Re: ASM extent and RAC process doubt

On Aug 18, 7:52 pm, DA Morgan <damor..._at_psoug.org> wrote:
> Palooka wrote:
> > sybra..._at_hccnet.nl wrote:
>
> >> You shouldn't worry about ASM. Think of ASM as Oracle's volume
> >> manager.
> >> Would you ask the same question about the Linux volume manager or
> >> whatever Unix volume manager?
> >> I don't think so.
>
> > Wise words, as always.
>
> > The conceptual difficulty I have with ASM is that Oracle are very good
> > at databases, but OS vendors such as IBM are pretty good at volume
> > managers.
>
> > Serious question: Which should we choose? The Unix admins are of course
> > totally opposed to ASM, since they see it as encroaching on their
> > territory, but of course that is to be expected.
>
> > Palooka
>
> ASM is far superior to all of the volume management software available
> on the market today when hosting Oracle databases. It uses less CPU
> and is far more "Oracle-aware" than any other that I have seen.
> --
> Daniel A. Morgan
> Oracle Ace Director & Instructor
> University of Washington
> damor..._at_x.washington.edu (replace x with u to respond)
> Puget Sound Oracle Users Groupwww.psoug.org

As long as you don't use if for anything that happens to have bugs, like larger than 8K blocksizes... http://forums.oracle.com/forums/message.jspa?messageID=2589212#2589212

There's a lot more if you search in the metalink bug database. It's been around long enough that it should be more mature, but should isn't what is. I've been bitching about Oracle QA for a long time (at least since V6), and this is just one more major example. It also creates tech stack situations where they think an ASM bug which they can't duplicate, but it turns out there actually was a non-ASM bug (like 6977045 for example).

Then again, I _would_ ask this question of other vendors volume managers, as I've seen them screw up too. Ten years ago, anyways. Which is within the order of magnitude how far behind Oracle is on it's debugging.

jg

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