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

Home -> Community -> Mailing Lists -> Oracle-L -> Re: Multiple Instances and 9iRAC

Re: Multiple Instances and 9iRAC

From: Arup Nanda <orarup_at_hotmail.com>
Date: Fri, 14 Mar 2003 11:19:49 -0800
Message-ID: <F001.0056AA12.20030314111949@fatcity.com>


Todd,

RAC is a multi-instance database. If you have n nodes in a cluster then you generally have (although not necessarily that many) n instances accessing the same database. When you mention 3 or more Oracle instances, perhaps you mean 3 or more "databases" each in a separate cluster of 4 to 8 nodes each.

Interconnect plays a very important role in performance in this case and depends heavily on the hardware you decide on. For instance if you use Tru64 Clusters on Compaq alphas, you would probably go for Memory channels as interconnect; but for HP clusters you will lean towards CLIC interface.

The environment you mentioned is not just viable, but that's exactly how it is done.

HTH. Arup Nanda

  My company is currently considering using Oracle 9i RAC. One of the proposed environments is to have multiple oracle instances (3 or more) configured on a 4-8 node RAC cluster. Does anyone have any insights as to the viability of this implementation? Will the high speed inter connect be able to handle the traffic from multiple instances? I always thought of RAC as a single instance implementation with each instance needing its own cluster...........

--

Please see the official ORACLE-L FAQ: http://www.orafaq.net
--

Author: Arup Nanda
  INET: orarup_at_hotmail.com

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). Received on Fri Mar 14 2003 - 13:19:49 CST

Original text of this message

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