Re: [rdiff-backup-users] Incremental, automated, remote, secure

[Greg Troxel]

Basically run dump or something on the client, to a holding disk file on
the server with the tape.   I don't see any issue with temporary disk
use.  The point is that all the temp bits are written anew each time,
not assumed to be the same based on metadata.

amanda is a system that works this way.