exf=`ssh root@$computer "ls ~/.backup/exclude"`
# We try to run tar on the remote computer
- # z gzip it
# c create archive
# C change to directory first
# . where to start taring (see C)
# $lastcmd only files newer than this
# --one-file-system don't traverse file systems
+ # --use-compress-program compress it using gzip or pigz
# --exclude-from file to get exclusion pattern from
# Pipe the stuff over ssh to ourselves, run pee to cat the contents to a
# file and build a file list, respectivly.
TARFILE=$DATE.tmp
- TARCMD="ssh root@$computer \"nice -n 19 ionice -c3 tar --one-file-system -zcf - -C $filesystem . $lastcmd \
+ TARCMD="ssh root@$computer \"nice -n 19 ionice -c3 tar --one-file-system --use-compress-program $compressor -cf - -C $filesystem . $lastcmd \
--exclude-from=$exf\" | pee \"cat > $TARFILE\" \"tar tzvf -\""
echo `date`" $computer: Running $TARCMD" >&2
eval $TARCMD > $DATE.idx
- if [ -s $TARFILE ]; then
- # File is >0 in size, we assume it worked.
+ if [ $? -eq 0 ] && [ -s $TARFILE ]; then
+ # File is >0 in size and neither cat or tar tzvf failed; we assume it worked.
# Move tar file in place
mv $TARFILE $DATE.tgz
# We don't want to return 0
die
fi
+
+ # Check if pigz is available
+ if ssh -n root@$computer "pigz -V 2>/dev/null"; then
+ compressor=pigz
+ else
+ echo `date`" $computer: pigz missing; falling back to gzip."
+ compressor=gzip
+ fi
filesystems=""