In this research, a mathematics model is proposed to describe the mission availability for bounded-cumulative-downtime system. In the proposed model, the cumulative downtime and cumulative uptime are considered as constraints simultaneously. The mission availability can be defined as the probability that all repairs do not exceed the bounded cumulative downtime constraint of such system before ...

Multiprotocol Label Switching (MPLS) systems are used in core networks where system downtime must be kept to a minimum. Similarly, where MPLS is at the network edges (e.g., in Provider Edge (PE) routers) [RFC2547], system downtime must also be kept to a minimum. Many MPLS Label Switching Routers (LSRs) may, therefore, exploit Fault Tolerant (FT) hardware or software to provide high availability...

It is widely understood that most downtime is accounted for by programming errors and administration time. However, recent work has indicated an increasing cause of downtime may stem from transient hardware errors caused by external factors, such as cosmic rays. Moving to denser semiconductor technologies at lower voltages will cause an increase in transient errors. We investigate the trends in...

38 Computer P u b l i s h e d b y t h e I E E E C o m p u t e r S o c i e t y puters too unreliable for application scientists to use. Unfortunately, building exotic cooling facilities can cost as much as the supercomputer itself, and operating and maintaining the facilities costs even more. As “The Energy-Efficient Green Destiny” sidebar details, the low-power supercomputer that we developed w...