Re: Business-logic in 3-tier architecture

From: Marshall Spight <mspight_at_dnai.com>
Date: Mon, 14 Oct 2002 06:18:47 GMT
Message-ID: <bltq9.34467$NW3.6687_at_sccrnsc03>

"Alfredo Novoa" <alfredo_at_nospam_ncs.es> wrote in message news:3da88466.510794_at_news.wanadoo.es...
>
> The 3 tiers are at implementation level not at logical level.
>
> Logically there are still 2 tiers: client applications and the DBMS,
> but the logical DBMS has 2 physical tiers: the middleware and the
> SQL-DBMS.
I agree, but I would go further. I would say that, logically, there is only one tier. The fact that the application the user is running is distributed, and uses a DBMS, is implementation-specific.

Marshall Received on Mon Oct 14 2002 - 08:18:47 CEST

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