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Author

  • Röblitz, Thomas (14)
  • Dierkes, Thomas (5)
  • Reinefeld, Alexander (5)
  • Röblitz, Susanna (5)
  • Schintke, Florian (5)
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  • In Proceedings (13)
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  • English (19)

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  • Reservierung (1)
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  • affine invariant Gauss-Newton algorithm (1)
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Institute

  • Distributed Algorithms and Supercomputing (14)
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AstroGrid-D: Enhancing Astronomic Science with Grid Technology (2007)
Enke, Harry ; Steinmetz, Matthias ; Radke, Thomas ; Reiser, Angelika ; Röblitz, Thomas ; Högqvist, Mikael
Providing Remote Access to Robotic Telescopes by Adopting Grid Technology (2007)
Granzer, Thomas ; Breitling, Frank ; Braun, Michael ; Enke, Harry ; Röblitz, Thomas
BioPARKIN - Biology-related Parameter Identification in Large Kinetic Networks (2011)
Dierkes, Thomas ; Wade, Moritz ; Nowak, Ulrich ; Röblitz, Susanna
Modelling, parameter identification, and simulation play an important rôle in Systems Biology. In recent years, various software packages have been established for scientific use in both licencing types, open source as well as commercial. Many of these codes are based on inefficient and mathematically outdated algorithms. By introducing the package BioPARKIN recently developed at ZIB, we want to improve this situation significantly. The development of the software BioPARKIN involves long standing mathematical ideas that, however, have not yet entered the field of Systems Biology, as well as new ideas and tools that are particularly important for the analysis of the dynamics of biological networks. BioPARKIN originates from the package PARKIN, written by P.Deuflhard and U.Nowak, that has been applied successfully for parameter identification in physical chemistry for many years.
Co-Reservation of Resources in the Grid (2009)
Röblitz, Thomas
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.
Parameter identification in large kinetic networks with BioPARKIN (2013)
Dierkes, Thomas ; Röblitz, Susanna ; Wade, Moritz ; Deuflhard, Peter
An Efficient Protocol for Reserving Multiple Grid Resources in Advance (2008)
Schneider, Jörg ; Gehr, Julius ; Linnert, Barry ; Röblitz, Thomas
Global Optimization for Scheduling Multiple Co-Reservations in the Grid (2008)
Röblitz, Thomas
Specifying and Processing Co-Reservations in the Grid (2008)
Röblitz, Thomas
Co-reservation with the concept of virtual resources (2005)
Röblitz, Thomas ; Reinefeld, Alexander
Stellaris: An RDF-based Information Service for AstroGrid-D (2007)
Högqvist, Mikael ; Röblitz, Thomas ; Reinefeld, Alexander
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