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?
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 exactly is journaling in file systems?
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How does journaling help in recovering from a crash?
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What are some examples of file systems that support journaling?