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From: Jim Nasby <Jim.Nasby@BlueTreble.com>
To: Andres Freund <andres@anarazel.de>
To: Bruce Momjian <bruce@momjian.us>
To: Josh Berkus <josh@agliodbs.com>
Cc: Stephen Frost <sfrost@snowman.net>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: pgsql-hackers@postgresql.org <pgsql-hackers@postgresql.org>
Subject: Re: tablespaces inside $PGDATA considered harmful
Date: Thu, 23 Apr 2015 15:17:55 -0500
Message-ID: <55395373.9030006@BlueTreble.com> (raw)
In-Reply-To: <36B008EF-B438-45BD-A645-C242F81F609D@anarazel.de>
References: <CA+TgmobZLyLU8tFCbMqbjMWB6t+=ERaDo820uQEJCVAQK_Paow@mail.gmail.com>
	<20150130171920.GJ3854@tamriel.snowman.net>
	<WM!43fd2162c8c08343aade3fbea02e9c2844064c7f40cf603f5080ab78b7a3fbf2728d833090982f0743f5367f06e5a45b!@asav-2.01.com>
	<54CBD519.8030502@agliodbs.com>
	<WM!eb076638a020a207a4a7725ea9d3d99d976a0bfbbd2697fb45c5ea8dd966ae07a6f89f0fffaf4a7cd23e49aaf7416845!@asav-3.01.com>
	<54CBF6FE.8030209@agliodbs.com>
	<20150423024102.GJ13362@momjian.us>
	<55390BC5.3000204@BlueTreble.com>
	<36B008EF-B438-45BD-A645-C242F81F609D@anarazel.de>
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On 4/23/15 11:01 AM, Andres Freund wrote:
> On April 23, 2015 6:12:05 PM GMT+03:00, Jim Nasby <Jim.Nasby@BlueTreble.com> wrote:
>> On 4/22/15 9:41 PM, Bruce Momjian wrote:
>>> The case this doesn't catch is referencing a
>>> symbolic link that points to the same directory.  We can't make it an
>>> error so people can use pg_upgrade these setups.
>>
>> Couldn't we make it an ERROR unless IsBinaryUpgrade?
>
> People still upgrade without pg upgrade.

Yes, but only after creating a brand new cluster from scratch, which 
would then disallow them from putting tablespaces in $PGDATA.

Or are you saying people do binary upgrades without pg_upgrade? I don't 
think we have any obligation to support that...
-- 
Jim Nasby, Data Architect, Blue Treble Consulting
Data in Trouble? Get it in Treble! http://BlueTreble.com


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