Re: ASM and disk partitions offset
- From: goran bogdanovic <goran00@xxxxxxxxx>
- To: cichomitiko@xxxxxxxxx
- Date: Sun, 4 Mar 2012 13:07:37 +0100
summarized:
misalignment may cause that physical I/O subsystem must execute more
single-block I/O calls than really necessary.
in order to eliminate possible performance penalty, it is better to align
Oracle blocks upon hardware device boundaries which can eliminate block
crossings completely by introducing an offset whose size is calculated to
ensure that Oracle block boundaries begin and end on stripe boundaries.
cheers,
goran
On Sun, Mar 4, 2012 at 12:57 PM, goran bogdanovic <goran00@xxxxxxxxx> wrote:
> Hi Dimitre,
>
> why (in general) offset i.e. aligning is relevant (or could be relevant)
> has been well explained by your fellow countryman ;-) Christo:
>
> http://www.pythian.com/news/411/aligning-asm-disks-on-linux/
>
> cheers,
> goran
>
>
> On Fri, Feb 17, 2012 at 12:21 AM, Radoulov, Dimitre <cichomitiko@xxxxxxxxx
> > wrote:
>
>> Thanks again!
>>
>> >> Cynical? Moi?
>>
>> Nooo :):):)
>>
>>
>> Best regards
>> Dimitre
>>
>> On 16/02/2012 23:32, Niall Litchfield wrote:
>> > Paul Drake points out there's a later version of the vmware article I
>> > reference at
>> > http://www.vmware.com/pdf/Perf_Best_Practices_vSphere4.1.pdf (it says
>> > the same thing as far as partition alignment goes though)
>> >
>> > On Thu, Feb 16, 2012 at 6:58 PM, Radoulov, Dimitre
>> > <cichomitiko@xxxxxxxxx <mailto:cichomitiko@xxxxxxxxx>> wrote:
>> >
>> >
>> > So thanks again Niall,
>> > now I'm reading the articles you mentioned.
>> >
>> >
>> > --
>> > Niall Litchfield
>> > Oracle DBA
>> > http://www.orawin.info
>>
>>
>>
>> --
>> //www.freelists.org/webpage/oracle-l
>>
>>
>>
>
--
//www.freelists.org/webpage/oracle-l
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