Is there a command, such as rsync, which can synchronise huge, sparse, files from one linux server to another?
It is very important that the destination file remains sparse. It may be longer (but not bigger) than the drive which contains it. Only changed blocks should be sent across the wire.
I have tried rsync, but got no joy. groups.google.com/group/mailing.unix.rsync/browse_thread/thread/94f39271980513d3
If I write a programme to do this, am I just reinventing the wheel? http://www.finalcog.com/synchronise-block-devices