The web/app servers we are using are common HP E 800 machines( 1 P III 800
MHz, 512 MB RAM). This is all backed up by a Compaq DS-20 running Sybase on
top of Tru64 Unix. Half entities are CMP, the other half is constructed by
calling legacy stored procedures. We use Orion 1.5.2 (www.orionserver.com).
Oracle recently licensed Orion's source code, repacking it into OC4J. It is,
by far, the fastest AND the most scalable app server I've used(and yes, I've
used Weblogic extensibly). Most of the bottleneck of the system relies on
the stored procedures performance, but the CMP part (a CMS I developed) can
scale virtually endlessly, as long as you add app server machines to the
cluster and the backing up DB can handle the requests. A single app server
machine has proven to be able to handle all the load (but it is at the very
edge of the nominal load it supports). I think that with a good web/app
server combo, no scaling problems should arise as long as the architecture
is solid. Obviously to me and almost every one else with architecting
experience, no hardware or app server software will make up for an
architecture with weak points.
Some facts about WebSphere:
It's has performance issues (using it on anything different from AS/400 is
just wacko).
Has poor CMP support.
Can't cluster efficently.
Also, by the size of the project, obviously it must be overarchitected
somehow (sometimes I'd wish the keyword extends should be banned from EJB's
;-).
Just my 2c,
Juan Pablo
> -----Original Message-----
> From: Ulas Ergin [mailto:[EMAIL PROTECTED]]
> Sent: Jueves, 05 de Julio de 2001 10:44
> To: [EMAIL PROTECTED]
> Subject: RE: is ejb really for "enterprise" systems
>
>
>
>
> Hi,
> Thanx for replying first,the reason of my question:
>
> I am working in an 'enterprise' project,about 80/100
> developers ans 20
> documentation people.
> In our project we had 1500/2000 entities and 300/400 sessions
> accessing
> them.
> The system architecture groupd said that the performance of
> WebSphere3.5 was
> bad and it's performance is unknown with more than 1000 ejb's
> and 2 clusters
>
> so we switched to another paradigm,1 session accessing java
> classes and they
> are accesing a generic BMP entity.
>
> Ulas Ergin
> Istanbul/Turkey
>
> >
> >Yes, I have. I (along with a team here at Neoris) built a
> web site with
> >heavy use of Session/Entity Beans. It has a farm of 6 web/app
> >servers(they're 6 for resilience and reliability reasons,
> one server alone
> >can handle the load). It serves one million+ hits every
> monday, and has a
> >lot of entity/session beans instances executing (about 900
> EB & 100 SB on
> >peak levels).
> >
> >Also, there are caching mechanisms we use with our SB facade
> that allow us
> >to cache EB's for aproximately 5 seconds (it's VERY useful)
> >
> >HTH
> >
> >JP
> >
> >
> >
> > > -----Original Message-----
> > > From: Ulas Ergin [mailto:[EMAIL PROTECTED]]
> > > Sent: Mi�rcoles, 04 de Julio de 2001 7:46
> > > To: [EMAIL PROTECTED]
> > > Subject: is ejb really for "enterprise" systems
> > >
> > >
> > > Does anyone here have any experience with ejb in an
> > > 'enterprise' project and
> > > saw the performance of ejb,
> > > I mean 1500 entity beans and 300 session accessing them
> > > ejb-spec may not contain any restrictions on it but what
> > > about app server
> > > performance?
> > > I am curious on this?
> > > Does anyone have such experience with
> > > WepSphere/WebLogic/Inprise/Sybase...or
> > > anyother app.server?
> > > Thanx in advance
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