On Wed, May 10, 2017 at 5:05 AM, Fabrízio de Royes Mello < fabri...@timbira.com.br> wrote:
> > Em ter, 9 de mai de 2017 às 17:40, basti <mailingl...@unix-solution.de> > escreveu: > >> Hello, >> >> I must convert a Latin9 Pg-cluster (Version 9.1) in utf-8 with minimal >> downtime, if possible. >> My idea is to use WAL replication for that. >> Is it usable for that or in other words, can WAL Replication handle >> different encoding on master/slave? > > > Short answer: no! > > > Is there perhaps an other way to do that? > > > I never tried it, but you can use some logical replication tool like Slony. > > > Is it possible to use on Master Version 9.1 and on Slave 9.6 (it will >> get the new master in the next step)? >> >> > Unfortunately no because on 9.1 version we don't have support for logical > replication yet. We start supporting it since 9.4 using pglogical > extension. As I said before you should consider use one external > replication tool like Slony to do this job. > > In a scenario like this it might also be worth upgrading to 9.6 using pg_upgrade while maintaining the latin9 encoding, and then do a second migratino which changes the encoding from 9.6 w latin9 to 9.6 w utf8. That way you can get access to the newer tools such as pglogical to help you do that. -- Magnus Hagander Me: https://www.hagander.net/ <http://www.hagander.net/> Work: https://www.redpill-linpro.com/ <http://www.redpill-linpro.com/>
