Rsync deletion issue on failure

[Adam Gordon]

I didn't see this in the man page or after a cursory Google search.

I'm rsync-ing a file from computer A to computer B and the file does
not exist yet on computer B.  My problem is that on a shoddy Internet
connection, if rsync fails due to a connection error, the dot file it
creates on computer B is deleted and I have to start the rsync all
over from the beginning.

Is there a way to tell rsync to NOT delete this dot file and pick up
where it left off after failing?  I was in the middle of a 2-hour/2GB
xfer and the connection died w/ 10MB left.

Thanks,

--adam