Re: Scanning pg_tablespace from walsender

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Magnus Hagander <magnus(at)hagander(dot)net>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Scanning pg_tablespace from walsender
Date: 2011-01-03 15:50:11
Message-ID: 19792.1294069811@sss.pgh.pa.us
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Magnus Hagander <magnus(at)hagander(dot)net> writes:
> On Mon, Jan 3, 2011 at 16:29, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> Wait a minute. Isn't this problem about to metastasize into "I need to
>> read *every* global catalog from walsender"? If not, why not? If so,
>> I think we need another answer.

> Um, why would I need that? I need to be able to find all files, which
> means I need to find all tablespaces. I don't see how that would turn
> into "every global catalog"?

Well, if you just need to find all the files, scan the symlinks in
$PGDATA/pg_tblspc/. Don't turn a filesystem problem into a catalog
problem.

regards, tom lane

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