Re: Trying to get ASM disks under asmlib rather than system

Don,

To paraphrase, "you probably don't need" ASMLib.

Back to you initial question, what do you see in v$asm_disk when you set asm_diskstring="ORCL:*"?

Btw, you don't need to bounce ASM instance at that change - unmount DG + set asm_diskstring + mount DG.

Cheers,
Alex

On 2-Apr-08, at 8:41 AM, Don Seiler wrote:

> hey Frits, your blog came up many times in my googling last night ;)
> See replies inline below.
>
> On Wed, Apr 2, 2008 at 3:51 AM, Frits Hoogland <frits.hoogland_at_gmail.com
> > wrote:
>
>> btw, any reason you want asmlib disks?
>
> The only "reason" (if you can call it that) is that Oracle seems to
> push it so hard for linux. However we do have a whitepaper from
> Symantec on setting up Veritas and ASM without asmlib, so we'll
> probably go that route when we get a chance to redo it all.
>
>> asmlib disks mean you have a kernel dependency.
>> I have investigated the technical reasons for using it, and the
>> only reason
>> I can find for using asmlib disks so far is asmlib is claimed (by
>> oracle) to
>> use lesser system resources, the slab kernel resources for using aio
>> (writing to asmlib meta devices is done synchronous (see the next
>> blog about
>> this), the kernel module writes asynchronous.
>
> Yes those same claims are the siren song that lured me to asmlib. As
> I said, we'll probably try a setup without asmlib when we get a chance
> in a few weeks. I just wondering (hoping?) that there might be a fix
> for my foul-up.
>
> --
> Don Seiler
> http://seilerwerks.wordpress.com
> ultimate: http://www.mufc.us
> --
> http://www.freelists.org/webpage/oracle-l
>
>

--
http://www.freelists.org/webpage/oracle-l