Webform using Office bits to produce something?
If so, it could cause problems, especially if you are actually spinning up
the application on the server, rather than using the DLLs from Office. I am
not sure whether or not it would crash, however. This would depend on what
you are doing and how long the process takes to complete. And, probably most
importantly, whether or not you are locking data in the Office application.
If you are not locking data in the database, it is unlikely, with 25 users,
that two will hit the application instance at the precise same moment, so
you might have no problem. This is, of course, assuming you are only using
the application to produce a result you do not feel you could produce with
other bits. If you are somehow stacking 25 users on a single thread, you
will blow up. I can pretty much guarantee that.
So far I have focused on Office, but it appears you also have other
applications in mind. And, they too may cause problems, but it really
depends on how they are instantiated. Anything that only allows a single
instance could be a blocking point if it does not contain some form of
standard in and standard out for you to use it like a server/service. With
some applications, however, you might be able to spin up 25 instances of the
application without a problem and none of the clients will block another
client. The big issue here is how much memory the application takes when it
is in memory and how long it takes to spin up.
Without having a specific, this is about the best answer I can give you.
--
Gregory A. Beamer
MVP, MCP: +I, SE, SD, DBA
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| Think outside the box!
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"John Devlon" <jo********@hotmail.comwrote in message
news:L6*********************@phobos.telenet-ops.be...
Hi,
With this mail I would like to ask some professional expertise.
I've created an ASP form in vb.net which uses an external application.
Everything works fine. However, Currently, Only 1 user at a time uses the
webpage.
What I would like to know:
If, for example, 25 users at one time, are using the same webform,
triggering the same application (Word, Excell or something else for
example), what would happen ? Is every request automaticly in a que and
waits its turn or does an error occure? Let's assume that every action to
be executed by the external application takes 1 second. Or do I have to
create some sort of applications which holds a request que?
I know that using external applications is not the right approach but in
this case I do not have a work arround.
Looking forward to you responses
Thanks
John
