Re: why rsync wants to delete destination files

[T o n g <mlist4suntong@yahoo.com>]

Thanks for your replay Sam. 

On Fri, 06 Aug 2010 22:47:57 -0500, Sam Leon wrote:

> --delete-before will delete everything in the destination directory that
> is not in the source directory.

As you sure about this?

>From man page:

       --delete-before    receiver deletes before transfer (default)

I.e., "--delete-before" is the default action. It only affect the files 
to be copied over. Nothing else.

  --delete-before

         Request that the file-deletions on the receiving side be
         done before the transfer starts.  See --delete (which is
         implied) for more details on file-deletion.

         Deleting before the transfer is helpful if the
         filesystem is tight for space and removing extraneous
         files would help to make the transfer possible.
         However, it does introduce a delay before the start of
         the transfer, and this delay might cause the transfer to
         timeout (if --timeout was specified).  It also forces
         rsync to use the old, non-incremental recursion
         algorithm that requires rsync to scan all the files in
         the transfer into memory at once (see --recursive).



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