AW: RAC and ASM disk layout
- From: <F.Castillo@xxxxxxxxxxxxx>
- To: <salem.ghassan@xxxxxxxxx>, <robertgfreeman@xxxxxxxxx>
- Date: Mon, 12 Jun 2006 10:06:09 +0200
Hi there,
yes, ASM is useful - but you cannot compare CBO and ASM. If there is a bug in
CBO - you still get your data. But if there is a bug in ASM ...?
Felix
-----Ursprüngliche Nachricht-----
Von: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] Im
Auftrag von Ghassan Salem
Gesendet: Montag, 12. Juni 2006 10:02
An: robertgfreeman@xxxxxxxxx
Cc: gogala@xxxxxxxxxxxxx; goran00@xxxxxxxxx; oracle-l@xxxxxxxxxxxxx;
kevinc@xxxxxxxxxxxxx
Betreff: Re: RAC and ASM disk layout
If anybody wants all the bugs out of a product (in this case ASM) before using
it, then let's throw all our softs out the window. If you look at any patchset
(10gR1 or 10gR2), how many patches you find for ASM, compared to, let's say,
CBO? and every body uses CBO.
ASM is not a magic bullet for storage, but it's very useful.
Another point about performance: Netapps say that if you use ASM with iSCSI
configuration to go to their disks, it's faster than using NAS (NFS mount the
disks). They did the tests, not me. So, if you can live with it, ASM is the way
to go.
rgds
On 6/12/06, Robert Freeman <robertgfreeman@xxxxxxxxx> wrote:
On 06/11/2006 03:38:53 PM, goran bogdanovic wrote:
> Depends of how you understand "if you know the way how it works"...I
> do not have to know (every single detail) how internally one airplane
> works, but if I know all the possibilities of the airplane and how to
> use them efficiently, it is enough for me to make my flight efficient
> and comfortable.
>> Except in the cases where the plane has some quirks which will be
straightened
>> up in the future releases. Boeing 747 used to have electric wiring
in the
gas
>> tanks, which was straightened up after the tragedy of the flight
TWA-800
which
>> plunged into Atlantic somewhere east of Long Island, killing
everybody
aboard.
>> There was also a great ship called Itanic, Itanium or something like
that,
>> famous for Kate Winslet singing and Leonardo di Caprio freezing. That
tragedy,
>> and here I don't mean Kate's singing, could have also been avoided,
had
the captain
>> known that his ship was not unsinkable. Other then that, you can
enjoy
your flight or
>> not, depending on the qualities of the plane. You could make a
decision
to take your passengers on the >> fateful flight. You never know. And
that
makes you an ideal marketing
>> target for the new products.
>> Let me ask you a question: would you fly with the new and unproven
Airbus
A380 or
>> would you rather opt for slightly less fancy B-747 instead? I would
definitely chose
>> the latter option. ASM is, in effect, A380. Until it's proven itself
to
the degree
>> of B-747, I'll admire it from afar. You and me are both from the same
area of the
>> world and, as such, we both occasionally fly home and that is a
decision
we both
>> have to make from time to time.
Agree with you, 100%. Caution is always warranted with the new
technology...
Just like us leading edgers, I rather think the captain of Titanic might
well have known of the short comings of the vessel and it's design (as
others did). But it was the latest and greatest!
I've seen clients that used ASM when it first came out and certain
persons
who will go unnamed opted to use it. ASM had lots of problems. I would
not
have done so, and in fact I'm not sure I would now. Just my opinion.
> Like in a Formula 1 race, Michael Schumacher knows how to efficiently
> use and drive good car designed by good engineers, and he was 7 time
> world champion :-) Give one of those good engineers to drive this
car,
> he won't even finish the race :-)
>> Racing is not a big deal. It takes more skill to drive from Stony
Brook
to
>> Manhattan on Monday morning, using I-456, otherwise known as LIE
(Long
Island
>> Expressway). That is where car and driver prove themselves.
Alternatively, you
>> can try I-95 south from Bridgeport, CT to New York City any day of
the
week,
>> during the morning rush hour.
Hey... Boeing has a flying club so those engineers will actually
understand
what it's like to actually FLY an airplane. In fact, I was just reading
a
story of someone at Cessna who started out as an engineer, learned to
fly in
the flying club, and is now a test pilot for the Citation.
>
> I am not saying that a ASM is perfect (CBO is not perfect also) and
> that can be used in every
> situation, but if used properly in right situation, can make a life
of
> a DBA much easier.
>> Or, in some situations, a living hell. I don't want to take a chance.
>> God might play dice, but I do not.
I agree.... until a product is stable, I prefer not to use it. However,
one
has to guard against the other side.... One has to guard against the
"Oh, I
tried that in 7.3, and found a bug in it so I'll never use it again".
That
is way to far on the other side of the fence.
Cheers!
Robert
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