On 06/08/2015 06:26 AM, otheus uibk wrote:
On Mon, Jun 8, 2015 at 3:13 PM, otheus uibk <otheus.u...@gmail.com
<mailto:otheus.u...@gmail.com>> wrote:

    Thank you, all.  The manual for 9.4 is indeed clearer on this point
    than the 9.1 version.


Just to nit-pick, I see nowhere in either version of the manual the
indication that it is normal for postgresql to continue to update files
in its data catalog between pg_start_backup and pg_stop_backup. The
closest I see comes in this paragraph:

** Some file system backup tools emit warnings or errors if the files
they are trying to copy change while the copy proceeds. When taking a
base backup of an active database, this situation is normal and not an
error.

Does "this situation" refer to the tools emitting warnings or to the
fact that postgresql is updating the files? It might be the case, for
instance, that timestamps are updated but not the contents of the files
(this is what I had assumed prior to today).

Not sure what you are using these backups for, but have you looked at?:

http://www.postgresql.org/docs/9.4/static/app-pgbasebackup.html


--
Otheus
otheus.u...@gmail.com <mailto:otheus.u...@gmail.com>
otheus.shell...@uibk.ac.at <mailto:otheus.shell...@uibk.ac.at>



--
Adrian Klaver
adrian.kla...@aklaver.com


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