AW: RAC and ASM disk layout

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_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] Im Auftrag von Ghassan Salem Gesendet: Montag, 12. Juni 2006 10:02
An: robertgfreeman_at_yahoo.com
Cc: gogala_at_sbcglobal.net; goran00_at_gmail.com; oracle-l_at_freelists.org; kevinc_at_polyserve.com 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_at_yahoo.com> 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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