TY - BOOK A1 - Dünnweber, Jan A1 - Gorlatch, Sergei T1 - Higher-Order Components for Grid Programming BT - Making Grids More Usable N2 - A major challenge in grid computing remains the application software development for this new kind of infrastructure. Grid application programmers have to take into account several complicated aspects: distribution of data and computations, parallel computations on different sites and processors, heterogeneity of the involved computers, load balancing, etc. Grid programmers thus demand novel programming methodologies that abstract over such technical details while preserving the beneficial features of modern grid middleware. For this purpose, the authors introduce Higher-Order Components (HOCs). HOCs implement generic parallel/distributed processing patterns, together with the required middleware support, and they are offered to users via a high-level service interface. Users only have to provide the application-specific pieces of their programs as parameters, while low-level implementation details, such as the transfer of data across the grid, are handled by the HOCs. HOCs were developed within the CoreGRID European Network of Excellence and have become an optional extension of the popular Globus middleware. The book provides the reader with hands-on experience, describing a broad collection of example applications from various fields of science and engineering, including biology, physics, etc. The Java code for these examples is provided online, complementing the book. The expected application performance is studied and reported for extensive performance experiments on different testbeds, including grids with worldwide distribution. The book is targeted at graduate students, advanced professionals, and researchers in both academia and industry. Readers can raise their level of knowledge about methodologies for programming contemporary parallel and distributed systems, and, furthermore, they can gain practical experience in using distributed software. Practical examples show how the complementary online material can easily be adopted in various new projects. KW - Component-Based Development KW - Distributed Computing KW - Distributed Resource Management KW - Globus KW - Grid and Cloud Computing KW - Java KW - Middleware KW - Web Services KW - distributed systems KW - grid computing KW - load balancing KW - programming Y1 - 2009 SN - 978-3-642-00841-2 U6 - https://doi.org/10.1007/978-3-642-00841-2 PB - Springer CY - Berlin, Heidelberg ER - TY - CHAP A1 - Dünnweber, Jan A1 - Aldinucci, Marco A1 - Gorlatch, Sergei A1 - Campa, Sonia A1 - Danelutto, Marco ED - Gorlatch, Sergei ED - Danelutto, Marco T1 - Adaptable Parallel Components for Grid Programming T2 - Integrated Research in GRID Computing N2 - We suggest that parallel software components used for grid computing should be adaptable to application-specific requirements, instead of developing new components from scratch for each particular application. As an example, we take a parallel farm component which is “embarrassingly parallel”, i. e., free of dependencies, and adapt it to the wavefront processing pattern with dependencies that impact its behavior. We describe our approach in the context of Higher-Order Components (HOCs), with the Java-based system Lithium as our implementation framework. The adaptation process relies on HOCs’ mobile code parameters that are shipped over the network of the grid. We describe our implementation of the proposed component adaptation method and report first experimental results for a particular grid application — the alignment of DNA sequence pairs, a popular, time-critical problem in computational molecular biology. KW - Grid Components KW - Adaptable Code KW - Wavefront Parallelism KW - Java KW - Web Services Y1 - 2006 SN - 978-0-387-47656-8 U6 - https://doi.org/10.1007/978-0-387-47658-2_4 SP - 43 EP - 57 PB - Springer Verlag CY - Boston, MA ER -