RE: Oracle Supported RAC Configuration
- From: "Kevin Closson" <kevinc@xxxxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Mon, 5 Jun 2006 13:09:54 -0700
let us see the ocssd.log files. That will tell us why Oracle pulled the
ATONTRI trick
________________________________
From: Freeman, Donald [mailto:dofreeman@xxxxxxxxxxx]
Sent: Monday, June 05, 2006 12:40 PM
To: Matthew Zito; Freeman, Donald; kevinc@xxxxxxxxxxxxx;
oracle-l@xxxxxxxxxxxxx
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@xxxxxxxxxxx]
Sent: Monday, June 05, 2006 3:26 PM
To: dofreeman@xxxxxxxxxxx; kevinc@xxxxxxxxxxxxx;
oracle-l@xxxxxxxxxxxxx
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
________________________________
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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