Re: Remove Deprecated Exclusive Backup Mode

On Wed, Feb 27, 2019 at 4:35 PM Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at> wrote:
>
> Fujii Masao wrote:
> > So, let me clarify the situations;
> >
> > (3) If backup_label.pending exists but recovery.signal doesn't, the server
> > ignores (or removes) backup_label.pending and do the recovery
> > starting the pg_control's REDO location. This case can happen if
> > the server crashes while an exclusive backup is in progress.
> > So crash-in-the-middle-of-backup doesn't prevent the recovery from
> > starting in this idea
>
> That's where I see the problem with your idea.
>
> It is fairly easy for someone to restore a backup and then just start
> the server without first creating "recovery.signal", and that would
> lead to data corruption.

Isn't this case problematic even when a backup was taken by pg_basebackup?
Because of lack of recovery.signal, no archived WAL files are replayed and
the database may not reach to the latest point.

Regards,

--
Fujii Masao