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