Rsync security

Dan Pritts danno at
Fri Jul 16 17:01:21 GMT 2004

late followup to this thread - i just had noted in the man page
that this was unclear and found this thread waiting on the
list for me when i came to catch up.

       -W, --whole-file
              With this option the incremental rsync algorithm is not used and
              the whole file is sent  as-is  instead.   The  transfer  may  be
              faster  if  this  option  is used when the bandwidth between the
              source and target machines is higher than the bandwidth to  disk
              (especially when the "disk" is actually a networked filesystem).
              This is the default when both the source and target are  on  the
              local machine.

I'd suggest changing the last sentence to  something like 

This is the default when both the source and target are filesystems
(local or networked) mounted on the local machine.  


On Wed, Jun 16, 2004 at 02:37:25PM -0700, Wayne Davison wrote:
> On Wed, Jun 16, 2004 at 12:30:04PM -0400, Chris Shoemaker wrote:
> > Do any "rsync developers" care to confirm/deny?  [...] I've used rsync
> > over NFS with no problems.  
> It has been said many times before that using network-mounted disks is
> suboptimal because rsync is optimizing the data transfer, not the file
> reading -- i.e. if both ends of the transfer are running on the same
> machine, the socket/pipe data that rsync is optimizing is being sent
> locally and the disk-reading is happening via network reads, so rsync
> can't optimize the network use.  However, if you don't mind the
> slowdown, it should work OK (as long as the network filesystem involved
> isn't buggy or have compatibility issues).
> ..wayne..
> -- 
> To unsubscribe or change options:
> Before posting, read:

dan pritts                                       danno at
systems administrator                            734/352-4953 office
internet2                                        734/834-7224 mobile

More information about the rsync mailing list