Annotation of wikisrc/projects/project/tmpfs-snapshot.mdwn, revision 1.1

1.1     ! jmmv        1: [[!template id=project
        !             2: 
        !             3: title="Add snapshots to tmpfs"
        !             4: 
        !             5: contact="""
        !             6: [tech-kern](mailto:tech-kern@NetBSD.org)
        !             7: """
        !             8: 
        !             9: category="filesystems"
        !            10: difficulty=""
        !            11: 
        !            12: description="""
        !            13: Add memory-efficient snapshots to tmpfs.  A snapshot is a view of the
        !            14: filesystem, frozen at a particular point in time.  The snapshotted filesystem is
        !            15: not frozen, only the view is.  That is, you can continue to
        !            16: read/write/create/delete files in the snapshotted filesystem.
        !            17: 
        !            18: The interface to snapshots may resemble the interface to null mounts, e.g.,
        !            19: 'mount -t snapshot /var/db /db-snapshot' makes a snapshot of /var/db/ at
        !            20: /db-snapshot/.
        !            21: 
        !            22: You should exploit features of the virtual memory system like copy-on-write
        !            23: memory pages to lazily make copies of files that appear both in a live tmpfs and
        !            24: a snapshot.  This will help conserve memory.
        !            25: """
        !            26: ]]

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