funny "zfs send -Rv" glitch

[Lev Serebryakov]

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 I'm send'ing ZFS dataset with many FSes and snapshots from one server
to another via "zfs send -Rv zpool at to-send". Looks like, "-v" prints
header row (TIME SENT SNAPSHOT) before every new snapshot it processes.

 But if snapshot in question is very small (takes less than a second
to send?) it doesn't print DATA for this snapshot, so it looks like

TIME        SENT   SNAPSHOT
TIME        SENT   SNAPSHOT
TIME        SENT   SNAPSHOT
TIME        SENT   SNAPSHOT
TIME        SENT   SNAPSHOT
TIME        SENT   SNAPSHOT
TIME        SENT   SNAPSHOT
TIME        SENT   SNAPSHOT
23:40:35    178G
zroot/home/hosted/printnotdead at daily-2016-02-07_03.01.46--1m
23:40:36    178G
zroot/home/hosted/printnotdead at daily-2016-02-07_03.01.46--1m
TIME        SENT   SNAPSHOT
TIME        SENT   SNAPSHOT
TIME        SENT   SNAPSHOT
TIME        SENT   SNAPSHOT
TIME        SENT   SNAPSHOT
TIME        SENT   SNAPSHOT

 :)

- -- 
// Lev Serebryakov
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