Re: Re: [COMMITTERS] pgsql: Make standby server continuously retry restoring the next WAL

Simon Riggs wrote:
> In 8.4 it is pg_standby that was responsible for clearing down the
> archive, which is why I suggested using pg_standby for that again. I
> agree that will not work. The important thing is not pg_standby but that
> we have a valid mechanism for clearing down the archive.

Good point. When streaming from the master, the standby doesn't call
restore_command, and restore_command doesn't get a chance to clean up
old files.

> So I suggest that you have a new action that gets called after every
> checkpoint to clear down the archive. It will remove all files from the
> archive prior to %r. We can implement that as a sequence of unlink()s
> from within the server, or we can just call a script to do it. I prefer
> the latter approach. However we do it, we need something initiated by
> the server to maintain the archive and stop it from overflowing. 

+1

-- 
  Heikki Linnakangas
  EnterpriseDB   http://www.enterprisedb.com