Agree absolutely, we had gone down the route of middle tier vb and vb.net components for the business logic. The problem was in Unidata serialising concurrent requests effectively leaving us with a single user system.
Redback would have been a nice option, but we had spent 6 months developing a complete solution so the pain in moving to PDP with a small amount of "data caching" in a Sql Server layer was the quickest way out for us. Concurrency testing of UniOLEDB never occurred to us, we knew UniObjects couldn't handle the thin client / Server processing model and decided based on the IBM info and previous experience of OLEDB to go down that route. How many people routinely test SQL Server or Oracle OLEDB drivers before developing a solution on them? It's a hard lesson to learn. Cheers Nick -----Original Message----- From: Brian Leach [mailto:[EMAIL PROTECTED] Sent: 27 February 2004 09:23 To: 'U2 Users Discussion List' Subject: RE: Uniobjects & Asp Nick, Depends on how you far you need to scale, and if you are looking to support large numbers of users. UniObjects is NOT thread safe, but you can roll your own connection pooling - ie. write your logic into a DLL that maintains a series of connections with some form of semaphoring, and call that from your ASP pages rather than calling UniObjects directly. There's something to be said for keeping your logic in a DLL anyway as ASP coding tends to fragment quite highly, and complex pages can be more of a pain to maintain than a complex DLL! Otherwise, your best bet is to use RedBack, which is designed explicitly to support the ASP model, and provides connection pooling and thread safety with a pretty decent level of performance and high scalability. We have put together a number of applications running across RedBack supporting large numbers of users for a local government, including call centres, billing and other fairly intensive applications and performance has not been an issue. Regards, Brian Leach > -----Original Message----- > From: Cooper, Rudy [mailto:[EMAIL PROTECTED] > Sent: 26 February 2004 21:46 > To: [EMAIL PROTECTED] > Subject: Uniobjects & Asp > > > Hello Everyone, > > I have a requirement to use Asp with Uniobjects. Our OS is W2K and > the backend is UV 10.0.10. I was thinking about creating ActiveX > Dll's in > VB6 that would do things like create a UV session, instantiate subr > object, etc. I read in the u2-users list archive something to the > effect of Uniobjects not being thread safe. Does that still hold true > ? > If so how do you make it thread safe ? > > thx, > > rudy > > -- > u2-users mailing list > [EMAIL PROTECTED] http://www.oliver.com/mailman/listinfo/u2-users > > This correspondence is confidential and is solely for the intended > recipient(s). 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