In this paper, we propose a High Availability Open Shortest Path First (HA-OSPF) router which consists of two OSPF router modules, active and standby, to support a high availability network. First, we used the continuous-time Markov chain (CTMC) to analyze the steady-state availability of an HA-OSPF router with one active router and N standby routers (1 + N redundancy model). Then, with the fai...

in recent years due to improvements of technology within automobile industry, design process of advanced driver assistance systems for collision avoidance and traffic management has been investigated in both academics and industrial levels. detection of traffic signs is an effective method to reach the mentioned aims. in this paper a new intelligent driver assistance system based on traffic sig...

Being able to detect failures is an important issue in designing fault-tolerant distributed systems. However, the actual behaviour of a system limits the ability to provide such a mechanism. From one extreme of the spectrum, synchronous systems (i.e., with bounded message transmission delay and processing times) allow for the construction of perfect failure detection based simply on local timeo...

Bridged Ethernet and IP routing and forwarding are without any doubt the most deployed network technologies, mainly because of their robust, low-cost and easy-to-deploy-character. Solutions to provide fast recovery over these technologies are thus a highly desired feature. Fast recovery not only needs a fast switchover (e.g. using IPFastReRoute), but also requires fast failure detection. Howeve...

Failure Detection is valuable for system management, replication, load balancing, and other distributed services. To date, Failure Detection Services scale badly in the number of members that are being monitored. This paper describes a new protocol based on gossiping that does scale well and provides timely detection. We analyze the protocol, and then extend it to discover and leverage the unde...

In identifying to-be-improved product component(s), the customer/user requirements which are mainly considered, and achieved through customer surveys using the quality function deployment (QFD) tool, often fail to guarantee or cover aspects of the product reliability. Even when they do, there are always many misunderstandings. To improve the product reliability and quality during product redesi...

KHARBAS, KISHOR H. Failure Detection and Partial Redundancy in HPC. (Under the direction of Dr. Frank Mueller.) To support the ever increasing demand of scientific computations, today’s High Performance Computing (HPC) systems have large numbers of computing elements running in parallel. Petascale computers, which are capable of reaching a performance in excess of one PetaFLOPS (1015 floating p...

Certain gateways (e.g., some cable or DSL modems) are known to have low reliability and low availability. Most failures of these devices can however be “fixed” by rejuvenating the device after a failure has been detected. Such a detection based rejuvenation strategy permits increasing the availability of these gateways. In the considered scenario, rejuvenation is non-trivial since a failure of ...

The implementation of appropriate statistical techniques for monitoring conditional VaR models, i.e, backtesting, reported by institutions is fundamental to determine their exposure to market risk. Backtesting techniques are important since the severity of the departures of the VaR model from market results determine the penalties imposed for inadequate VaR models. In this paper we make six con...