Does rsync detect file corruption? -- hard link

[Matt McCutchen]

On Mon, 2009-05-25 at 10:09 +0800, Daniel.Li wrote:
> On Mon, 2009-05-25 at 09:58 +0800, Daniel.Li wrote:
> > What if a video editor?
> > 
> > Lots of work with video files, which is very large, about 500MB per
> > file. Editor only delete or rearrange frames in that file.
> > 
> > And then it will be back up 500MB again. In this case rsync can handle
> > properly. I think.
> 
> I mean in this case, rsync can't handle properly. It will backup 500MB
> again. It'll not save any disk space.
> 
> If I'm wrong, please correct me.

That's correct.  When small changes are made to big files, rsync reduces
network usage but not disk usage.  rdiff-backup
( http://www.nongnu.org/rdiff-backup ) reduces disk usage by storing
deltas in the destination, but then you need rdiff-backup to recover.

-- 
Matt