can rsync scan files only with mtime since T?

[Ming Zhang]

On Fri, 2007-08-24 at 09:47 -0400, Matt McCutchen wrote:
> 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.

so the stateless is one pros&cons here.

performance wise, does rsync and unison has fundamentally different?
because i saw unison document also mention delta detection algorithm
like rsync.

thx.  

> 
> Matt
-- 
Ming Zhang


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