Re: upgrade and migrate
Ron <[email protected]>
| Newsgroups | gmane.comp.db.postgresql.general |
|---|---|
| Message-ID | <[email protected]> |
On 12/3/19 10:48 PM, 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. I've successfully migrated three 1-2 TB databases across data centers in about 12 hours each, from 8.4 to 9.6. Used eight threads, and the 9.6 pg_dump against the 8.4 database. 17TB is a "bridge too far", though... > Depending on the downtime you are ready to accept, > a migration based on Slony could be something to investigate. > -- > Michael -- Angular momentum makes the world go 'round.