On Wed, 2019-12-04 at 13:48 +0900, Michael Paquier wrote: > 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. I would have personally avoided using pg_dump > above 10~20GB. Depending on the downtime you are ready to accept, > a migration based on Slony could be something to investigate. Right, Slony is the way to go, since pg_upgrade doesn't support 8.3. I would upgrade to a version more recent than 9.6. Yours, Laurenz Albe -- Cybertec | https://www.cybertec-postgresql.com
