STORAGE DEVICES

Author: CALDERON MATEOS ALEJANDRO.
Year: 2004.
University: CARLOS III DE MADRID [www.uc3m.es].
Place of defense: ESCUELA POLITECNICA SUPERIOR.
Place of preparation: UNIVERSIDAD CALOS III DE MADRID.

Summary: This thesis presents a proposal for a model of fault tolerance for parallel file systems that enables the delivery of fault tolerance level file. The main contributions of the thesis are: "A model of fault tolerance for parallel file systems that can apply different support fault tolerance to each file." Formalization based on patterns of distribution which allows for a flexible and simple description of the model for fault tolerance. "A survey of the main properties of the distribution patterns given by the patterns of distribution partners and defined within the model proposed fault tolerance." Algorithms necessary to add, remove or modify a dynamic model of fault tolerance a file. "The presentation of distribution patterns based on external redundancy, which allow adding and removing support fault tolerance to a file without that support simplest form." Extending the POSIX interface to be able to add, remove, change and define a pattern of distribution. It is also proposed how to perform these actions with the interface MPI-IO. There has been an evolution of the model defined, which has made a partial implementation of the model in the filesystem Expand parallel. This assessment shows that although there is a natural overload when working with files with support for fault tolerance, such overhead is not high, providing a simple and practical solution for users of a parallel file system.

Author: LARRUCEA URIARTE XABIER.
Year: 2006.
University: PAÍS VASCO [www.ehu.es].
Place of defense: FACULTAD DE INFORMATICA.

Summary: The business processes are a key element in defining the business logic because it helps to explain, among other things, specific action. Many of these organizations are adopting techniques and modeling tools to describe their business processes. The modeling of these processes provides mechanisms to represent organizational, structural and functional enterprise. However, there are different languages modeling of this type of processes leading to various kinds of problems where different organizational units claim to define and share different processes. These types of problems - type semantics syntactic, and causes various problems of interoperability at the level of business. Taking into account these issues, the most important contributions of the thesis are: Extending UML 2.0 for the definition of service-oriented architectures describing aspects of the service, process, information and quality of service. Definition and implementation of a metamodel for the design of service-oriented architectures. Definition and implementation of an integrated architecture to derive systematically from service-oriented architecture business processes. Definition and implementation of a metamodel to define patterns of software and business process and its connection to the integrated architecture.