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@@ -50,7 +50,7 @@ display snapshots names for a file. This argument optionally takes a value. By d
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prune all snapshot/s which contain the input file/s on that file's most immediate mount via "zfs destroy". "zfs destroy" is a DESTRUCTIVE operation which *does not* only apply to the file in question, but the entire snapshot upon which it resides. Careless use may cause you to lose snapshot data you care about. This argument requires and will be filtered according to any values specified at LIST_SNAPS. User may also enable SELECT mode to make a granular selection of specific snapshots to prune. Note: This is a ZFS only option.
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.TP
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\fB\-\-roll\-forward=\fR<ROLL_FORWARD>
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traditionally 'zfs rollback' is a destructive operation, whereas httm roll\-forward is non\-destructive. httm will copy only files and their attributes that have changed since a specified snapshot, from that snapshot, to its live dataset. httm will also take two precautionary snapshots, one before and one after the copy. Should the roll forward fail for any reason, httm will roll back to the pre\-execution state. Caveats: This is a ZFS only option which requires super user privileges.
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traditionally 'zfs rollback' is a destructive operation, whereas httm roll\-forward is non\-destructive. httm will copy only files and their attributes that have changed since a specified snapshot, from that snapshot, to its live dataset. httm will also take two precautionary snapshots, one before and one after the copy. Should the roll forward fail for any reason, httm will roll back to the pre\-execution state. Caveats: This is a ZFS only option which requires super user privileges. Not all filesystem features are supported (for instance, Solaris door or sockets on the snapshot) and will cause a roll forward to fail. Certain special/files objects will be copied or recreated, but are not guaranteed to be in the same state as the snapshot (for instance, fifos).The block clone copying so many file in parallel may also cause a kernel crash on some configurations, and is therefore disabled in this mode.
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.TP
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\fB\-m\fR, \fB\-\-file\-mount[=\fR<FILE_MOUNT>]
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by default, display the all mount point/s of all dataset/s which contain/s the input file/s. This argument optionally takes a value to display other information about the path. Possible values are: "mount" or "target" or "directory", return the directory upon which the underlying dataset or device of the mount, "source" or "device" or "dataset", return the underlying dataset/device of the mount, and, "relative\-path" or "relative", return the path relative to the underlying dataset/device of the mount. [aliases: mount] [possible values: source, target, mount, directory, device, dataset, relative\-path, relative, relpath]
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