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

________________________________

From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Freeman, Donald
Sent: Monday, June 05, 2006 3:20 PM
To: kevinc@xxxxxxxxxxxxx; oracle-l@xxxxxxxxxxxxx
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@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Kevin Closson
        Sent: Monday, June 05, 2006 2:36 PM
        To: oracle-l@xxxxxxxxxxxxx
        Subject: RE: Oracle Supported RAC Configuration
        
        
        You can use a zoned switch.  What is an "eviction" in your
terminology?


________________________________

                From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Freeman, Donald
                Sent: Monday, June 05, 2006 11:26 AM
                To: oracle-l@xxxxxxxxxxxxx
                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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