Обсуждение: migrating administrative pieces to new install

I have both a production machine and a test machine.
The production machine is running 6.5.2 and FreeBSD 3.0.
The test machine is running 6.5.3 and FreeBSD 3.4.

The idea is to migrate all databases from the prod. machine
to the test machine.  As soon as the test machine works properly
it will become the prod. machine and vice-versa.

All databases are read(select) only.  my pg_hba.conf looks like this:
    local all password passwd.

pg_dumpall fails.  I haven't found a way to supply a username
and password to the command.  The -u flag dosen't work.

pg_dump works but what databases/tables do I dump to get all my
username info.

Any hints for the hintless?

hal

On 2000-01-28, hal Lynch mentioned:

> All databases are read(select) only.  my pg_hba.conf looks like this:
>     local all password passwd.
>
> pg_dumpall fails.  I haven't found a way to supply a username
> and password to the command.  The -u flag dosen't work.

That's right. Since every database could (in theory) have a completely
different authentication scheme, it's not much good to provide a -u option
to pg_dumpall.

Since pg_dumpall calls pg_dump, it would be possible to make pg_dump
recognize when a password is needed automatically. On the other hand I'm
more in favour of scrapping pg_dump altogether and rewriting it on of
these days.

> pg_dump works but what databases/tables do I dump to get all my
> username info.

The global tables are pg_shadow, pg_group, and pg_database. If they're not
too big you might be better off transferring them by hand rather than
bothering too much with getting pg_dump[all] to work.

Of course, temporarily disabling the password authentication would work as
well.

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Peter Eisentraut                  Sernanders väg 10:115
peter_e@gmx.net                   75262 Uppsala
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