zfs resumable send over zerotier & mbuffer

resumable.md

send-and-forget

• use shells/fish
• pkg install -yr FreeBSD mosh hpenc tmux htop rsync mbuffer

# destination
# hpenc psk
Random key: h7gp...
# set PSK=h7gp...
# mbuffer -4 -s 128k -m 1G -I 9000 \
  | hpenc -d -b 16M -k $PSK  \
  | zfs recv -Fuvs zroot

# source
# zfs snapshot -r zroot@migrate
# zfs send -LevcpDR zroot@migrate \
  | hpenc -b 16M -k $PSK \
  | mbuffer -4 -s 128k -m 1G -O 123.45.67.89:9000

with resumable streams

NB this is a bit messy if you have a failure during a -R as you need to clean up the descendant filesystems manually. Too messy for my liking.

on sink side

while true
    mbuffer -4 -s 128k -m 1G -I 9000 \
        | zfs recv -Fuvs zroot/shared/got 
end

on source side

while true
    sudo zfs send -LevcpDR zroot@snap \
        (ssh -p 2200 root@10.144.157.90 zfs get -Hpo value receive_resume_token zroot/shared/got) \
        | mbuffer -4 -s 128k -m 1G -O 10.144.157.90:9000  
end

next time remember to use security/hpenc as well and the new "keep it compressed in transit" flags