Lustre 1.6 Operations Manual

27.2 A Simple Data Migration Script
#!/bin/bash
# set -x
# A script to copy and check files
# To guard against corruption, the file is chksum'd
# before and after the operation.
# You must supply a temporary directory for the operation.
#
CKSUM=${CKSUM:-md5sum}
MVDIR=$1
if [ $# -ne 1 ]; then
echo "Usage: $0 "
exit 1
fi
cd $MVDIR
for i in `find . -print`
do
# if directory, skip
if [ -d $i ]; then
echo "dir $i"
else
# Check for write permission
if [ ! -w $i ]; then
echo "No write permission for $i, skipping"
continue
fi
OLDCHK=$($CKSUM $i | awk '{print $1}')
NEWNAME=$(mktemp $i.tmp.XXXXXX)
cp $i $NEWNAME
RES=$?
if [ $RES -ne 0 ];then
echo "$i copy error - exiting"
rm -f $NEWNAME
exit 1
fi
Chapter 27 Lustre Operating Tips 27-3