| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | "D'Arcy J(dot)M(dot) Cain" <darcy(at)druid(dot)net> |
| Cc: | Larry Rosenman <ler(at)lerctr(dot)org>, "Maeldron T(dot)" <maeldron(at)gmail(dot)com>, pgsql-general(at)postgresql(dot)org, pgsql-general-owner(at)postgresql(dot)org |
| Subject: | Re: Uber migrated from Postgres to MySQL |
| Date: | 2016-07-29 19:07:53 |
| Message-ID: | 20160729190753.GH12810@momjian.us |
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| Lists: | pgsql-general |
On Fri, Jul 29, 2016 at 03:03:46PM -0400, D'Arcy J.M. Cain wrote:
> As does NetBSD. The problem is that unlike Python (which BSD allows
> multiple versions) there is only one executable to deal with. It's not
> an insurmountable problem but it could get messy.
>
> The answer is either chroot or mount and run pg_upgrade on another
> server. If you can afford the downtime you can also delete PG, install
> the new version and run pg_upgrade without modifying the existing DB.
> If it succeeds then replace the directories and restart the new
> version. If it fails then uninstall PG, reinstall the older version
> and restart. Lather, rinse, repeat until it upgrades cleanly.
pg_upgrade needs to run the old and new server binaries as part of its
operation, so that would not work.
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ As you are, so once was I. As I am, so you will be. +
+ Ancient Roman grave inscription +
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