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Article View: borland.public.cppbuilder.database.multi-tier
Article #1692

Making Midas useful

#1692
From: peterayre
Date: Mon, 02 Aug 1999 00:00
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Please feel free to correct me or point out any mistakes in what I am about
to post.
I have not been using the Midas stuff until now and admit that I may be
missing something.

I have a multi-user system around 30 on our larger set-up.
This is attached to SQL Server using ODBC.

These machines are all querying away in a time critical application and
return data that is so similar that only filters would be required to
differentiate between any two set-ups.

currently this means that from 30 different sources a single query comes in
about twice a second.
This is a considerable load for a complex query on a large and busy table.

I had an Idea and thought that if I use the Midas components then I can make
this query once and then distribute it to many machines.
This seemed like a fine use of the multi tiered functions.

however a little checking shows me that when I try this I am not simply
returning the results of a single query to whichever applications request
them.  I am re-querying every time.  Using SQL Trace shows me the same query
hitting the server very time I open a new Client or refresh the view in an
existing client.

I want to make Midas work for me but if this is the normal behaviour then
what is the point.  I cannot see that it makes any difference if I query
directly from 30 points or get a single point to query for me 30 times.
I would be better setting up a temporary paradox table on a single machine.

It may be that I could loose the ODBC connection under this regime but on an
NT  based system I cannot see any gain.

As I said at the top I could be missing the point or just plain wrong but
PLEASE could someone enlighten me here.

Thanks

Peter
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From: <peterayre@enterprise.net>
Subject: Making Midas useful
Date: 1999/08/02
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