Re: duplicate key value violates unique constraint and duplicated records

Sure, here it is.

pg_basebackup -h servername -R -P -D /data/upgrade/94 -U pgsql -v —xlog-method=stream —checkpoint=fast

/usr/pgsql-9.5/bin/initdb -D /data/upgrade/95/ —encoding=utf8 —locale=ru_RU.utf8 —lc-collate=ru_RU.utf8 —lc-ctype=ru_RU.utf8 —lc-messages=en_US.utf8

Then updating:
/usr/pgsql-9.5/bin/pg_upgrade -b /usr/pgsql-9.4/bin/ -d /data/upgrade/94 -B /usr/pgsql-9.5/bin/ -D /data/upgrade/95 -k

and so on to 9.6

after that server starts normally.

-- 
Timokhin 'maf' Maxim

30.06.2017, 16:07, "Adrian Klaver" <adrian(dot)klaver(at)aklaver(dot)com>:
> On 06/30/2017 04:58 AM, Timokhin Maxim wrote:
>>  BTW, we are moving using:
>>
>>  pg_basebackup -h servername -R -P -D /data/upgrade/94 -U pgsql -v —xlog-method=stream —checkpoint=fast
>
> Going from 9.4 to 9.6 is a major version upgrade and you cannot use
> pg_basebackup for that. Besides I can't see how you even got the 9.6.3
> server to start:
>
> /usr/local/pgsql94/bin/pg_basebackup -D /home/aklaver/pgback_test94 -U
> postgres -p 5412 -v --xlog-method=stream
>
> /usr/local/pgsql96/bin/pg_ctl -D /home/aklaver/pgback_test94/ start
> server starting
> FATAL: database files are incompatible with server
> DETAIL: The data directory was initialized by PostgreSQL version 9.4,
> which is not compatible with this version 9.6.3
>
>>  After that we are upping version to 9.6.3.
>
> Given the above how did you actually get 9.6.3 to start?
>
>>  I've looked through the documentation https://postgrespro.ru/docs/postgrespro/9.6/app-pgbasebackup and didn't find details about how pg_basebackup works with b-tree indexes.
>>  Is it possible that pg_basebackup just copies indexes as is and that is cause of corruption. Or it pass indexes as instruction that says "after upping db make indexes" ?
>>
>>  Thank you.
>>
>>  --
>>  Timokhin 'maf' Maxim
>
> --
> Adrian Klaver
> adrian(dot)klaver(at)aklaver(dot)com