Re: New challenge - clustering - do I understand this correctly?

"quarkman" <quarkman_at_myrealbox.com> wrote in message news:oprtr4yir5zkogxn_at_haydn...

> >
> > I don't understand how you can think RAC/OPS is harder on the
> > administrator. All that happens is that a second instance recovers
> > transactions from the failed instance. All else runs along same old same
> > old. What in that requires "complication" from the administrator?
>
>
> Beg to differ. Tuning the beasties is a good deal more complicated than
> tuning a single instance. Care to knock up a GC_FILES_TO_LOCKS parameter
> off the top of your head? And where's the white paper to tell me what a
> good number of multi-block locks is, and when I should group them? And
> where did Oracle get the idea from that LMS and LMD should have latencies
> of less than 20 milliseconds? Where'd that number come from?! Where's the
> scientific proof behind the statistics that the Oracle doco. trots out for
> these RAC-specific tuning measures?

Like I said: setup. Get a consultant that knows the stuff, install it and setup all important parameters. review once in a while. unless the app is so highly variable that it needs daily tuning, that's all you need.

Now, one node goes down and it needs lengthy admin intervention? I don't think so. If it does, then there is something very wrong in the product being delivered...

--
Cheers
Nuno Souto
wizofoz2k_at_yahoo.com.au.nospam