Re: ASM Record Deletions

  • From: Sanjay Mishra <smishra_97@xxxxxxxxx>
  • To: gorbyx@xxxxxxxxx
  • Date: Thu, 15 Jun 2006 13:29:11 -0700 (PDT)

Alex
   
  thanks for the information. I will send the slide itself to you as I don't 
have the link. Is there any way I can get the information outside the database 
like from CSS temp file that it is maintaining this information as long as both 
ASM and associated database is running.
   
  Sanjay

Alex Gorbachev <gorbyx@xxxxxxxxx> wrote:
  ASM will see all disks that match asm_disk_string init.ora parameter
of ASM. On all nodes. So you can use this parameter to control which
disks every node sees.

Now, you can mount or unmoung diskgroup using ALTER DISKGROUP 
MOUNT/DISMOUNT;

ASM_DISKGROUPS init.ora parameter controls which disk groups are
mounted at startup. It also used to mount umount disks using ALTER
DISKGROUP ALL MOUNT/DISMOUNT.

Note that ALTER DISKGROUP MOUNT/DISMOUNT with specific diskgroup
name modifies this parameter in spfile if you have one.

Now regarding CSS. In my understanding it has nothing to do with
association of diskgroup to ASM instance. As I mentioned this is
controlled by you or ASM instance at startup base on init.ora
parameter ASM_DISKGROUPS. What CSS is tracking is association between
database instance and ASM instance that it's connected to.

If you have the link to the presentation - please share. I would like
to see it - maybe my understanding is incorrect.

2006/6/15, Sanjay Mishra :
>
> Kevin
>
> If I have 3 Node RAC and is it possible that I can have 2 node using DG1 and
> DG2 disk group while third node can have three Disk group DG1, DG2 and DG3.
> Actually I want to use node 3 for one different application comparision to
> Node1 and Node2 and so want to use seprate Disk group.
>
> I was in IOUG and have seen one presentation where they have shown it. They
> also mention that group services maintainted the DG+asm mapping. I know CSS
> is maintaining this information but is it possible to check the group
> services information outside of Database.
>
> TIA
>
> Sanjay
>
>
>
>
> Kevin Closson wrote:
>
> no problem...just the tip of the ASM misunderstanding iceburg
> out there...and that is no reflection on you...it is rampant
>
>
>
> ________________________________
> From: Sanjay Mishra [mailto:smishra_97@xxxxxxxxx]
> Sent: Tuesday, June 13, 2006 5:49 PM
> To: kevinc@xxxxxxxxxxxxx; oracle-l@xxxxxxxxxxxxx
> Subject: RE: ASM Record Deletions
>
>
>
> Thanks Kevin for nice catch
>
> .com
>
>
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-- 
Best regards,
Alex Gorbachev

http://blog.oracloid.com
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