Which is the result of the following command? # zfs send -i dpool/sales/qrreports@qtrreport dpool/sales/qrreports@mth3qtrreport

Question

Options

• AAn error message will be sent to standard error.
• BThe dpool/sales/qrreports@qtrreport snapshot is saved to disk.
• CThe dpool/sales/qrreports@mth3qtrreport snapshot is saved to disk
• DThe difference between the First snapshot and the second snapshot will be written to disk

• A
  78% (29)
• B
  5% (2)
• C
  3% (1)
• D
  14% (5)

Explanation

Option A is correct because zfs send always writes its output to stdout, and when stdout is connected to a terminal (no pipe or redirection operator used here), ZFS detects this and refuses to dump raw binary stream data to the terminal - instead sending an error message to stderr. Options B and C are wrong because zfs send never "saves a snapshot to disk" on its own regardless of which snapshot you name; it streams data to stdout, which requires explicit redirection (> file) or piping (| zfs receive) to do anything useful. Option D is tempting because -i does compute the incremental difference between the two snapshots, but "written to disk" implies successful output - which can't happen here without redirection, and an error occurs first.

Memory tip: Think of zfs send as a garden hose - it needs something to direct the flow. No pipe or redirect (| or >) means the water has nowhere to go, and ZFS complains rather than flooding your terminal with binary garbage.

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