Thanks Ron, glad to hear it worked and someone was successful at it.  I’m on 
the right path then.



Scot Kreienkamp |Senior Systems Engineer | La-Z-Boy Corporate
One La-Z-Boy Drive| Monroe, Michigan 48162 | Office: 734-384-6403 | | Mobile: 
7349151444 | Email: scot.kreienk...@la-z-boy.com
From: Ron [mailto:ronljohnso...@gmail.com]
Sent: Wednesday, September 12, 2018 10:40 AM
To: pgsql-general@lists.postgresql.org
Subject: Re: PG9.1 migration to PG9.6, dump/restore issues

On 09/12/2018 08:55 AM, Scot Kreienkamp wrote:

Hi Everyone,

I am working on a migration from PG9.1 to PG9.6.  Hoping some people can chime 
in on my plans as I am running into some restore issues.

We are upgrading to a new version of PG and migrating to new hardware with RHEL 
7, so I am planning on doing a dump and restore to get moved to the new server. 
 My database is about 300 gigs, not huge but big enough that doing a single 
threaded dump with multi-threaded restore is going to take too much time for 
the window of opportunity I’ve been given.  I know I can use multi-threaded 
restore on PG9.6 using the custom or directory formats, but PG9.1 only supports 
single threaded dump.  To get around this I’m going to disable all database 
access to the PG9.1 databases, then use the PG9.6 tools to do a multi-threaded 
dump and then multi-threaded restore.

These are the commands I was using:
pg_dump -vj 4 -F d -h $OLDSERVER  $DATABASE -f $BACKUPPATH/DATABASE 
--no-synchronized-snapshots
created $DATABASE
pg_restore -evj 4 -d $DATABASE  $BACKUPPATH/$DATABASE   --disable-triggers


This is almost exactly what I did when migrating from 8.4 to 9.6.  As Adrian 
Klaver mentioned, you need to dump the globals and then run that script on the 
new database.

No need to disable triggers, since it's "relevant only when performing a 
data-only restore", and you aren't doing a data-only restore.  Besides, 
pg_restore adds all that metadata -- including PKs, FKs, indexes, etc. to the 
db *after* the data is loaded.

--
Angular momentum makes the world go 'round.


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