We introduce a new recovery scheme that needs only one extra backup routing table for networks employing shortest-path routing. By precomputing this backup table, the network recovers from any single link failure immediately after the failure occurs. To compute the backup routing table for this scheme, we use an almost linear time algorithm to solve the {r, v}-problem, which is a variation of t...

Imagine having to prove everything you believe at one time. That is exactly what happened when I was asked to change the design of an Enterprise Backup System to accommodate the backup and restore needs of a new, very large system. To meet the challenge, I’d have to use three brand-new pieces of technology and push my chosen backup software to its limits. Would I be able to send that much data ...

The use of mobile devices expands to various services, notably multimedia applications, resulting in huge quantity of data generated. The traditional backup function is relying entirely on the sporadic connection of the mobile device to an infrastructure. This is not sufficient to backup all the critical data handled by the mobile device. We propose a new alternative for the backup that relies ...

This research introduces a new approach to modeling wireless network reliability under diverse fault assumptions. It allows for quantifying reliability and offers potential for modeling survivability. The general model is presented as a join graph of cliques, that allows for horizontal and orthogonal cross-monitoring. This allows for the determination of the maximal potential fault tolerance. T...

Rapidly increasing volume of traffic carried by the Internet together with imposing requirements for reliability, quality of service (QoS) and manageability, force the network technology designers to come up with new approaches and solutions. As the Internet moves towards an IP over WDM model, existing means of network engineering to provide assured bandwidth, quality of service and fault toler...

Application Level Multicast is a promising approach to overcome the deployment problems of IP level multicast by establishing delivery trees using overlay links among end systems. This paper presents algorithms to support traffic engineering, to improve the reliability of multicast delivery, and to facilitate secure group communications. First, we introduce the so-called backup multicast tree a...

Prior to the widespread adoption of intracoronary stent implantation, potential complications of percutaneous coronary intervention (PCI) necessitated the presence of backup cardiac surgery. However, as stent implantation has become the predominant form of PCI, the incidence of emergent cardiac surgery has declined exponentially. Despite this, current guidelines recommend against the performanc...

The emergence of cloud computing has enabled users to store and manage data at a low cost and high availability, which made outsourcing data become appealing to its customers. Since the inception of cloud computing, efforts have been dedicated to improve the security and performance of cloudbased backup services. However, there is yet to be implemented a complete scheme that provides security, ...

The advent of inexpensive multi-gigabyte tape drives has made possible the completely automated backup of many dozens of networked workstations to a single tape. One pioblem that arises with this scheme is that many computers cannot backup theiì disks óver the network at more than a f¡action of the tape's rated speed. Thus, running overnight backups sequentially can take well into the next day....

To address the increasingly important energy efficiency problem, a Standby-Sparing scheme has been studied previously to reduce the energy consumption in dual-processor fault-tolerant systems. However, the dedicated (spare) processor in the Standby-Sparing scheme needs to execute backup tasks at full speed to preserve system reliability and thus cannot effectively exploit its available slack ti...