Re: EBS & ASM best practices and suggestions
- From: Yury Velikanov <j.velikanovs@xxxxxxxxx>
- To: ora-apps-dba@xxxxxxxxxxxxx
- Date: Wed, 18 Nov 2009 00:40:44 +1100
> I kinda dislike the absence of "fsck like" tools for ASM, and the lack of
> backup superblocks, not sure if this changed in 11g.
It is there now with new ASM Volume Manager and ASM Cluster File
system :) However you don't need it for DB files any way.
There are other methods checking Oracle DB files integrity.
> Aside from that I feel it is a killer product. Similar functionality with
> cluster filesystems cost hundreds of thousands of dollars, except in the case
> you go for OCFS2, and that is available for linux only.
Not sure what do you mean by "cost hundreds of thousands of dollars"
as ASM is for free. It doesn't cot you anything (You have Oracle DB
licenses anyway ;)
Yury
On Wed, Nov 18, 2009 at 12:35 AM, Luis Freitas <lfreitas34@xxxxxxxxx> wrote:
> Yuri,
>
> I kinda dislike the absence of "fsck like" tools for ASM, and the lack of
> backup superblocks, not sure if this changed in 11g.
>
> Aside from that I feel it is a killer product. Similar functionality with
> cluster filesystems cost hundreds of thousands of dollars, except in the case
> you go for OCFS2, and that is available for linux only.
>
> Best Regards,
> Luis Freitas
>
> --- On Tue, 11/17/09, Yury Velikanov <j.velikanovs@xxxxxxxxx> wrote:
>
>> From: Yury Velikanov <j.velikanovs@xxxxxxxxx>
>> Subject: EBS & ASM best practices and suggestions
>> To: ora-apps-dba@xxxxxxxxxxxxx
>> Date: Tuesday, November 17, 2009, 10:50 AM
>> Hello Pravin,
>>
>> If you are planning to run EBS in RAC configuration what
>> possible options do you have for Storing DB files ?
>> RAW devices (block devices) - Best DB IO performance -
>> Manageability is rubbish
>> Cluster FS - rubbish performance / technical complexity /
>> costs - Good Manageability
>>
>> ASM - Best DB IO performance - Good Manageability -
>> Mirroring/Striping out of the box - Mainstream today &
>> Oracle Future (11GR2 introduced ACFS - ASM Cluster File
>> System)
>>
>> From my point of view you do not have other options :)
>>
>> End of the day ASM isn't a rocket since. It is a very
>> simple product covering very simple operations (files extent
>> map synchronization)
>>
>> If you have any questions on doubts please do not hesitate
>> to share those with us.
>>
>>
>> PS ASM topic is kind of HOT for me now as I just delivered
>> the following paper during annual Australian User Group
>> Automatic Storage Management
>> - 11G
>> R2 features for mission critical systems
>>
>> All the best with your projects,
>> Yury
>>
>>
>> On Mon, Nov 16, 2009 at 5:30 PM, Pravin RC <pravinrc@xxxxxxxxx>
>> wrote:
>>
>> Guys,
>>
>> Sorry this is not ASM thread, but i want to discuss
>> the use and experience of ASM.
>>
>> I am in design phase we will have 2 node RAC and ASM(
>> best practise and MAA). i am bit skiptical on use of ASM as
>> it is adding additional maintenance of ASM instances on
>> each node. And again copying files into and from will be
>> another challenge. Guys could you please discuss your your
>> experience on ASM use.
>>
>>
>>
>> thanks
>>
>> Pravin
>>
>>
>>
>>
>>
>
>
>
>
>
--
Yury
Oracle Certified Master
Mobile number: +61 405728926
============================================
http://otn.oracle.com/ocm/jvelikanovs.html
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