So what should I do in clustered environment? Also is db sequence feature
depends on db vendor?

-----Original Message-----
From: A mailing list for Enterprise JavaBeans development
[mailto:[EMAIL PROTECTED]]On Behalf Of Gene Chuang
Sent: Tuesday, March 19, 2002 1:34 PM
To: [EMAIL PROTECTED]
Subject: Re: High performance synchronized counter?


Try db sequence?  You'll find your counter worthless the moment you upgrade
your
enterprise app to a clustered environment.

Gene
--- Alvin Wang <[EMAIL PROTECTED]> wrote:
> Hi! Gurus,
>
> I implemented a synchronized counter (for example Order ID) using Entity
> bean and use exclusive concurrency control perperty in WL to ganrantee
that
> only one transacation is reading/writing that bean at one time point, so
> that the generated order id will not duplicate. However, I found it is a
> bottleneck. So what is the better design to improve the performance? Or is
> there other way to generate non-duplicate ID strings?
>
> Thanks!
>
>
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