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Fault tolerance is the ability of a system to maintain proper operation despite failures or faults in one or more of its components. This capability is essential for high-availability, mission-critical, or even life-critical systems. Fault tolerance specifically refers to a system's capability to handle faults without any degradation or downtime.
Software fault tolerance. Software fault tolerance is the ability of computer software to continue its normal operation despite the presence of system or hardware faults. Fault-tolerant software has the ability to satisfy requirements despite failures. [ 1][ 2] Following design patterns should be combined together to make the system more fault ...
A fault-tolerant computer system can be achieved at the internal component level, at the system level (multiple machines), or site level (replication). One would normally deploy a load balancer to ensure high availability for a server cluster at the system level. In a high-availability server cluster, each individual server may attain internal ...
This shows that quantum computers can be made fault-tolerant, as an analogue to von Neumann's threshold theorem for classical computation.
In computing, triple modular redundancy, sometimes called triple-mode redundancy, [ 1] ( TMR) is a fault-tolerant form of N-modular redundancy, in which three systems perform a process and that result is processed by a majority-voting system to produce a single output. If any one of the three systems fails, the other two systems can correct and ...
Mean time to repair. Mean time to repair ( MTTR) is a basic measure of the maintainability of repairable items. It represents the average time required to repair a failed component or device. [ 1] Expressed mathematically, it is the total corrective maintenance time for failures divided by the total number of corrective maintenance actions for ...
Heartbeat (computing) In computer science, a heartbeat is a periodic signal generated by hardware or software to indicate normal operation or to synchronize other parts of a computer system. [ 1][ 2] Heartbeat mechanism is one of the common techniques in mission critical systems for providing high availability and fault tolerance of network ...
Fault Tolerant Messaging in the context of computer systems and networks, refers to a design approach and set of techniques aimed at ensuring reliable and continuous communication between components or nodes even in the presence of errors or failures. This concept is especially critical in distributed systems, where components may be ...