Re: RAC node distance
- From: Michael Elkin <melkin4u@xxxxxxxxx>
- To: mzito@xxxxxxxxxxx
- Date: Mon, 5 Apr 2010 10:15:52 +0300
3d voting disk can be located on NFS (This is supported by Oracle since 10.2
version)
More details can be found below:
http://www.oracle.com/technology/products/database/clustering/pdf/thirdvoteonnfs.pdf
In a past Oracle used "dark fiber" technology for extended RAC solution but
it was very expensive, is "stretched cluster" just a new term for the same
thing or we are talking about different technical approach ?
Michael
On Sat, Apr 3, 2010 at 4:16 AM, Matthew Zito <mzito@xxxxxxxxxxx> wrote:
>
> Where do you put your third voting disk?
>
> Matt
>
> --
> Matthew Zito
> Chief Scientist
> GridApp Systems
> P: 646-452-4090
> mzito@xxxxxxxxxxx
> http://www.gridapp.com
>
>
>
>
> -----Original Message-----
> From: oracle-l-bounce@xxxxxxxxxxxxx on behalf of Tyfanie Wineriter
> Sent: Fri 4/2/2010 7:29 PM
> To: 'ORACLE-L'
> Subject: RE: RAC node distance
>
> I'm really not sure why everyone is responding that this would be an "odd
> request." We are running a stretch rac with about 4 blocks in between our
> rac servers, and it's running great. We do have a SAN with 2 storage
> servers (one at each site, of course).. we run them with great load
> balancing, no interconnect issues. It's a great answer for DR questions
> like "What if one building has a tree fall on it" or "What happens if the
> networks to one building gets chopped by a chainsaw" or even "What happens
> if one center gets flooded".
>
>
>
> I guess it depends on what your DR quest really is.
>
>
>
>
>
> ~ Tyfanie Wineriter ~
>
>
>
> Database Administrator
>
> University of Oregon
>
> 1212 University of Oregon
>
> Eugene, OR 97402-1212
>
> (541) 346-1366
>
>
>
> From: oracle-l-bounce@xxxxxxxxxxxxx
> [mailto:oracle-l-bounce@xxxxxxxxxxxxx<oracle-l-bounce@xxxxxxxxxxxxx>
> ]
> On Behalf Of Ram Raman
> Sent: Wednesday, March 24, 2010 8:21 PM
> To: ORACLE-L
> Subject: RAC node distance
>
>
>
> Hi
>
>
>
> We have a 2 node RAC for one of our new applications. There are 2 sets of
> application/web servers; each set located on different building separated
> by
> about 3 city blocks. But, both the RAC nodes are in one of the buildings.
> The management seemed to be inclined to want to separate them in different
> buildings. To me that does not sound like a great idea, with interconnect
> traffic and such. Questions:
>
>
>
> 1) Are there any sites that use RAC 'geo-cluster' mode?
>
>
>
> 2) Would running the RAC in 'active-passive' mode help in case of geo
> cluster type solution? What kind of interconnect is used by sites that have
> geo cluster type RACs?
>
>
>
> PS. I am aware that RAC is not a DR solution, going for a dataguard would
> be
> a good DR solution.
>
>
>
> Ram.
>
>
>
>
>
>
>
--
Best Regards
Michael Elkin
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