senor <frio_cervesa@hotmail.com> writes:
> Since pg_upgrade is in control of how it is calling pg_dump, is there a reason pg_upgrade cannot use the directory
outputformat when calling pg_dump? Is the schema-only operation incompatible?
Well, there's no point in it. pg_dump can only parallelize data dumping,
and there's none to be done in the --schema-only case that pg_upgrade
uses.
Also, since pg_upgrade *does* use parallelism across multiple pg_dump
calls (if you've got multiple databases in the cluster), it'd be a bit
problematic to have another layer of parallelism below that, if it did
indeed do anything. You don't want "--jobs=10" to suddenly turn into
100 sessions.
regards, tom lane