Re: WAL archive cleanup om master

On 01/06/2014 03:18 AM, Martijn van Oosterhout wrote:
> Hoi,
>
> I've setup a up WAL shipping configuration as described in the wiki. On
> the master I have:
>
> archive_mode = on
> archive_command = 'cp %p /path_to/archive/%f'
>
> and on the slave in the recovery.conf I have:
>
> archive_cleanup_command = 'pg_archivecleanup /path/to/archive/ %r'
> restore_command = 'cp /path/to/archive/%f %p'
>
> In between the two machines I have an rsync process copying the files
> from the master to the slave.
>
> My problem is, that the archive_cleanup_command on the slave is
> clearing old WAL files, which the rsync on the master just copies again
> because they are still on the master.
>
> I can make a script on the master that deletes files older than an
> hour, but that will break horribly if the copying breaks for an hour.
>
> Is there a smarter way to do this, like having rsync not copy stuff
> already copied once?

From the Department of Second Thoughts and with aid of additional
caffeine, I am fairly certain that the rsync switch I sent in previous
post will not help. If the archive_command cp is working then rsync will
have nothing to do. If the archive_command cp is not working then rsync
will not create any new files in its absence.

>
> Thanks in advance,
>

--
Adrian Klaver
adrian(dot)klaver(at)gmail(dot)com