El 6/12/19 a las 23:07, Alan Hodgson escribió:
On Fri, 2019-12-06 at 21:38 +0000, Julie Nishimura wrote:
I'd like to copy one single database from 9.4 cluster to a new 9.6
cluster (migration with the upgrade), to the different host
Put 9.4 on the new server. Replicate the db to it. When you're ready
to switch, shut down the master, promote the new db, and then shut it
down and pg_upgrade -k it to 9.6.
That does require the binaries from both versions to be on the new
server for a while, but it'll give you the least downtime and it's a
very simple replication setup.
This is the plan we're going to follow to migrate from 9.2 to 9.6, as
this is the only way to achieve almost zero downtime. The cons are,
despite what Alan has mentioned, that you need double space because you
have to create a slave replica.
