On 2019-12-04 08:56, Laurenz Albe wrote:
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.
Also consider Londiste.
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
