Security

Causality-Based Versioning

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Executive Summary

Versioning file systems provide the ability to recover from a variety of failures, including file corruption, virus and worm infestations, and user mistakes. However, using versions to recover from data-corrupting events requires a human to determine precisely which files and versions to restore. The authors can create more meaningful versions and enhance the value of those versions by capturing the causal connections among files, facilitating selection and recovery of precisely the right versions after data corrupting events. They determine when to create new versions of files automatically using the causal relationships among files.

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