For some real-time applications, it is necessary to provide a fast switch over to the backup connection whenever the primary connection fails. With the increase in reliability of network links, it is more cost effective if the backup resources are shared among a number of connections. However, the sharing of backup resources must be controlled to ensure the users of high availability of the bac...

Routing protocols in Mobile Ad-Hoc Networks need to accommodate its dynamic characteristics such as node mobility, non-availability of central control etc. Node mobility increase challenges to the routing protocols with respect to attainment of the desired level of Quality of services. Apart from own communication, MANET nodes have to participate in packets forwarding to other nodes. Node coope...

The progressive integration of processor and memory has unexpected implications for the design of DSM systems. To exploit this integration best, we claim that we need to redesign the nodes of DSM systems and then reorganize the whole machine. In this paper, we propose a new DSM organization where processor nodes have their on-chip memories conngured as caches and their directory controllers hav...

background: the purpose of this study was to evaluate nodal irradiation with conventional three-field's technique. materials and methods: fifty patients with breast cancer were enrolled in this study. computed tomography scans in the supine treatment position were imported into a treatment planning system. levels i-iii axillary and supraclavicular nodes were identified and their depths to ...

The ever-growing volume and value of data has raised increasing pressure for long-term data protection in storage systems. Moreover, the redundancy in data further aggravates such pressure in these systems. It has become a serious problem to protect data while eliminating data redundancy, saving storage space and network bandwidth as well. Data deduplication techniques greatly optimize storage ...

In a remote backup system, transaction processing takes place at the primary and the log records generated at the primary are propagated to the remote backup which uses them to reconstruct a recent state of the database at the primary. In the event of a primary failure, the backup system takes over transaction processing without causing users to observe a breach in service. Existing remote back...

In MPLS networks, failure resilience of a Label Switched Path (LSP) is essential in guaranteeing the QoS of the path. This can be achieved by allocating backup LSPs through which packets can be routed in case of primary LSP failiures. bandwidth efficiency and expeditious path restoration are two desirable features for the design of backup LSPs. This paper tackles the bandwidth efficiency with a...

We consider a network of computers consisting of file servers and a Database Management System (DBMS) where a linkage is maintained, with referential integrity, between data in the DBMS and files in the file servers which are external to the DBMS. We present algorithms for performing backup and recovery of the DBMS data in a coordinated fashion with the files on the file servers. When a file is...

One of the most fundamental elements of any disaster recovery plan is data backup and recovery. If an IT staff lacks the ability to recover lost data following an incident or disaster, redundant hardware or hot sites are of only limited value. Relatively few years ago, planning a backup strategy was reasonably straightforward for the small-office-home-office (SOHO) and small-tomedium-sized-busi...