Re: archive_command vs. cp -i

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"Martin Münstermann"<mmuenst@xxxxxx> wrote:
 
> while setting up a new linux postgresql server, I checked my 
> archive_command.  I noticed that the usual "cp -i f1 f2 <
> /dev/null" did NOT as expected:  It did not overwrite the file
> (PASS), but it returned zero (FAIL, should return error).
> 
> This could be reproduced on CentOS 5.6, RHEL4, and Ubuntu 10.04.
 
I've confirmed on SLES 10 and Ubuntu 9, too.
 
> Should the BACKUP-ARCHIVING-WAL doc be changed?
 
I think so.  Given the wide variety of platforms on which the
example could silently cause data loss, I *really* don't think we
want that in our docs.  Someone could blithely copy it into
production without testing and not know they had it wrong until a
backup failed to restore.
 
-Kevin

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