[Pgpool-general] Questions about online recovery

[Ramon de Carvalho Valle]

Hi,

I've a pgpool-II replication + load balance environment with seven
backend servers running PostgreSQL 8 and CentOS 5.

The backend 0 (master node) runs both pgpool-II and PostgreSQL. I'm
setting up online recovery with rsync using the same script for both 1st
and 2nd stage commands.

Considering a scenario where the backend 0 (which runs pgpool-II and
PostgreSQL) PostgreSQL is disconnected from pgpool-II, I have the
following questions:

* How online recovery is supposed to work in this case?

* Do I need to have pgpool-II installed on all backend servers? If so, I
will have dummy pgpool-II processes running on backend serves just to
have the pgpool communication manager running and be able to run
pcp_recovery_node from another backend?

* How 2nd stage of online recovery is supporsed to work if I am
recovering from a different backend than the one running pgpool-II and
PostgreSQL will continue accepting connections? Is cascading pgpool-II
connections to the backend servers a correct solution or workaround
here?

Best regards,
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