Re: Re: [COMMITTERS] pgsql: Map basebackup tablespaces using a tablespace_map file

From: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>
To: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Andrew Dunstan <andrew(at)dunslane(dot)net>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Re: [COMMITTERS] pgsql: Map basebackup tablespaces using a tablespace_map file
Date: 2015-09-10 03:49:46
Message-ID: CAA4eK1JcPVEDvH=N9fbs2Cj2h86ML8_jNyHefyic77KFevHm0g@mail.gmail.com
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On Wed, Sep 9, 2015 at 6:43 PM, Fujii Masao <masao(dot)fujii(at)gmail(dot)com> wrote:
>
> On Fri, Sep 4, 2015 at 4:48 PM, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>
wrote:
> >
> > You mean to say, just try renaming tablespace_map and don't display any
> > message whether that is successful or not-successful?
> >
> > I see some user inconvenience if we do this way, which is even after the
> > backup is cancelled, on next recovery, there will be a log message
> > indicating
> > either rename of tablespace_map successful or unsuccessful. Also,
don't you
> > think it is better to let user know that the tablespace_map file is
> > successfully
> > renamed as we do for backup_label file. Shall we change the patch such
that
> > if backup_label is successfully renamed and renaming of tablespace_map
> > gets failed, then display a log message to something like below:
> >
> > LOG: online backup mode canceled
> > DETAIL: "backup_label" was renamed to "backup_label.old", could not
rename
> > "tablespace_map" to "tablespace_map.old"
>
> Agreed with this direction. So what about the attached patch?
>

- errdetail("Could not rename \"%s\" to \"%s\": %m.",
+ errdetail("\"%s\" could not be renamed to \"%s\": %m.",

Is there any reason to change this message?
I think you have changed this message to make it somewhat similar with
the new message we are planning to use in this function, but I don't see
that as compelling reason to change this message.

Other than that patch looks good.

With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com

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