rsync - Jun 2013 - delaying symlinks sync until the data it points to available

Hi,

   Is there an easy option in rsync which enables it to sync the data 
first and then the symlink pointed to it.  For e.g. at destination I 
have a symlink "new" which points to anything latest at source.  The 
problem is that when the sync happens it updates the "new" link first 
before the data it is pointing to has arrived. This causes me all sorts 
of problem.  Please don't advise me for exclude patterns since the 
symlinks can have different names (other than "new"). I just need that
symlinks are written only after the data they are pointing is completed/done


My illustration may sound simple but my data set is extremely huge and 
very deep dir structures and tons of symlinks under them. Probably I can 
get around programmatically  but checking if there is an easier option 
that I don't know of.


satish at AA:/export/universe >--> ll
total 12
drwxrwxr-x 2 satish cadence1 4096 Jun  6 16:42 10.2
lrwxrwxrwx 1 satish cadence1    4 Jun  6 16:42 new -> 10.2
drwxrwxr-x 2 satish cadence1 4096 Jun  6 16:43 9.2
drwxrwxr-x 2 satish cadence1 4096 Jun  6 16:43 8.2


-SS

On Thu, Jun 6, 2013 at 1:55 PM, Satish Shukla <satish at cadence.com>
wrote:
> Is there an easy option in rsync which enables it to sync the data first
> and then the symlink pointed to it.

No, there is not.  A couple possible other solutions:

Consider using --delay-updates so that rsync moves all the completed
files/symlinks into place very rapidly (make sure to use a relative
--partial-dir, which is true by default).

Or consider using the atomic-rsync script from the support dir which would
allow you to do a normal --link-dest transfer into a new directory and (if
setup with symlinks) atomically move the whole new hierarchy into place at
once.

..wayne..
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