What should I read?

Hi there,

I am (still) using 9.5 Postgres.

On my new devices (OrangePi) default installed is 11.9. This also seems 
to be reasonable choice for my Intel laptop(s), as 11.9 offers logical 
replication (as Depesz explained me at some point of time) which is 
needed to replicate data between Intel64(32) and ARM64 platforms.

What should I read to realize differences (ex clusters etc), and learn 
how to configure database and migrate?

Tried about an hour to create database on OPi but failed. Too much 
differences to do it without good reading.


Laurent.