Looking at this from outside, I would suggest that session persistence
creates the overheads, so if you are running a traditional application that
needs to maintain a single session per user (e.g a green screen or UniOjects
application) you are probably limited to several thousand users on current
hardware. There are a number of sites over here that run those sort of

If you adopt a 'pure database' model (i.e. not an embedded database running
the application) a la SQL Server or Oracle, where you are just farming data
in response to requests or calling atomic stored procedures, and using some
form of responder architecture, I cannot see why there should be any real
scaling limits. After all, we run hundreds of users through RedBack on
hardware that is not particularly massy or fast.


-----Original Message-----
Behalf Of Dawn M. Wolthuis
Sent: 23 April 2004 14:50
Subject: How far can U2 scale?

At what point in the life of application software would it be so large that
you could not (or would not want to) support it with your existing UniData
or UniVerse database?  

Is there a point where you would be better served by DB2 or Oracle, for
example due to the scale you are working with?

I hear people talk about moving way from U2 in order to do ODBC and use
standard industry tools (and most find that the grass is not greener for
those purposes), but I don't hear about switching because of running into
scaling issues.  However, we sometimes think of PICK as addressing
small-to-mid size businesses and RDBMS folks sometimes think of their
products as scaling the best.

So, what's the cut-off for U2?  Thanks.  --dawn

Dawn M. Wolthuis
Tincat Group, Inc.

Take and give some delight today.

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