> we were able to go as much as 120 concurrent user with clean servlet for
> delivering Test with weblogic ( no clustering ) , now we are able go more
> than 300 concurrent user after we moved to EJB. FYI we have a target of 1000
> concurrent user. and we are thinking of clustering and replicating.
Is that because EJB does something magical to your CPU, or just becuase
you're using a connection pool + object cache in EJB and were not using
it with Servlets?
Try using an O/R mapping product that can take advantage of the
connection pool and has an internal cache, and most likely you will
scale to 400/500 concurrent users by eliminating the remote method
overhead.
But all that doesn't mean you shouldn't use EJB, it just means for some
stuff you can get better performance without using EJB.
arkin
>
> > From: A mailing list for Enterprise JavaBeans development
> > Sent: Thursday, February 24, 2000 1:57 PM
> >
> > I hate to speak for Richard, but I think his point is that for read-only
> > queries that are basically transaction-free that EJB is perhaps more
> > overhead than is needed. I am working on exactly such a system
> > where we are
> > considering using Servlets for queries that are for read-only purposes and
> > EJB for updates. If the query is for reading / writing, then the
> > "overhead"
> > that EJB comes with is not an issue because of all of the other benefits
> > that come with EJB.
> >
> > DB
>
> > From: Frank D. Greco [mailto:[EMAIL PROTECTED]]
> > Sent: Thursday, February 24, 2000 9:26 AM
> >
> >
> > >Ahi Satapathy wrote:
> > >> So when EJB should be used ? what should be the factor one should
> > consider
> > >> before going to implement something with EJB ? If the site is not
> > >> transactional, has no authorization security needs, and is read only,
> > should
> > >> one go for simple Java Objects and use Servlets with direct
> > JDC access
> > ??
>
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--
----------------------------------------------------------------------
Assaf Arkin www.exoffice.com
CTO, Exoffice Technologies, Inc. www.exolab.org
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