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* Re: About postgres pg_upgrade
@ 2024-04-05 07:41 Daniel Gustafsson <[email protected]>
0 siblings, 1 reply; 2+ messages in thread
From: Daniel Gustafsson @ 2024-04-05 07:41 UTC (permalink / raw)
To: Rama Krishnan <[email protected]>; +Cc: pgsql-general
> On 5 Apr 2024, at 06:47, Rama Krishnan <[email protected]> wrote:
> Could you please explain me how does pg_upgrade works one of my friends it works based on pg_restore I am bit confused
The documentation does a fairly good job explaining how it works, and there are
multiple blogposts and presentations on the subject to be found.
https://www.postgresql.org/docs/devel/pgupgrade.html
To summarize in a few words, pg_upgrade does a dump/restore of the schema from
the old cluster into the new, but copies the table data. Your friend is thus
isn't wrong, it does use pg_restore but only for the schema, not the data.
--
Daniel Gustafsson
^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: About postgres pg_upgrade
@ 2024-04-06 17:41 Bruce Momjian <[email protected]>
parent: Daniel Gustafsson <[email protected]>
0 siblings, 0 replies; 2+ messages in thread
From: Bruce Momjian @ 2024-04-06 17:41 UTC (permalink / raw)
To: Daniel Gustafsson <[email protected]>; +Cc: Rama Krishnan <[email protected]>; pgsql-general
On Fri, Apr 5, 2024 at 09:41:05AM +0200, Daniel Gustafsson wrote:
> > On 5 Apr 2024, at 06:47, Rama Krishnan <[email protected]> wrote:
>
> > Could you please explain me how does pg_upgrade works one of my friends it works based on pg_restore I am bit confused
>
> The documentation does a fairly good job explaining how it works, and there are
> multiple blogposts and presentations on the subject to be found.
>
> https://www.postgresql.org/docs/devel/pgupgrade.html
>
> To summarize in a few words, pg_upgrade does a dump/restore of the schema from
> the old cluster into the new, but copies the table data. Your friend is thus
> isn't wrong, it does use pg_restore but only for the schema, not the data.
This presentation shows how it works internally:
https://momjian.us/main/writings/pgsql/pg_upgrade.pdf
--
Bruce Momjian <[email protected]> https://momjian.us
EDB https://enterprisedb.com
Only you can decide what is important to you.
^ permalink raw reply [nested|flat] 2+ messages in thread
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2024-04-05 07:41 Re: About postgres pg_upgrade Daniel Gustafsson <[email protected]>
2024-04-06 17:41 ` Bruce Momjian <[email protected]>
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