MOTHER FUCKER !!!!!!!!!!!!!!!!!!!!!!!!!!!
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>From: Rickard �berg <[EMAIL PROTECTED]>
>Reply-To: A mailing list for Enterprise JavaBeans development
><[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Re: optimistic locking and deadlock (was EBs are slow)
>Date: Sat, 29 Jul 2000 08:51:43 +0200
>
> > > There would be two ways I think:
> > > * dedicate each node to a particular entity -> no need
> > > to update
> > > * Use a CMP implementation that does synched cluster
> > > caching. Use, for example, timestamps for optimistic
> > > concurrency control, or global locks for pessimistic CC
> >
> > > The latter /w OCC would be the more likely case I guess.
> >
> > The former precludes object failover, which is the primary reason for
> > clustering in the first place.
>
>No, it would not. If the node running the entity failed the cluster
>could fail over to use another cluster node.
>
> > The latter requires so much overhead (and serialization) that any
>benefit
> > derived from Option A (entity caching in the container) is lost.
>
>It is very possible to implement a synched cache with minimal overhead
>and *no* serialization (you are making way too many assumptions about
>the implementation here), hence making Option A caches very nice for
>performance, especially in read-mostly scenarios (no db access at all
>for extended periods of time).
>I will demonstrate this in source in jBoss later on.
>
>/Rickard
>
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