Laurenz and Hellmuth, replying to both of you!
Thanks for the quick replies BTW!
Thanks for the quick replies BTW!
Martín
On Mon, Feb 18, 2019 at 5:32 PM Hellmuth Vargas <hivs77@xxxxxxxxx> wrote:
Hola MartinPues si uno sigue la secuencia de la pagina de ayuda de PostgreSQLUsage(...)7. Stop both servers(...)10. Upgrade Streaming Replication and Log-Shipping standby servers(...)12. Start the new serverThe new server can now be safely started, and then any rsync'ed standby servers.Pensaría que toca esperar a que terminen todo los rsync de las replicas antes de iniciar la master... Pero tengo incluso una pregunta adicional: si tengo 2 o mas replicas.. se podria sincronizar primero la master con una replica (rsync), iniciar la master y luego emplear la replica sincronizada para sincronizar el resto de replicas mientras que la máster ya se encuentra en funcionamiento?.
I asked myself that question as well. I'm trying to basically minimize the amount of standbys that are going to be affected by the upgrade. The documentation states that you can do something similar to what you describe, the only thing that you need to make sure is to no start the standby if you are going to use it as a source of rsync to another standby. Would that make sense ?
El lun., 18 de feb. de 2019 a la(s) 15:21, Laurenz Albe (laurenz.albe@xxxxxxxxxxx) escribió:Martín Fernández wrote:
> After reading the pg_upgrade documentation multiple times, it seems that after running pg_upgrade on the primary instance, we can't start it until we run rsync from the primary to the standby. I'm understanding this from the following section in the pg_upgrade manual page.
>
> You will not be running pg_upgrade on the standby servers, but rather rsync on the
> primary. Do not start any servers yet.
Immediately following, you can read:
If you did not use link mode, do not have or do not want to use rsync, or want an easier
solution, skip the instructions in this section and simply recreate the standby servers
once pg_upgrade completes and the new primary is running.
So this is not compulsory, it's just an efficient method to quickly get the standby
server updated.
There is nothing wrong with rebuilding the standby later.
I think that by `recreate` here we are talking about pg_basebackup right ? That won't be acceptable because our database would take days to complete. We need to use rsync and leverage the hardlinks.
Yours,
Laurenz Albe
--
Cybertec | https://www.cybertec-postgresql.com
--Cordialmente,
Ing. Hellmuth I. Vargas S.
Esp. Telemática y Negocios por InternetOracle Database 10g Administrator Certified AssociateEnterpriseDB Certified PostgreSQL 9.3 Associate
