"A month of sundays ago [EMAIL PROTECTED] wrote:"
> Actually, I've got one for you, though. Since there are no insertions, you can use
>dd on both ends, through rsh (or ssh). use it with skip, seek, conv=notrunc,
>count=1, and some appropriate block size (the block size of the filesystems, maybe?),
>and
> the sum command. get the sum on the master with a count=1, skip=whatever, then the
>replica. If they're different, send the master to the replica with seek and
>conv=notrunc. Make sure you do the dd AND the sum all on the remote, so all you pull
>back
> are the checksums. You can do this in a shell script, which would be easier than
>hacking rsync (use an advanced shell (bash,ksh), or perl, as since you need to do
>this, i reckon the numbers could get big.
essentially this, plus ssh.
Best to start a server application, though.
src=$1
dst=$2
blksiz=`expr 64 \* 1024`
count=0
while true; do
srcsum=`dd if=$src count=1 bs=$blksiz skip=$count | md5sum`
dstsum=`dd if=$dst count=1 bs=$blksiz skip=$count | md5sum`
if [ $dstsum != $srcsum ]; then
dd if=$src count=1 bs=$blksiz skip=$count | \
dd of=$dst count=1 bs=$blksiz seek=$count conv=notrunc
fi
count=$[ $count + 1 ]
done
Peter
