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

Hi,

On Thu, Nov 26, 2009 at 5:20 PM, Fujii Masao <masao(dot)fujii(at)gmail(dot)com> wrote:
> On Thu, Nov 26, 2009 at 5:17 PM, Heikki Linnakangas
> <heikki(dot)linnakangas(at)enterprisedb(dot)com> wrote:
>> Yeah, that needs to be addressed regardless of HS, because you can
>> otherwise start up (= fail over to) the standby too early, before the
>> minimum recovery point has been reached.
>
> Okey, I address that ASAP.

pg_stop_backup deletes the previous backup history file from pg_xlog.
So replication of a backup history file would fail if just one new
online-backup is caused after the base-backup for the standby is taken.
This is too aggressive deletion policy for Streaming Replication, I think.

So I'd like to change pg_stop_backup so as to delete only backup
history files of four or more generations ago (four is enough?).

Thought?

Regards,

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