I did not read the OP that way: cross platform support, fault-tolerance and ability to integrate into a bespoke client/server solution (iow, there is already a

I did not read the OP that way: cross platform support, fault-tolerance and ability to integrate into a bespoke client/server solution (iow, there is already a network client and a server). Even with that, librsync highlights that rsync is really a protocol rather than the CLI tool GP post referred to.