Re: ASM and EMC PowerPath

From: Karl Arao <karlarao@xxxxxxxxx>
To: oracle-l@xxxxxxxxxxxxx
Date: Wed, 20 Apr 2011 22:16:38 +0800

Forwarding to this thread the reply from Matthew Zito.


On Fri, Apr 15, 2011 at 10:00 PM, Zito, Matthew <Matt_Zito@xxxxxxx> wrote:

>
> Hey guys,
>
> I haven't gotten this email address straightened out on Oracle-L yet, but I
> figured I'd drop you a note, and you could forward it on to the list if you
> cared to.
>
> The doc you read is correct, powerpath will cheerfully work with any of the
> devices you send IOs to, because the kernel driver intercepts requests for
> all devices and routes them through itself before dishing them down the
> appropriate path.
>
> However, setting scandisks to the emcpower has the administrative benefits
> of making sure the disks don't show up twice.  However, even if ASM picks
> the first of the two disks, it will still be load-balanced successfully.
>
> Thanks,
> Matt Zito
> (former EMC solutions architect)
> ________________________________________
> From: oracle-l-bounce@xxxxxxxxxxxxx [oracle-l-bounce@xxxxxxxxxxxxx] On
> Behalf Of Radoulov, Dimitre [cichomitiko@xxxxxxxxx]
> Sent: Friday, April 15, 2011 9:21 AM
> To: Karl Arao
> Cc: ORACLE-L
> Subject: Re: ASM and EMC PowerPath
>
> Hi Karl,
> thanks!
>
> Unfortunately I'm not able to run such a test, at least not for now.
>
> So please let me/us know, if/when you have updates on this from the EMC
> support.
>
>
> Best regards
> Dimitre
>
>
> On 14/04/2011 19:01, Karl Arao wrote:
> Hi Dimitre,
>
> I'm also curious about that.. especially on this
>
> "Unlike most multipath drivers, PowerPath will support full multipath
> capabilites even with the regular names. PowerPath and ASMLib now work
> together successfully."
>
> so I asked some friends from EMC. So we are still waiting for the EMC
> support for their answer.
>
> But for a really definitive answer.. if you have a test or r&d environment
> you can unplug the storage cable connection and see if the fail-over works
> even if there's no scanorder or scanexclude. And if this does not work, it
> will be just a simple configuration file change and restart of the nodes.
>
>
> --
> Karl Arao
> karlarao.wordpress.com<http://karlarao.wordpress.com>
> karlarao.tiddlyspot.com<http://karlarao.tiddlyspot.com>
>
>


-- 
Karl Arao
karlarao.wordpress.com
karlarao.tiddlyspot.com

References:
- ASM and EMC PowerPath
  - From: Radoulov, Dimitre
- Re: ASM and EMC PowerPath
  - From: Karl Arao
- Re: ASM and EMC PowerPath
  - From: Radoulov, Dimitre
- Re: ASM and EMC PowerPath
  - From: Karl Arao
- Re: ASM and EMC PowerPath
  - From: Radoulov, Dimitre
- Re: ASM and EMC PowerPath
  - From: Karl Arao
- Re: ASM and EMC PowerPath
  - From: Radoulov, Dimitre
- Re: ASM and EMC PowerPath
  - From: Karl Arao
- Re: ASM and EMC PowerPath
  - From: Radoulov, Dimitre

Re: ASM and EMC PowerPath

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