The zfs holds command displays the following information: Which two statements are true?

Question

Options

• AUse zfs destroy -d pool12/data@nov to destroy the snapshot immediately.
• BAttempts to destroy the snapshot using zfs destroy pool12/data@nov will fail.
• CAttempts to destroy the pool12/data@nov snapshot will not destroy the snapshot immediately.
• DThe zfs directory -R pool12/data command will destroy the file system immediately.
• EThe defer_destroy property is set to on for the pool12/data@nov data set.
• FThe userrefs property is set to 1 (or higher) for the pool12/data@nov data set.

• A
  15% (4)
• B
  73% (19)
• C
  8% (2)
• D
  4% (1)

Explanation

• Use the zfs holds command to display a list of held snapshots. * Holding a snapshot prevents it from being destroyed (B). In addition, this feature allows a snapshot with clones to be deleted pending the removal of the last clone by using the zfs destroy -d command. Each snapshot has an associated user-reference count, which is initialized to zero. This count increases by one whenever a hold is put on a snapshot and decreases by one whenever a hold is released. # zfs holds tank/home@now NAME TAG TIMESTAMP tank/home@now keep Thu Jul 15 11:25:39 2010 * You can use the zfs release command to release a hold on a snapshot or set of snapshots. If the snapshot is released, the snapshot can be destroyed by using the zfs destroy command. * Two new properties identify snapshot hold information: The defer_destroy property is on if the snapshot has been marked for deferred destruction by using the zfs destroy -d command. Otherwise, the property is off. The userrefs property is set to the number of holds on this snapshot, also referred to as the user-

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