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Home -> Community -> Mailing Lists -> Oracle-L -> RE: RAC nodes
Oh, totally agree! But there is publicly available information out there o=
n how to do this:
http://h71028.www7.hp.com/enterprise/downloads/Ext_RAC_cluster_100803.pdf http://www.veritas.com/Products/van?c=3Dproduct&refId=3D20#wp http://www.sun.com/solutions/blueprints/1102/817-0369.pdf
I think there was a presentation done at UKOUG on Comic Relief's 8 km stret= ch cluster, but I don't have an external link to that one.
Having said all of that (which wasn't really much), I still am not convince= d that geoclusters provide a better form of disaster recovery to things lik= e DataGuard. I suppose it boils down to the standard old line - just becau= se you CAN do something with specific technology doesn't mean you SHOULD do=it.
=
Pete
=
"Controlling developers is like herding cats."
Kevin Loney, Oracle DBA Handbook
=
"Oh no, it's not. It's much harder than that!" Bruce Pihlamae, long-term Oracle DBA
-----Original Message-----
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] =
On Behalf Of Mercadante, Thomas F
Sent: Friday, 16 July 2004 9:37 PM
To: 'oracle-l_at_freelists.org'
Subject: RE: RAC nodes
Pete,
You have to admit the "Getting it to work" and what is supported are two different things.
But I agree that the information I have is dated, and may be wrong - that i=
s
why I stated it the way I did. And I was hoping for better info from this
list.
Bruce Reardon mentioned Vax clusters doing some of this. I would expect nothing else from Vax. They pioneered clusters long before Oracle folks even thought about needing it.
Thanks for the info.
Tom Mercadante
Oracle Certified Professional
-----Original Message-----
From: Pete Sharman [mailto:peter.sharman_at_oracle.com] =
Sent: Thursday, July 15, 2004 5:45 PM
To: oracle-l_at_freelists.org
Cc: Peter Ross Sharman
Subject: RE: RAC nodes
Then your rep needs more knowledge. RAC works with geoclusters as well. D=
=3D
epending on the clustering technology, clusters can now have nodes 10's of =
=3D
kilometres apart. I know some of my colleagues got it to work on two lapto=
=3D
ps separated by 300 km or so in England using the internal Oracle network. =
=3D
Obviously not a production configuration though! :)
=3D
Pete
=3D
"Controlling developers is like herding cats."
Kevin Loney, Oracle DBA Handbook
=3D
"Oh no, it's not. It's much harder than that!" Bruce Pihlamae, long-term Oracle DBA
-----Original Message-----
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] =
=3D
On Behalf Of Mercadante, Thomas F
Sent: Friday, 16 July 2004 3:32 AM
To: 'oracle-l_at_freelists.org'
Subject: RE: RAC nodes
Carol,
One of the biggest challenges you are going to have is, as someone else mentioned, sharing disk over the large geographical location. Last I spoke= =3D
with an Oracle rep, this had only been done over a short distance - like a couple of hundred yards. Seems unbelievable to me that this *can't* be done, but it's what I've been told.
So someone in your organization needs to solve that problem first. If it does not exist, then you are stuck with either replication, or one database= =3D
server shared by all.
Tom Mercadante
Oracle Certified Professional
-----Original Message-----
From: Carol Legros [mailto:clegros_at_orsis.ca] =3D
Sent: Thursday, July 15, 2004 2:24 PM
To: oracle-l_at_freelists.org
Subject: Re: RAC nodes
Raj,
I recently spoke with someone that is considering putting in RAC in this =3D=
configuration.
We don't know of anyone that *has* done this, and on the flip side, we =3D
couldn't think of any other
reasons this solution might be problematic except for the network.
I'd like to hear about similar RAC experiences (servers split over =3D
geographic locations)
from others on the list if they have tried it. =3D
Carol
Raj Jamadagni wrote:
>Other than network latency and other outages, what more do you _want_ =3D
>??
>
>Raj
>
>--- Carol Legros <clegros_at_orsis.ca> wrote:
> =3D
>
>>I'm wondering if anyone out there that is using RAC has set up their =3D
>>nodes such that half of the nodes reside in one geographic location =3D
>>and the other half of their nodes in another geographic location (ie =3D
>>100 miles away).
>>
>>I can envision possible issues with network latency or outages, but =3D
>>I'm
>>wondering
>>what other problems/issues others may have found if/when they tried =
>>such =3D
a
>>configuration.
>>
>>Cheers
>>Carol
>>
>>
>>
>>
>>
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>>
>
>
>=3D3D=3D3D=3D3D=3D3D=3D3D
>Best Regards
>Raj
>---------------------------------------------------------
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