Re: Does Oracle 10g make the Application Server (almost) insignificant?

Hello Roel,

  IMHO: [Quoted]      For a big systems you still need to architect separate layers: you may [Quoted] need 100-200 database servers, but multiple thousand's of application servers at least, separated by functionality, geo-location, etc.

    As for the DR failover architecture it is much more transparent to fail-over database layer with almost no interruption to application vs. dragging to DR whole system.

Regards,

  Ron
  DBA Infopower
  http://www.dbainfopower.com
  Standard disclaimer:
http://www.dbainfopower.com/dbaip_advice_disclaimer.html

"rcf<_no.SPAM_> _at_wxs.nl>" <"rcf<_no.SPAM_> wrote in message news:402bdf50$0$1583$e4fe514c_at_dreader15.news.xs4all.nl...
> In my belief the valid reasons for having an application server/layer are:
> - fail-over/system availability: the application layer can be divided
> over many different nodes; failure of one will not result in system
failure.
> - scalability: the application layer is deployed on a number of
> different, relatively cheap nodes - this number can easily be increased.
> - load balancing: this prevents one node to be a bottleneck while others
> have nothing to do.
> (But maybe there are more reasons...)
> So, the fact that the application layer is deployed on many, cheap nodes
> (servers) allows it to offer the services that made it imperative within
> the 3-tier concept.
>
> BUT:
> Since the introduction of Oracle10g, the typical enterprise scale
> database hardware will shift from one very expensive, high-end server to
> a farm of standardized, commodity priced components/servers. This means
> that you no longer need an application layer to have a scalable, fault
> tolerant system with flexible load balancing: the database layer can do
> this for you now! (Besides, the fault tolerance of the application layer
> wasn't of much use if you're database goes down.)
>
> So my conclusion is that for many – if not most – Oracle Internet
> applications, the application layer will become less important with the
> introduction of Oracle10g. The data layer will take over! Apart from
> some simple tasks like connection pooling and processing XML into a
> presentation format or a web service – and even these tasks can be done
> by the Oracle database! - there no longer seems to be a valid reason
> for having a robust application server.
>
> I'm very interested in other people's views on this subject.
>
> Regards,
>
> Roel
Received on Fri Feb 13 2004 - 08:59:51 CET