Assaf,
I think we are on the same page now.
You are correct on dirty checking. If other things are updating without
going through our write-cache then dirty checking is always called for as
you say.
-Chris.
> -----Original Message-----
> From: Assaf Arkin [SMTP:[EMAIL PROTECTED]]
> Sent: Monday, January 31, 2000 2:23 PM
> To: [EMAIL PROTECTED]
> Subject: Re: Caching of read-only DB contents in an EJB
>
> > The benefit is that keeping the remote caches in synch lowers the
> potential
> > for dirty check failures. Presumably it is better to have an updated
> cache
> > if possible. And yes this is offset by the cost of keeping the caches in
> > synch in the first case. Depends on update frequency...
>
> I can't see how you can do that. If you synchronize multiple VMs, you
> get both to be as accurate and timely as a single VM. GemStone appears
> to be one of the better companies in multi-VM support, so I trust that
> you can do it.
>
> But you still need dirty checking if updates can occur from the outside,
> as in direct JDBC access. I don't see how you can let go of dirty
> checking at all. If you can then a distributed cache would make a lot of
> sense.
>
>
> > As a side note we don't broadcast changes at the object level, but
> rather
> > synch at the page level. Makes for fewer network round trips which is
> where
> > you usually get burned.
>
> Beautiful.
>
> arkin
>
> >
> > -Chris.
> >
> >
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> --
> ----------------------------------------------------------------------
> Assaf Arkin www.exoffice.com
> CTO, Exoffice Technologies, Inc. www.exolab.org
>
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