The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Complex scientific workflows are now commonly executed on global grids. With the increasing scale complexity, heterogeneity and dynamism of grid environments the challenges of managing and scheduling these workflows are augmented by dependability issues due to the inherent unreliable nature of large-scale grid infrastructure. In addition to the traditional fault tolerance techniques, specific checkpoint-recovery...
Scheduling independent tasks in Computational Grids commonly arises in many Grid-enabled large scale applications. Much of current research in this domain is focused on the improvement of the efficiency of the Grid schedulers, both at global and local levels, which is the basis for Grid systems to leverage large computing capacities. However, unlike traditional scheduling, in Grid systems security...
Resource planning and scheduling for a given job is a central issue in the scientific problem solving Grid oriented environments. The workflow oriented approach to this issue has the advantage of efficient allocation of resources at the workflow level by revising the allocation solution at the task level based on requirements of subsequent tasks. The PEGAF project aims at providing a platform for...
One of the most important management aspects in Grid systems is task scheduling. This component should try to achieve two main objectives: efficient use of available resources and high performance in solving tasks given by members of virtual organizations. The scheduling problem is one of the hardest problems and it is proved that it is an NP-Complete problem. In order to have good performances heuristic...
Scheduling of tasks takes into account the priority of the tasks and the available laxity among other factors. Laxity is a measure of slack time. Generally, the available slack time is cumulated and uniformly distributed among all tasks, irrespective of priority. However, a better approach would be to distribute the slack time to tasks in proportion to their priority, giving rise to non-uniform laxity...
In grid and parallel systems, backfilling has proven to be a very efficient method when parallel jobs are considered. However, it requires a job's runtime to be known in advance, which is not realistic with current technology. Various prediction methods do exist, but none is very accurate. In this study, we examine a grid system where both parallel and sequential jobs require service. Backfilling...
Recently many countries have kept studying on the methods of constructing ultra speed networks. Task Force team for IEEE 802.3ah has accomplished the standardization of EPON which is the next generation subscriber access network. EPON doesn't still have the bandwidth wide enough to support the new service which demands high bandwidth. Therefore 10 G EPON is the next generation subscriber access network...
In public display systems determine what to present and when is a central feature. Although several adaptive scheduling alternatives have been explored, which introduce sensibility of the display to some type of external variable, they are still very dependent on the user in their behavior, content specific in their nature and very rigid in their adaptation to their social environment, not providing...
Summary form only given. Scheduling and resource management in complex heterogeneous distributed systems, such grids, became more important due to the increase of users and applications. Computational and data grids are the most common grid types. In this talk we focus on computational grids, which are used for serving demanding and complex tasks. Because of the nature of grids, there are important...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.