Re: Large ASM installation
- From: Andrew Kerber <andrew.kerber@xxxxxxxxx>
- To: Rui.Amaral@xxxxxxxxxxxxxxxx
- Date: Fri, 22 Oct 2010 11:40:58 -0500
Rui-
Can you expound a little on what happened to your disk headers? That sounds
strikingly similar to the problem we have had.
On Fri, Oct 22, 2010 at 10:40 AM, Amaral, Rui
<Rui.Amaral@xxxxxxxxxxxxxxxx>wrote:
> Hi Daniel,
>
> I have had several rac datawarehouses on asm (single asm instance) in the
> multi terabyte range (20 tb up to 90tb).
>
> Pros - easy to manage from a dba perspective (I did the installation myself
> - OS, cluster, ASM, db so for me it was a snap)
> - good performance
> - easy to use multiple arrays on the same asm instance (my 90tb one was
> spread over 2 arrays - an xp10k and XIV for instance - different speeds of
> the arrays would need to be taken into account for the physical db design of
> course)
>
> Cons - need to be aware of the 2 tb limit on individual luns
> - extra steps needed to taken on maintaining the luns (ie, take backups
> of the asm metadata regularly)
> - ideally on larger instances having a dedicated array to the asm is
> best (we had the large on go belly up because the san array was on a shared
> infrastructure and work being done for other systems had an impact on those
> luns - ie, some disk maintenance zeroed out the asm header on our luns even
> though that was not the system being worked on - or so oracle support told
> us).
>
> Would I use it again? Yes, since the performance and ease of use outweighed
> the cons for our situation. Besides, knowing the cons it would be easier to
> add processes to make sure we would be covered.
>
> HTH
>
> -----Original Message-----
> From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]
> On Behalf Of Daniel W. Fink
> Sent: Friday, October 22, 2010 10:10 AM
> To: oracle-l
> Subject: Large ASM installation
>
> We have a customer that is looking at ASM to handle their databases, the
> total planned is about 8TB for a single ASM instance. Has anyone on the
> list worked on a large (5+TB) ASM system? What have been the pros and
> cons versus a regular LVM and storage? If you had the chance to go back
> to the decision time, would you make the same decision and why?
>
> I'm not needing nitty gritty details right now, more of a high level
> decision making view.
>
> Regards,
> Daniel Fink
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--
Andrew W. Kerber
'If at first you dont succeed, dont take up skydiving.'
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