=?utf-8?B?5p2O5rW36b6Z?= <hailong(dot)li(at)qunar(dot)com> writes:
> I have a PostgreSQL datadir named /export/pg94beta1_data/ which was
> initialized with PostgreSQL 9.4beta1,
> [ and 9.4beta2 won't start with it ]
This is expected; you need to initdb. Or use pg_upgrade to upgrade
the cluster. We had to change pg_control format post-beta1.
regards, tom lane