OpenGrok

#!/bin/sh

#
# Create a bunch of small files at once, then delete most of them.
# This forces live blocks in nearly empty segments.
# If the filesystem is small enough, the cleaner will have to run in
# order for this to complete.
#
# Argument is directory in which to run.
#
for i in 0 1 2 3 4 5
do
	for j in 0 1
	do
			# Quarter megabyte files, two at a time
			# for a maximum of six at once
			# (enough to force cleaning on a 2.88 disk)
			dd if=/dev/zero of=$1/f$i$j bs=512 count=512 &
	done
	wait
	sync
	rm -f $1/f*1
	df -k $1
	ls -l $1
done

echo "Sleeping for 10 seconds...."
sleep 10

echo "Trying with another half meg"
dd if=/dev/zero of=$1/f61 bs=512 count=1024