| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Andres Freund <andres(at)2ndquadrant(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net>, Bruce Momjian <bruce(at)momjian(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Josh Berkus <josh(at)agliodbs(dot)com> |
| Subject: | Re: pg_upgrade and rsync |
| Date: | 2015-01-27 15:25:24 |
| Message-ID: | 12628.1422372324@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> On Tue, Jan 27, 2015 at 9:50 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> That's certainly impossible for the system catalogs, which means you
>> have to be able to deal with relfilenode discrepancies for them, which
>> means that maintaining the same relfilenodes for user tables is of
>> dubious value.
> Why is that impossible for the system catalogs?
New versions aren't guaranteed to have the same system catalogs, let alone
the same relfilenodes for them.
regards, tom lane
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