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Re: RAC nodes list?

From: Dan Norris <dannorris_at_dannorris.com>
Date: Fri, 3 Aug 2007 05:53:11 -0700 (PDT)
Message-ID: <486030.94111.qm@web35413.mail.mud.yahoo.com>

Hi Andrew,

I don't think it is possible to get the information you want from the database since Oracle doesn't know the hostnames for instances that aren't running. With RAC (I'm not talking about Clusterware), there are no database configurations that you would use to describe the list of hosts configured for a particular database. That configuration lies outside the database in the clusterware configuration (hence the OS commands offered in this thread). 

Put directly: The database doesn't know how many instances there are *supposed* to be nor on which hosts those instances may be started until it actually happens. All the database knows is that it only has X threads of redo, so only X instances can be started, but it doesn't care (or know) where those instances will be started (or if they'll ever be started).

So, if you want to find out which hosts are configured to run an instance of the ORCL database, you'll have to query the clusterware via the srvctl or crs_* commands.

Dan

----- Original Message ----
From: Andrew Kerber <andrew.kerber@gmail.com>
To: Jay.Caviness@mckesson.com
Cc: oracle-l <oracle-l@freelists.org>
Sent: Friday, August 3, 2007 7:20:05 AM
Subject: Re: RAC nodes list?

gv$instance only shows those nodes that are up.  I would like to
see both those are up and those that are supposed to be up.

On 8/2/07, Caviness, Jay A <Jay.Caviness@mckesson.com
> wrote:




You can look at gv$instance which will give you the host 
name for each instance currently on your cluster

 



Thanks,

Jay



Jay
Caviness                                            
Horizon Clinicals  Systems Engineering
Sr. Systems Engineer - Oracle 
DBA      McKesson Information Solutions
jay.caviness@mckesson.com                 
285 Century 
Place
303-926-2444                                          
Louisville, CO 80027

I gotta fever...and the only prescription for it is ... MORE 
COWBELL!

 



 




From: oracle-l-bounce@freelists.org 
[mailto:oracle-l-bounce@freelists.org] On Behalf Of Tim 
Gorman
Sent: Thursday, August 02, 2007 3:25 PM
To: 
oracle-l
Subject: Re: RAC nodes list?




Query V$THREAD.  It may not have all the information you want, 
but the rows are always there even if the instances aren't up...
Tim Gorman
consultant - Evergreen Database Technologies, Inc.
P.O. Box 1802, Evergreen CO  80437-1802
website = 
http://www.evdbt.com
email   = tim@evdbt.com
mobile  = +1-303-885-4526
fax     = +1-303-484-3608



Kerber, Andrew W. wrote: 

  
  

  
  Srvctl works within 
  sqlplus?

   

  I want to get the 
  information w/o going to the os. Someone suggested v$thread earlier, and that 
  will get me the instance names, but I would also like to get the server names 
  if possible.

   

  -----Original 
  Message-----
From: oracle-l-bounce@freelists.org
 
  [mailto:oracle-l-bounce@freelists.org] 
  On Behalf Of David 
  Sharples
Sent: Thursday, 
  August 02, 2007 1:31 PM
To: 
  andrew.kerber@gmail.com
Cc: oracle-l

Subject: Re: RAC nodes 
  list?

   

  use the srvctl 
  command

  
  On 02/08/07, 
  Andrew Kerber <andrew.kerber@gmail.com> 
  wrote: 

  Does anyone know what table or view will 
  show me what nodes and instances are supposed to be in a RAC Cluster, oracle 
  10.2.0.3?  gv$instance will give me the 
  instances that are currently up, but I would like to be able to query to find 
  out what instances and nodes are supposed to be in the cluster. 




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-- 
Andrew W. Kerber

'If at first you dont succeed, dont take up skydiving.'




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Received on Fri Aug 03 2007 - 07:53:11 CDT

Original text of this message

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