Do you ever want your application to be running over a WAN? If so, go
to 3 tier and if not, then don't, but be aware that if you end up having
to move from 2 tier to 3 tier you'll practically be rewriting your app,
unless you've carefully designed it with 3 tier in mind.
"Business logic" is like your database stored procedure logic, not as
efficient but you get to write it in Delphi, and as far as your WAN
client goes it's almost as good as. Eg. your client says "delete this
record" and the server does the referential validation and cascade
deletion as required.
>We will be using two remote mirrored servers as well.... with a
possible
>requirement of remote access in the field and possibly further?
Well, it looks like you've already decided you need a 3 tier
application...
Cheers,
Carl Reynolds Ph: +64-9-4154790
CJN Technologies Ltd. Fax: +64-9-4154791
[EMAIL PROTECTED] DDI: +64-9-4154795
PO Box 302-278, North Harbour, Auckland, New Zealand
12 Piermark Drive, North Harbour Estate, Auckland, NZ
Visit our website at http://www.cjntech.co.nz/
> -----Original Message-----
> From: Julien Thomas [SMTP:[EMAIL PROTECTED]]
> Sent: Wednesday, May 26, 1999 2:32 PM
> To: Multiple recipients of list delphi
> Subject: [DUG]: Client Server Development
>
> I know this is quite a large and complicated question but I would
> appreciate
> some feedback before we attempt to make a decision...
>
> I know all the propaganda about the advantages of thin client and not
> having
> to install ODBC and BDE, but...
>
> What are the other major benefits of 3-tier client server compared to
> 2-tier? if any?
>
> Does MIDAS simplify or complicate the development?
>
> The Borland blurb on MIDAS talks about putting business logic into the
> middle tier server - this is a bit vague. What exactly do they mean by
> the
> 'business logic'? How much can you take out of the client?
>
> So really what I want to know is should we use MIDAS as part of our
> redevelopment of our Delphi application to access our SQL 7 server?
>
> We will be using two remote mirrored servers as well.... with a
> possible
> requirement of remote access in the field and possibly further?
>
>
>
> thanks, in anticipation
>
>
>
> Julien Thomas
>
> ----------------------------------------------------------------------
> -----
> New Zealand Delphi Users group - Delphi List -
> [EMAIL PROTECTED]
> Website: http://www.delphi.org.nz
application/ms-tnef
