(3 -- DEV/Test/UAT) 2nd blade -- the HTTP server will be installed from the application build rather than as a separate install; and
three PostgreSQL database instances (3 -- DEV/Test/UAT) on the last blade.
From: Scott Marlowe [mailto:smarlowe@xxxxxxxxxxxxxxxxx]
Sent: Fri 2/16/2007 2:50 PM
To: Henry, Nigel, CYFD
Subject: RE: [ADMIN] Isolated databases or instances
There was no chastisement intended. Please, post your
reply to the
list, and include the details I asked for (i.e. what exactly are
you
trying to accomplish here) and let's all work on it
together.
Perhaps multiple pgsql instances are the best answer.
Perhaps VMWare is
the best way to accomplish it. We just don't have
enough details.
On Fri, 2007-02-16 at 14:09, Henry, Nigel, CYFD
wrote:
> Thank you, sir. I stand chastened before my
colleagues.
>
> Nigel D. Henry
> State of New
Mexico
> Computer Software Engineer
> Children, Youth, & Family
Division
> Nigel.Henry@xxxxxxxxxxx
> (505)
841-6631
>
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______________________________________________________________________
>
From: Scott Marlowe [mailto:smarlowe@xxxxxxxxxxxxxxxxx]
>
Sent: Fri 2/16/2007 12:52 PM
> To: Henry, Nigel, CYFD
> Cc:
pgsql-admin@xxxxxxxxxxxxxx
> Subject: Re: [ADMIN] Isolated databases or
instances
>
>
>
> On Fri, 2007-02-16 at 13:18, Henry,
Nigel, CYFD wrote:
> > We are at the beginning of the building of a
3-tier
> > development/test/uat environment. We would like
some advice on how
> > the PostgreSQL database should be configured for
this environment.
> >
> > The environments will be installed
on three blades of an IBM Blade
> > Center. Due to budget
restrictions, we are building the three
> > environments with separate
install instances of the HTTP server
> > (3) 1st blade; separate
install instances of the application server
> > (3) 2nd blade -- the
HTTP server will be installed from the
> > application build rather
than as a separate install; and
> > three PostgreSQL database instances
on the last blade.
> >
> > My concern is that building the
PostgreSQL databases as instances
> from
> > a single binary
could lead to problems in a development environment.
> > My
recommendation is to create three isolated databases (3
> > binaries)
for each environment to mitigate an unforeseen mishaps.
> >
>
> I would like some advice on what would be the best practice for
>
> building a development environment, such as described above, in the
>
> type of environment described above.
>
> What exactly are you
trying to accomplish with multiple PostgreSQL
> instances here? I
can't see there being any great advantage to three
> separate instances
than having three discrete databases defined in one
> instance. Use
pg_hba.conf to restrict connections to the databases to
> the proper users
(testing, staging, and production, I assume) and you
> should get the same
effect with less complexity.
>
> If you really need three discrete
instances, you might want to look at
> using vmware to set up three
separate virtual machines, each with
> their
> own IPs etc... on
that one box.
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