Subject: Re: oracle rac 10g and OS clusterware.
From: Peter McLarty <peter.mclarty@pacificdbms.com.au>
To: ujang.jaenudin@gmail.com
Cc: oracle-l@freelists.org
In-Reply-To: <3edcb66e0712041649p6bf3dd53pcea3341909ff84cc@mail.gmail.com>
References: <3edcb66e0712041649p6bf3dd53pcea3341909ff84cc@mail.gmail.com>
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Organization: Pacific DBMS Pty Ltd
Date: Wed, 05 Dec 2007 12:11:03 +1000
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Hi Ujang

Yes you need clusterware, this controls many behaviours of the RAC
cluster, it contains the OCR, it controls who gets evicted and forces
the reboots of those evicted nodes when that happens, ther are a numbe
of other important tasks that it also does.

If you have an OS cluster package like Vertitas then you need to have
clusterware and they link up to each other to mange the system as a
whole.

Yes you need a voting disk and OCR see above the OCR is part of
clusterware

The private network which is the cache interconnect is a requirement. If
this fails the clusterware determines the host or hosts that will stay
and be evicted in this failure. The network can be Ethernet, but check
the install guide for your platform to see what is required.  

HTH

Cheers

--
Peter McLarty <peter.mclarty@pacificdbms.com.au>
Pacific DBMS Pty Ltd


On Wed, 2007-12-05 at 07:49 +0700, Ujang Jaenudin wrote:

> all,
> 
> according to ML Note:220970.1 that whether use OS cluster or not, we
> must install oracle clusterware for 10g RAC.
> what I need other information are:
> 1 . is it same the behavior between 10g rac which use OS cluster and
> by purely oracle clusterware ?
>      I mean the node eviction behavior....
> 2. DO I need OCR and voting disk??
> 3. is it network heartbeat (private network) still mandatory? and
> should use ethernet??
> 
> thanks for your sharing.............
> 


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Hi Ujang<BR>
<BR>
Yes you need clusterware, this controls many behaviours of the RAC cluster, it contains the OCR, it controls who gets evicted and forces the reboots of those evicted nodes when that happens, ther are a numbe of other important tasks that it also does.<BR>
<BR>
If you have an OS cluster package like Vertitas then you need to have clusterware and they link up to each other to mange the system as a whole.<BR>
<BR>
Yes you need a voting disk and OCR see above the OCR is part of clusterware<BR>
<BR>
The private network which is the cache interconnect is a requirement. If this fails the clusterware determines the host or hosts that will stay and be evicted in this failure. The network can be Ethernet, but check the install guide for your platform to see what is required.&nbsp; <BR>
<BR>
HTH<BR>
<BR>
Cheers<BR>
<BR>
--<BR>
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Peter McLarty &lt;<A HREF="mailto:peter.mclarty@pacificdbms.com.au">peter.mclarty@pacificdbms.com.au</A>&gt;<BR>
Pacific DBMS Pty Ltd
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On Wed, 2007-12-05 at 07:49 +0700, Ujang Jaenudin wrote:
<BLOCKQUOTE TYPE=CITE>
<PRE>
<FONT COLOR="#000000">all,</FONT>

<FONT COLOR="#000000">according to ML Note:220970.1 that whether use OS cluster or not, we</FONT>
<FONT COLOR="#000000">must install oracle clusterware for 10g RAC.</FONT>
<FONT COLOR="#000000">what I need other information are:</FONT>
<FONT COLOR="#000000">1 . is it same the behavior between 10g rac which use OS cluster and</FONT>
<FONT COLOR="#000000">by purely oracle clusterware ?</FONT>
<FONT COLOR="#000000">     I mean the node eviction behavior....</FONT>
<FONT COLOR="#000000">2. DO I need OCR and voting disk??</FONT>
<FONT COLOR="#000000">3. is it network heartbeat (private network) still mandatory? and</FONT>
<FONT COLOR="#000000">should use ethernet??</FONT>

<FONT COLOR="#000000">thanks for your sharing.............</FONT>

</PRE>
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