From: | Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> |
---|---|
To: | Lou Tseng <ltseng(at)advancedpricing(dot)com>, "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: Seeded Replication |
Date: | 2019-04-04 00:10:04 |
Message-ID: | 5f7d3e5a-9e79-d24b-5ba6-a6c4ebf87b32@aklaver.com |
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Lists: | pgsql-general |
On 4/3/19 4:44 AM, Lou Tseng wrote:
> Hi,
>
> We are working on a project to set up replication from on premises
> Postgresql 10.4 to Azure Postgresql services. However, our database is
> about 200G and it will take a long time to complete the initial data
> copy. We would like to manually seed the subscriber database with data
> dump and then turn on the subscription like depesz showed in this post
> https://www.depesz.com/2017/02/07/waiting-for-postgresql-10-logical-replication/ .
> It works for the small testing database but when I applied same steps
> with entire database, I am getting "ERROR: duplicate key value violates
> unique constraint" errors. Basically postgresql does not recognize the
> primary key.
Actually it does which why you get the error, which by the way is the
same error depesz got in his demo:)
From your subsequent post:
CREATE SUBSCRIPTION ... WITH (enabled = false)
Did the above also have?:
https://www.postgresql.org/docs/11/sql-createsubscription.html
copy_data = false
If not then you would copying over the data again and that would trigger
the duplicate key error.
>
> Any thought / suggestion is helpful!
>
> Lou Tseng
>
> ltseng(at)advancedpricing(dot)com <mailto:ltseng(at)advancedpricing(dot)com>
> <http://www.advancedpricing.com/>
> Advanced Medical Pricing Solutions <http://advancedpricing.com/>
> 35 Technology Parkway South, Suite. 100
> Peachtree Corners, GA 30092
>
>
--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com
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