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

On Tue, 12 Aug 2003 18:10:08 +1000, Noons <wizofoz2k_at_yahoo.com.au> wrote:

> "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.

Well, I would argue that tuning is very much an on-going process. But your mileage might differ, and that's fair enough.

It would be nice if you could just drop two boxes into a production environment, set them up once, and then forget about them. But I'd be surprised if that's what actually happens to most people.

Regards
HJR
>
> 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
>
>
>

-- 
Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/