RE: Oracle Supported RAC Configuration

From: Kevin Closson <kevinc_at_polyserve.com>
Date: Mon, 5 Jun 2006 13:09:54 -0700
Message-ID: <5D2570CAFC98974F9B6A759D1C74BAD0E5A6A8@ex2.ms.polyserve.com>

let us see the ocssd.log files. That will tell us why Oracle pulled the ATONTRI trick  

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	From: Freeman, Donald [mailto:dofreeman_at_state.pa.us] 
	Sent: Monday, June 05, 2006 12:40 PM
	To: Matthew Zito; Freeman, Donald; kevinc_at_polyserve.com;
oracle-l_at_freelists.org
	Subject: RE: Oracle Supported RAC Configuration
	
	
	We only have two nodes.  I know that you need a VLAN if you are

going to use more nodes. And, of course the network guys say there is no evidence of any switch failure at the time of the evictions. I am having to answer questions on this today....the other guy is off.

		-----Original Message-----
		From: Matthew Zito [mailto:mzito_at_gridapp.com] 
		Sent: Monday, June 05, 2006 3:26 PM
		To: dofreeman_at_state.pa.us; kevinc_at_polyserve.com;
oracle-l_at_freelists.org
		Subject: RE: Oracle Supported RAC Configuration
		
		
		If I may bridge the gap - Donald is referring to the

ethernet switch, Kevin is referring to Fibre Channel. FWIW, oracle doesn't require a dedicated switch for the interconnect, and in fact, its better to cable the interconnects into both of your core switches and just dedicate a VLAN to the interconnect. However, its rarely the network that actually causes the node evictions, despite Oracle's tendency to point the finger there. If you're really looking towards that, you could do a tcpdump of the interconnect interfaces and drop it into Ethereal and dig into the network packets (or have your network engineer do it).                  

                Matt

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                From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Freeman, Donald

		Sent: Monday, June 05, 2006 3:20 PM
		To: kevinc_at_polyserve.com; oracle-l_at_freelists.org
		Subject: RE: Oracle Supported RAC Configuration
		
		
		Ah...you noticed my imprecise language....I'm the

alternate DBA for this system. I don't normally work on RAC. I'm talking about Node 1 kicking Node 2 out of the cluster.

			-----Original Message-----
			From: oracle-l-bounce_at_freelists.org


[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Kevin Closson

			Sent: Monday, June 05, 2006 2:36 PM
			To: oracle-l_at_freelists.org
			Subject: RE: Oracle Supported RAC Configuration
			
			
			You can use a zoned switch.  What is an

"eviction" in your terminology?

---

                                From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Freeman, Donald

				Sent: Monday, June 05, 2006 11:26 AM
				To: oracle-l_at_freelists.org
				Subject: Oracle Supported RAC

Configuration                                                                  

                                We are having an argument with our CoLo facility over the issue of a dedicated switch for our RAC interconnect. We are saying it's an Oracle requirement and Oracle does not support any other configuration. Of course, I can't find any Metalink source for that requirement. I can't think up any more wild combinations of search terms that will bring me back any fewer than 10k docs. Does anybody have any reference for this "requirement?" We are experiencing periodic evictions from the cluster and wanted to eliminate network issues from our considerations.

				Don Freeman 
				Database Administrator 1 
				Bureau of Information Technology 
				Pennsylvania Department of Health 
				(717) 703-5782 

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Received on Mon Jun 05 2006 - 15:09:54 CDT