RE: Oracle Supported RAC Configuration

From: Matthew Zito <mzito_at_gridapp.com>
Date: Mon, 5 Jun 2006 15:26:03 -0400
Message-ID: <C0A5E31718FC064A91E9FD7BE2F081B1563021@exchange.gridapp.com>

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

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 - 14:26:03 CDT