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Support mbuffer for smoother transfers #112

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Support mbuffer for smoother transfers #112

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21 changes: 13 additions & 8 deletions bin/snap-sync
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Original file line number Diff line number Diff line change
Expand Up @@ -48,10 +48,15 @@ if [[ $? -ne 0 ]]; then
donotify=1
fi

doprogress=0
which pv &> /dev/null
if [[ $? -ne 0 ]]; then
doprogress=1
unset doprogress
which mbuffer &> /dev/null
if [[ $? -eq 0 ]]; then
doprogress="mbuffer -m 1G -v 3"
else
which pv &> /dev/null
if [[ $? -eq 0 ]]; then
doprogress=pv
fi
fi

error() {
Expand Down Expand Up @@ -465,8 +470,8 @@ for x in $selected_configs; do

if [[ -z "$old_num" ]]; then
printf "Sending first snapshot for '%s' configuration...\n" "$x" | tee $PIPE
if [[ $doprogress -eq 0 ]]; then
btrfs send "$new_snap" | pv | $ssh btrfs receive "$backup_location" &>/dev/null
if [[ -v doprogress ]]; then
btrfs send "$new_snap" | $doprogress | $ssh btrfs receive "$backup_location" &>/dev/null
else
btrfs send "$new_snap" | $ssh btrfs receive "$backup_location" &>/dev/null
fi
Expand All @@ -478,8 +483,8 @@ for x in $selected_configs; do
# is an identical subvolume to the old snapshot at the receiving
# location where it can get its data. This helps speed up the transfer.

if [[ $doprogress -eq 0 ]]; then
btrfs send -c "$old_snap" "$new_snap" | pv | $ssh btrfs receive "$backup_location"
if [[ -v doprogress ]]; then
btrfs send -c "$old_snap" "$new_snap" | $doprogress | $ssh btrfs receive "$backup_location"
else
btrfs send -c "$old_snap" "$new_snap" | $ssh btrfs receive "$backup_location"
fi
Expand Down