Re: basebackups during ALTER DATABASE ... SET TABLESPACE ... not safe?

On 2015-01-22 22:58:17 +0100, Andres Freund wrote:
> Because the way it currently works is a major crock. It's more luck than
> anything that it actually somewhat works. We normally rely on WAL to
> bring us into a consistent state. But around CREATE/MOVE/DROP DATABASE
> we've ignored that.

Hah: There's even a comment about some of the existing dangers:
*
* In PITR replay, the first of these isn't an issue, and the second
* is only a risk if the CREATE DATABASE and subsequent template
* database change both occur while a base backup is being taken.
* There doesn't seem to be much we can do about that except document
* it as a limitation.
*
* Perhaps if we ever implement CREATE DATABASE in a less cheesy way,
* we can avoid this.
only that it has never been documented as a limitation to my knowledge...

Greetings,

Andres Freund

--
Andres Freund http://www.2ndQuadrant.com/
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