#!/bin/bash
# SETUP OPTIONS
export SRCDIR="/folder/path"
export DESTDIR="/folder2/path"
export THREADS="8"
# RSYNC DIRECTORY STRUCTURE
rsync -zr -f"+ */" -f"- *" $SRCDIR/ $DESTDIR/ \
# FOLLOWING MAYBE FASTER BUT NOT AS FLEXIBLE
# cd $SRCDIR; find . -type d -print0 | cpio -0pdm $DESTDIR/
# FIND ALL FILES AND PASS THEM TO MULTIPLE RSYNC PROCESSES
cd $SRCDIR; && find . ! -type d -print0 | xargs -0 -n1 -P$THREADS -I% rsync -az % $DESTDIR/%
# IF YOU WANT TO LIMIT THE IO PRIORITY,
# PREPEND THE FOLLOWING TO THE rsync & cd/find COMMANDS ABOVE:
# ionice -c2 | 