Re: upgrade and migrate

Michael Paquier schrieb am 04.12.2019 um 05:48:
> On Tue, Dec 03, 2019 at 10:32:22PM +0000, Julie Nishimura wrote:
>> Hello, what is the best way to migrate from PostgreSQL 8.3.11 on
>> x86_64-redhat-linux-gnu to PostgreSQL 9.6.16 on x86_64-pc-linux-gnu
>> server, with minimal downtime?
>> The caveat is the source has about 80 databases overall almost 30
>> TB. I could migrate the smallest ones (up to 1 tb) using pg_dump and
>> pg_restore, but the largest hot database is almost 17 tb, and I am
>> not sure how to approach this effort in a better and efficient way?
> 
> pg_upgrade could be one way to go here.  That's not the scale pg_dump
> would be very good at.  

But pg_upgrade only supports 8.4+ 

At least according to the manual.