Re: Diff between 11gR2 RAC on one node and Cold failover cluster
- From: hrishy <hrishys@xxxxxxxxxxx>
- To: jason.arneil@xxxxxxxxx
- Date: Thu, 12 Nov 2009 06:34:08 +0000 (GMT)
Hi Jason
Thanks for the reply and verifying my understanding.
Is single insatnce cold failover cluster supported by Oracle ?
Reason i am asking this is there might be a need for me to present and justify
the need for replacing Vertias/IBM HACMP kind of cluster with Oracle
Clusterware.
regards
--- On Wed, 11/11/09, jason arneil <jason.arneil@xxxxxxxxx> wrote:
From: jason arneil <jason.arneil@xxxxxxxxx>
Subject: Re: Diff between 11gR2 RAC on one node and Cold failover cluster
To: hrishys@xxxxxxxxxxx
Cc: oracle-l@xxxxxxxxxxxxx
Date: Wednesday, 11 November, 2009, 9:35
Hello,
I think your understanding is broadly correct, the database must not have the
RAC option installed it has to be single instance so you only license one of
the nodes.
The RAC One Node option does include additional features that are not available
to Single instance databases that are protected via clusterware cold failover.
In particular the online rolling upgrades of the oracle homes of effectively a
single instance database with Rac One Node may be quite attractive.
Also being able to migrate to another machine online seems like a pretty neat
feature - heard that described as Omotion, hmm can't think which virtualisation
technology companies lunch they are trying to eat there.
It seems to me that it would sit in an availability/cost space between a single
instance database and having to license multiple machines.
jason.
--
http://jarneil.wordpress.com
2009/11/11 hrishy <hrishys@xxxxxxxxxxx>
Hi
I am trying to understand the difference between 11gR2 RAC on one node and Cold
failover cluster .
The OTN whitepaper on cold failover cluster by Philip Newlan says that
clusterware can be used to protect a single instance oracle database.
This implies there is no additional liscensing costs if we have already brought
Oracle EE .
But the paper also adds a warning that oracle will not support cold failover
cluster so i am in a kind of dilemma.
On the other hand RAC on one node is a extra cost option as i understand it on
top of EE.
My question then is
a)Is my understanding above correct
b)Anybody out there using cold failover cluster.
regards
Hrishikesh
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