Hi
I don't have a link to provide you. I heard this information from the
software architecture team of the company I am working with. They had a
meeting with consultants from Sun microsystems. It seems they had cautioned
against use of entity beans in high-volume production sites. The reason put
forth was that the current crop of app. servers show a degraded performance
when there are a large number of entity beans.
I am trying to get more information on this so that I could discuss it in
the mailing list.
Regards
Anup
James Cook
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03/26/2001 11:47
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----- Original Message -----
From: "Anup Maliyackel" <[EMAIL PROTECTED]>
> 1)Everybody (including sun) agrees to some extent that entity beans are
> performance bottlenecks and they don't scale well. Can somebody elaborate
> on this?
You will have to send me a link on this one. I have a hard time believing
that
Sun considers entity beans to be performance bottlenecks. Inless of course,
they
imply that persisting data is a performance bottleneck. If that's the case,
I
agree. ;-)
> 2)How do different implementations of Entity beans differ in terms of
> clustering in different app. servers?
Entity bean design does not differ in a clustered environment. There was a
time
when WebLogic was advocating a pessimistic locking scheme in their
standalone
containers. When developers leveraged this in their design, they discovered
problems when moving to a clustered environment. Lesson learned, the
database is
the only true locking mechanism.
> 3)If entity beans are not the way to go,what next? ; Session Beans+DAO;
JDO
> etc?
Give me a reason why I would want to use JDO instead of CMP Entity Beans.
DAO
means nothing. It's just an implementation pattern. For example, I use DAO
when
writing BMP Entity Beans.
> 4) what is the status of JDO specs? Can we expect something anytime soon?
Not much news yet...
http://java.sun.com/aboutJava/communityprocess/jsr/jsr_012_dataobj.html
jim
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