Journaling is a feature of some file systems that keeps track of changes not yet committed to the file system's main part by recording the intentions of such changes in a data structure known as a journal. In the event of a system crash or power failure, such file systems can be restored more quickly with consistency due to this record of intentions.
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What are some examples of file systems that use journaling?
How does journaling improve data recovery after a crash?
What is the difference between journaling and non-journaling file systems?