Re: Backup history file should be replicated in Streaming Replication?

On Thu, Dec 24, 2009 at 1:39 PM, Fujii Masao <masao.fujii@gmail.com> wrote:
> On Wed, Dec 23, 2009 at 7:50 PM, Heikki Linnakangas
> <heikki.linnakangas@enterprisedb.com> wrote:
>> Ok. How about writing the history file in pg_stop_backup() for
>> informational purposes only. Ie. never read it, but rely on the WAL
>> records instead.
>
> Sounds good. I'll make such change as a self-contained patch.

Done. Please see the attached patch.

Design:

* pg_stop_backup writes the backup-end xlog record which contains
  the backup starting point.

* In archive recovery, the startup process doesn't mark the database
  as consistent until it has read the backup-end record.

* A backup history file is still created as in the past, but is never
  used.

Regards,

--
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center