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

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Simon Riggs <simon(at)2ndQuadrant(dot)com>
Cc: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Backup history file should be replicated in Streaming Replication?
Date: 2009-12-22 19:02:21
Message-ID: 22583.1261508541@sss.pgh.pa.us
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Simon Riggs <simon(at)2ndQuadrant(dot)com> writes:
> The backup history file is a slightly bit quirky way of doing things and
> was designed when the transfer mechanism was file-based.

> Why don't we just write a new xlog record that contains the information
> we need?

Certainly not. The history file is, in the restore-from-archive case,
needed to *find* the xlog data.

However, it's not clear to me why SR should have any need for it.
It's not doing restore from archive.

regards, tom lane

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