A large enterprise with critical uptime requirements needs to implement a feature in their file system to help maintain a consistent state of their files post any system crashes. Which of the following would BEST ensure that file changes are systematically recorded, facilitating a quick restoration of the last known good state after a crash?
Utilizing RAID configurations for data redundancy
Relying on routine snapshots of the data
Enforcing strict file permissions
Implementing a file system with journaling capabilities
Journaling in the context of file systems is used to record changes not yet committed to the file system, which can protect against corruption and ensure the file system can be reliably restored to a good state in the event of a crash. This feature is specifically designed to track changes in a sequential log, providing a mechanism for recovery that does not depend on the file system's regular write processes, which might be incomplete at the time of a crash.
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What is a journaling file system?
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How does journaling differ from using RAID configurations for data protection?
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Can journaling completely prevent data loss in a crash?