Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Usenet -> c.d.o.server -> Re: single node RAC system?

Re: single node RAC system?

From: DA Morgan <damorgan_at_psoug.org>
Date: Tue, 29 May 2007 08:39:53 -0700
Message-ID: <1180453192.634751@bubbleator.drizzle.com>


herta wrote:

> On May 26, 2:25 am, DA Morgan <damor..._at_psoug.org> wrote:

>> herta wrote:
>>> We are currently setting up our disaster recovery site (DRS).
>>> For Oracle, we want to use Dataguard to copy our databases to physical
>>> standby databases on a single system at the DRS.
>>> The single system is quite capable of running the Dataguard load, but
>>> should we need to run production at the DSR, it will not suffice. We
>>> would therefore like to set up this system as single node cluster, so
>>> that we can easily add instances if necessary.
>>> I tried installing clusterware on a single node, but the start of ONS
>>> fails with:
>>> Start of `ora.l27.ons` on member `l27` failed.
>>> CRS-1006: No more members to consider
>>> CRS-0215: Could not start resource 'ora.l27.ons'.
>>> Metalink article 2411114.1 suggests that the set up is possible,
>>> though the environment described there differs from ours (we use
>>> 64-bit SLES 10, Oracle RAC 10.2.0.3, ASM).
>>> It also warns that "this configuration is not certified or supported
>>> by Oracle Support Services".
>>> Has anyone tried setting up a single node cluster? If so, did you get
>>> the ONS error? How did you work around it?
>>> As to the support status, in theory, we could set up a two node
>>> cluster, and then take one node down. How would that differ from a
>>> single node cluster configuration?
>>> Alternative suggestions to achieve our goals are also welcome, of
>>> course.
>>> FWIIW, I opened an SR with Oracle four days ago, but they have yet to
>>> respond with something other than "we're looking into it'. A previous
>>> posting in ORACLE_DBA_EXPERTS also remained unanswered.
>>> I'm sort of pressed for time as the goal is to ship this to the DRS in
>>> three
>>> weeks time, and just getting a first copy of the physical databases on
>>> the storage is going to take a while.
>>> Kind regards,
>>> Herta
>> Build a two-node cluster and then shut down one machine.
>>
>> Suggestions that you use VMWare will result in an unsupported environment.
>> --
>> Daniel A. Morgan
>> University of Washington
>> damor..._at_x.washington.edu
>> (replace x with u to respond)
>> Puget Sound Oracle Users Groupwww.psoug.org
> 
> Thanks, Daniel.    We're considering this, using a test system as our
> second member, but we're wondering what impact this would have when
> we'd need to upgrade the software.  (We cannot ship the test system to
> the DR site.)  Has anyone actually done this?
> 
> Kind regards,
> 
> Herta

We just got done doing this for a public company where they are doing Data Guard from RAC cluster to single instance but want the ability to quickly turn that single instance into a cluster by adding nodes.

-- 
Daniel A. Morgan
University of Washington
damorgan_at_x.washington.edu
(replace x with u to respond)
Puget Sound Oracle Users Group
www.psoug.org
Received on Tue May 29 2007 - 10:39:53 CDT

Original text of this message

HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US