{\"a}rring, Olof and Lopez, Maite Barroso and Cancio, German and Chapeland, Sylvain and Chouikh, Karim and Cons, Lionel and Poznanski, Piotr and Defert, Philippe and Iven, Jan and Kleinwort, Thorsten and Panzer-Steindel, Bernd and Polok, Jaroslaw and Rafflin, Catherine and Silverman, Alan and Smith, Tim and van Eldik, Jan and Front, David and Biasotto, Massimo and Aiftimiei, Cristina and Ferro, Enrico and Maron, Gaetano and Chierici, Andrea and dell'Agnello, Luca and Serra, Marco and Michelotto, Michele and Hess, Lord and Lindenstruth, Volker and Pister, Frank and Steinbeck, Timm and Groep, David and Steenbakkers, Martijn and Koeroo, Oscar and de Cerff, Wim and Venekamp, Gerben and Anderson, Paul and Colles, Tim and Holt, Alexander and Scobie, Alastair and George, Michael and Washbrook, Andrew and Leiva, Rafael}, title = {Autonomic Management of Large Clusters and Their Integration into the Grid}, series = {J. Grid Comput.}, volume = {2}, journal = {J. Grid Comput.}, number = {3}, doi = {10.1007/s10723-004-7647-3}, pages = {247 -- 260}, year = {2004}, language = {en} } @inproceedings{RoeblitzSchintkeWendler2004, author = {R{\"o}blitz, Thomas and Schintke, Florian and Wendler, Jan}, title = {Elastic Grid Reservations with User-Defined Optimization Policies}, series = {Proceedings of the 2nd Workshop on Adaptive Grid Middleware (AGridM'04), in conjunction with PACT 2004, Antibes Juan-les-Pins, France}, booktitle = {Proceedings of the 2nd Workshop on Adaptive Grid Middleware (AGridM'04), in conjunction with PACT 2004, Antibes Juan-les-Pins, France}, year = {2004}, language = {en} } @inproceedings{RoeblitzReinefeld2005, author = {R{\"o}blitz, Thomas and Reinefeld, Alexander}, title = {Co-reservation with the concept of virtual resources}, series = {5th International Symposium on Cluster Computing and the Grid (CCGrid 2005), 9-12 May, 2005, Cardiff, UK}, booktitle = {5th International Symposium on Cluster Computing and the Grid (CCGrid 2005), 9-12 May, 2005, Cardiff, UK}, publisher = {IEEE Computer Society}, pages = {398 -- 406}, year = {2005}, language = {en} } @inproceedings{HoegqvistRoeblitzReinefeld2007, author = {H{\"o}gqvist, Mikael and R{\"o}blitz, Thomas and Reinefeld, Alexander}, title = {Stellaris: An RDF-based Information Service for AstroGrid-D}, series = {German e-Science Conference}, booktitle = {German e-Science Conference}, publisher = {Max Planck Digital Library}, year = {2007}, language = {en} }