Disaster recovery planning and securing business processes against outtakes have been essential parts of running a company for decades. As IT systems became more important, and especially since more and more revenue is generated over the Internet, securing the IT systems that support the business processes against outages is essential. Using fully operational standby sites with periodically upd...

We introduce a robot-safety device system attended by two di erent repairmen. The twin system is characterized by the natural feature of cold standby and by an admissible “risky” state. In order to analyse the random behaviour of the entire system (robot, safety device, repair facility), we employ a stochastic process endowed with probability measures satisfying general steady-state di erential...

This paper investigated the stochastic analysis of twodissimilar unit cold standby system considering repair, inspection, post repair under Poisson shocks. The serverman, is called when the operative unit fails. The shocks can attack the operative unit. The repaired unit is sent for inspection to decide whether the repair is satisfactory. If the repair is found unsatisfactory, then the unit is ...

This paper presents a new mathematical model for a redundancyallocation problem (RAP) withcold-standby redundancy strategy and multiple component choices.The applications of the proposed model arecommon in electrical power, transformation,telecommunication systems,etc.Manystudies have concentrated onone type of time-to-failure, butin thispaper, two components of time-to-failures which follow hy...

This paper is devoted to researching the routing reliability and router standby mechanism for smart and cooperation network. The method of updating and initiating the standby router has been also provided. With the aid of virtual interface, both the main router and standby router will be transparent to the network. Through Mini-Net simulated experiment, this paper has verified the mechanism. It...

In this paper the two identical unit cold standby systems with single repairman has been discussed.The concept of inspection policy has also been introduced for detecting the kind of failures (major or minor) before the failed unit get repaired by some repair mechanism.The model has been design for the system to calculate the various important measures of reliability i.e MTSF, steady state avai...

We consider the MAP/M/c queue with markovian flow of breakdowns. There are K waiting positions for arrival customers in the system. The system we consider comprises c servers, of which one are has to work for the customers. The other servers is in the cold standby , repairing or waiting for repairing, only the working server can fails, and there is only one repairman. This model is quite genera...

We consider a two-unit cold standby system attended by two repairmen and subjected to a priority rule. In order to describe the random behavior of the twin system, we employ a stochastic process endowed with state probability functions satisfying coupled Hokstadtype differential equations. An explicit evaluation of the exact solution is in general quite intricate. Therefore, we propose a numeri...

High availability (HA) is critical for many stream processing applications such as financial data analysis and disaster response. Existing HA schemes use either active standby or passive standby to guard the system against unexpected failures such as machine crash. Despite previous efforts of simulation-based studies that report active standby is superior, there is a lack of in-depth understand...