Resource redundancy is a primary way to improve availability for applications in computational grid. How to select backup resources for an application during the resource allocation phase and how to make advanced reservation for backup resources are challenging issues for grid environment to provide high availability service. In this paper, we proposed a backup resources selection algorithm bas...

This paper considers the following backup scheme for a database system: a database is updated at a nonhomogeneous Poisson process and an amount of updated files accumulates additively. To ensure the safety of data, full backup are performed at time NT=L or when the database fails, whichever occurs first, and between them, incremental backups are made at periodic times iT (i=1, 2, ..., N-1) so a...

In view of the European Union’s strategy on hydrogen for decarbonization and buildings’ targets, use in buildings is expected future. Backup power usually provided with diesel generators (DGs). this study, a fuel cell (HFC) supply backup system studied. Its operation compared to DG techno-economic analysis latter’s replacement an HFC conducted by calculating relevant key performance indicators ...

In the emerging next-generation transport networks, called intelligent optical transport networks, DWDM-based optical components like add-drop multiplexers and optical cross connects will have full knowledge of the wavelengths in the network, status, and traffic carrying capacity of each wavelength. With such intelligence, these intelligent optical networks could create self-connecting and self...

Periodic data backup is a system administration requirement that has changed as wireless machines have altered the fundamental structure of networks. These changes necessitate a complete rethinking of modern network backup strategies. The approaches of the 1980’s and 1990’s are no longer sufficient and must be updated. In addition to standard backup programs from vendors, specialized system adm...

This paper proposes a new backup protection scheme, named coordinated backup protection (CBP) scheme, for distribution networks containing distributed generation. The proposed protection scheme takes into account the issues faced by traditional backup protection, such as difficulty in setting parameters and complex cooperation, and considers the features of distribution networks, such as change...

Cloud computing promises high performance and cost-efficiency. However, most cloud infrastructures operate at a low utilization, which greatly adheres cost effectiveness. Previous works focus on seeking efficient virtual machine (VM) consolidation strategies to increase the utilization of virtual resources in production environment, but overlook the under-utilization of backup virtual resources...

We consider a label switched network in which backup paths are provided using a local restoration scheme [1], [2]. A node receives a failure notification if either an adjacent link or a neighboring node fails. Such a node, however, cannot distinguish between link and node failures and must do one of two things. 1) Activate backup paths corresponding to both the link and the node suspected to ha...

We survey two schemes for fault tolerance for diierent fault models. The rst, primary-backup approach deals with disaster recovery. The second, is aimed at developing commit protocols that tolerate commission failures. A remote backup database system tracks the state of a primary system, taking over transaction processing when disaster hits the primary site. The primary and backup sites are phy...