Re: 8.5 TODO: any info on "Create dump tool for write-ahead logs..." in PITR section (1.4)?

From: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>
To: "shakahshakah(at)gmail(dot)com" <shakahshakah(at)gmail(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: 8.5 TODO: any info on "Create dump tool for write-ahead logs..." in PITR section (1.4)?
Date: 2009-10-05 02:28:17
Message-ID: 3f0b79eb0910041928y7b3bc918wf756ac32e46bebf@mail.gmail.com
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Hi,

On Sat, Oct 3, 2009 at 7:30 AM, shakahshakah(at)gmail(dot)com
<shakahshakah(at)gmail(dot)com> wrote:
> Can anyone elaborate (or point me to some additional info) on the 8.5
> TODO item in the "Point-In-Time Recover (PITR) section (1.4)":
>  Create dump tool for write-ahead logs for use in determining
> transaction id for point-in-time recovery
>     This is useful for checking PITR recovery.
>
> I poked around a bit and found some code that "walks" the WAL logs (in
> src/backend/access/transam/xlog.c, I think) and I could probably
> figure out how to display a WAL log file contents, but I'm hoping
> someone can provide some context as to what issue this TODO item is
> trying to address (i.e., what output would be useful).

I think that xlogdump (http://xlogviewer.projects.postgresql.org/) is
the first step to address that TODO item. Though I'm not sure if the
xlogdump project is still active.

Regards,

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

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