Helen,

In article <5.2.0.9.2.20021217223244.03591210@...>,
helebor@... says...

> At 08:02 AM 17-12-02 +0000, you wrote:
> >Hi,
> >
> >We are converting a 2-tier project that worked flawless with IBO to 3-
> >tier. The options at the moment are MIDAS and DbOvernet. For both I have
> >a basic framework ready.
> >
> >Has anybody used IBO + Firebird + MIDAS before??
> >The reason I ask is because I can get the middleware, we use
> >socketserver, to lock up consistently. This happens when I access the
> >middleware with more than one client. My guess is that it has something
> >to do with threading.
> >DbOvernet by default doesn't thread and here I don't see any lockups.
> >
> >I am using a single TDataModule that contains
> >IB_Connection
> >IB_Transaction
> >Session Management
>
> By Session Management, do you mean that you explicitly drop a TIB_Session
> into the datamodule and set the IB_Connection's IB_Session property to it?
> It won't be enough if you are just using IB_SessionProps to access the
> default session...

I am using a TIB_Session component

>
> >Each TRemoteDataModule uses
> >Multiple Instance
> >Apartment
>
> I can't comment on this with assurance, but it's my belief that with IBO
> you can use the neutral or the free-threading model, provided the instances
> of your RDM are properly isolated in their own IB_Session. Can you provide
> more information about your session management in the two-tier app?

We didn't do any explicit threading in the 2-tier app, it was fast
enough by itself.

My question is how do I use the TIB_Session component together with a
remote datamodule??
Should each RDM have a TIB_Connection and a TIB_Session, or can I use a
single TIB_Connection component and a TIB_Session component placed on a
normal TDataModule and link the other datacomponents on a RDM to this
datamodule??

>
> >I haven't tried
> >Single Instance
> >Single
> >
> >yet
>
> I don't believe it will be necessary to go to this extreme.
>
>
> >Furthermore I am still using IBO3 but thinking about going to IBO4
>
> IBO3 is two-year-old technology that peaked with Delphi 5. The fact that
> you mention "Midas" suggests you are still at D5 or lower. What version of
> Delphi or CPPB are you planning to use for the redevelopment?

The plan is to move from Delphi 5 to Delphi 7, I guess it is called
DataSnap now...

>
> Helen
>