du giving different values

[chesterman]

hi folks.

first of all, sorry about my poor english, i'm from brasil.

i have some really important data to send from one server to another, so i have done a little bash script that send the data through scp from 20h until 8h am.

my issue is that this data is really really important, and i can't afford to lose anything, so i have done a little check in the and of each directory transfer to check if the directory sizes are the same, so i can safely remove the data from the source server. i want to use bytes as metric for checking (in this case Kbytes is just too big to be a reliable metric).

REMOTE_FILE=`ssh root@<ip-address> 'du -sb /var/data/*' | grep $1 | awk {'print $1'}`
LOCAL_FILE=`du -sb /var/data/$1 | awk {'print $1'}`
if [ $REMOTE_FILE == $LOCAL_FILE ]
then

rm -rf /var/data/$1

else

echo some error sending file $1. i'll try again later. >>/var/log/send.log
sleep 300

fi

but even when the directory is correctly transfered, the du command return different values when executed in the local and remote machine. so the directory is never deleted and is re-sended over and over again.

can anyone help me out with this one?

[tpl]

try using this as first line:

REMOTE_FILE=`ssh root@<ip-address> du -sb /var/data/$1 | awk '{print $1}'`

you may need it like this

REMOTE_FILE=`ssh root@<ip-address> du -sb /var/data/ `$1` | awk '{print $1}'`

to expose the shell variable

[sathiya]

md5sum is the right tool you need to use..

the method you are following right now wont help you much, use md5sum.

[chesterman]

tks sathiya. i hadn't ever consider user a hash check (something much more reliable). i'll try here.