can rsync scan files only with mtime since T?

[Matt McCutchen]

On 8/23/07, Ming Zhang <blackmagic02881 at gmail.com> wrote:
> this one looks interesting! fire a flame here, which one is better,
> unison or rsync, for daily backup purpose?

Fundamentally, rsync does stateless one-way copying and Unison does
stateful two-way synchronization.  Backup is one-way, so rsync is more
appropriate for almost all backup tasks.  However, in your case where
there are so many files that you can't afford to send the entire file
list with every backup, Unison does what you need.

Matt