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Date: Wed, 11 Nov 2009 09:35:14 +0000
Message-ID: <fda4898f0911110135x3fcd0fb2sc96d7efdedb0a5e1@mail.gmail.com>
Subject: Re: Diff between 11gR2 RAC on one node and Cold failover cluster
From: jason arneil <jason.arneil@gmail.com>
To: hrishys@yahoo.co.uk
Cc: oracle-l@freelists.org
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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@yahoo.co.uk>

> 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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Hello,<div><br></div><div>I think your understanding is broadly correct, th=
e database must not have the RAC option installed it has to be single insta=
nce so you only license one of the nodes.</div><div><br></div><div>The RAC =
One Node option does include additional features that are not available to =
Single instance databases that are protected via clusterware cold failover.=
</div>
<div><br></div><div>In particular the online rolling upgrades of the oracle=
 homes of effectively a single instance database with Rac One Node may be q=
uite attractive.=A0</div><div><br></div><div>Also being able to migrate to =
another machine online seems like a pretty neat feature - heard that descri=
bed as Omotion, hmm can&#39;t think which virtualisation technology compani=
es lunch they are trying to eat there.</div>
<div><br></div><div>It seems to me that it would sit in an availability/cos=
t space between a single instance database and having to license multiple m=
achines.</div><div><br></div><div>jason.=A0</div><div><br clear=3D"all">--<=
br>
<a href=3D"http://jarneil.wordpress.com">http://jarneil.wordpress.com</a><b=
r>
<br><br><div class=3D"gmail_quote">2009/11/11 hrishy <span dir=3D"ltr">&lt;=
<a href=3D"mailto:hrishys@yahoo.co.uk">hrishys@yahoo.co.uk</a>&gt;</span><b=
r><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:=
1px #ccc solid;padding-left:1ex;">
<table cellspacing=3D"0" cellpadding=3D"0" border=3D"0"><tbody><tr><td vali=
gn=3D"top" style=3D"font:inherit"><div>Hi</div>
<div>=A0</div>
<div>I am trying to understand the difference between 11gR2 RAC on one node=
 and Cold failover cluster .</div>
<div>=A0</div>
<div>The OTN whitepaper on cold failover cluster by Philip Newlan says that=
 clusterware can be used to protect a single instance oracle database.</div=
>
<div>=A0</div>
<div>This implies there is no additional liscensing costs if we have alread=
y brought Oracle EE .</div>
<div>But the paper also adds a warning that=A0oracle will not support cold =
failover cluster so i am in a kind of dilemma.</div>
<div>=A0</div>
<div>On the other hand RAC on one node is a extra cost option as i understa=
nd it on top of EE.</div>
<div>=A0</div>
<div>My question then is</div>
<div>a)Is my understanding above correct</div>
<div>b)Anybody out there using cold failover cluster.</div>
<div>=A0</div>
<div>regards</div>
<div>Hrishikesh</div>
<div>=A0</div>
<div>=A0</div>
<div>=A0</div></td></tr></tbody></table><br>


      </blockquote></div><br></div>

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