Fault Tolerant Environment in Web Crawler Using Hardware Failure Detection

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Executive Summary

Fault Tolerant Environment is a complete programming environment for the reliable execution of distributed application programs. Fault Tolerant Distributed Environment encompasses all aspects of modern fault-tolerant distributed computing. The built-in user-transparent error detection mechanism covers processor node crashes and hardware transient failures. The mechanism also integrates user-assisted error checks into the system failure model. The nucleus non-blocking check-pointing mechanism combined with a novel low overhead roll forward recovery scheme delivers an efficient, low-overload backup and recovery mechanism for distributed processes.

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