"symmetric" mirroring (was "testing")

[Martin Pool]

On 25 Apr 2002, Rich Winkel <rich at math.missouri.edu> wrote:
> Sorry for the junk mail, it seems my last post was lost in the ether,
> despite being successfully delivered to lists.samba.org (!)
> Very frustrating, since I didn't keep a copy of it.
> 
> My question was regarding what might be called symmetric mirroring,
> where two sets of identical files, both being simultaneously updated,
> are periodically syncronized.

If each side updates a non-overlapping set of files you can do this
using --update to push only the newer file to each side.

If single files are updated on both sides you need a content-dependent
way of merging them, which is out of the scope of rsync.  Have a look
at the Unison tool.

--
Martin