Re: pg_basebackup, pg_receivexlog and data durability (was: silent data loss with ext4 / all current versions)

From: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>
To: Alex Ignatov <a(dot)ignatov(at)postgrespro(dot)ru>
Cc: PostgreSQL mailing lists <pgsql-hackers(at)postgresql(dot)org>, Andres Freund <andres(at)anarazel(dot)de>, Magnus Hagander <magnus(at)hagander(dot)net>
Subject: Re: pg_basebackup, pg_receivexlog and data durability (was: silent data loss with ext4 / all current versions)
Date: 2016-05-13 22:07:12
Message-ID: CAB7nPqQbisqiDiRThWY4SC7ZZ9Uan+6MSz+tqo=S-7RM5xwzpQ@mail.gmail.com
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On Fri, May 13, 2016 at 11:49 PM, Alex Ignatov <a(dot)ignatov(at)postgrespro(dot)ru> wrote:
>
> On 13.05.2016 9:39, Michael Paquier wrote:
> Do we have any confidence that data file is not being corrupted? I.e
> contains some corrupted page? Can pg_basebackup check page checksum (db init
> with initdb -k) while backing up files?

That may be an idea to consider, for one class of users, though this
patch is not aimed at doing something regarding that.
--
Michael

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