Bruce Momjian <br...@momjian.us> writes: > You might remember we added a postmaster/postgres -b switch to indicate > binary upgrade mode. The attached patch prevents any client without an > application_name of 'binary-upgrade' from connecting to the cluster > while it is binary upgrade mode. This helps prevent unauthorized users > from connecting during the upgrade. This will not help for clusters > that do not have the -b flag, e.g. pre-9.1.
> Does this seem useful? No ... that seems like a kluge. It's ugly and it's leaky. What we really ought to be doing here is fixing things so that pg_upgrade does not need to have a running postmaster in either installation, but works with some variant of standalone mode. That would actually be *safe* against concurrent connections, rather than only sorta kinda maybe safe. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers