Need a copy of that file you deleted last Tuesday? No problem. Imagine taking a snapshot of your home directory at the beginning of the work day, and perhaps another one after lunch.
This is a powerful feature as there are many scenarios where it is convenient to access files from a certain point in time. What exactly is a snapshot? zfs(8) defines it as a “ Read-only version of a file system … at a given point in time”.
Since snapshots are atomic, they are not affected by other processes and you don’t have to stop any running applications before taking a snapshot. Snapshots complement a backup strategy, as they are instantaneous and don’t require a backup window. OpenZFS stands out in its snapshot design, providing powerful and easy-to-use tools for managing snapshots.
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