| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Stephen Frost <sfrost(at)snowman(dot)net> |
| Cc: | Andreas Joseph Krogh <andreas(at)visena(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Clarification in pg10's pgupgrade.html step 10 (upgrading standby servers) |
| Date: | 2017-09-16 16:02:20 |
| Message-ID: | 20170916160220.GD9874@momjian.us |
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| Thread: | |
| Lists: | pgsql-hackers |
On Thu, Sep 14, 2017 at 03:12:50PM -0400, Bruce Momjian wrote:
> I talked with Stephen about this on IM. The issue is that if you don't
> do --delete, and there are files in the primary that are not in the
> standby, they are copied, but files in the standby and not in the
> primary are kept. This could lead to mixed primary/standby log files,
> or worse. Using --delete means the new standby exactly matches the new
> primary and all the steps you need to adjust after a base backup are the
> same.
>
> I added a mention of rsync --dry-run per Stephen's suggestion.
>
> I have also added a paragraph from Magnus that I developed via IM that
> explains that you can use rsync to upgrade one standby from another
> standby, if the standby has not been started.
Patch applied through 9.5. Updated docs at:
http://momjian.us/pgsql_docs/pgupgrade.html
--
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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