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Re: Active/Passive "high availability"

From: dd yakkali <>
Date: Fri, 13 Apr 2007 15:08:03 -0400
Message-ID: <>


we just put a similar sytem into a test phase

Here is our setup

2 Sun fire v240
Hitachi SAN, presented 3 LUNS to both the servers, installed oracle on both nodes.
Oracle and Solaris 10
created a filesystem /ora_data ( could have used raw as well, raw is better from corruption issues stand point)
I had put all the datafiles on the file system.

my initxxx.ora contains spfile=/ora_data/xxx/spfilexxx.ora

I configured remote_listener=tnsentry which points to another hosts listener. I run listener on both nodes

clients will have a tnsentry with both ipaddresses inthem. when ever a node goes down, clients will make a connection to surviving node with out changing any thing. The only manually step is to bring up the instance on the other node.

We did some preliminary tests and seemed to be working fine. I copied the password file across and we do not change password file contents frequently, so that is not an issue.


On 4/11/07, Schauss, Peter <> wrote:
> My manager is proposing to cluster two Solaris 5.9 servers in order to
> create a "high availability" solution. At this stage he is a bit
> unclear as to what software he would be using for the cluster, but he
> does not envision purchasing any additional licenses from Oracle. Our
> Oracle version is
> His idea is to have an Oracle instance running on one box and a second
> Oracle home on the second box, but not running. In the event of a
> failure on the active box, we would start the Oracle instance on the
> other one to minimize down time.
> Aside from my questions about what this configuration actually
> accomplishes, my concerns would be:
> - Assuming that all of the data files are on the shared disk, would
> this approach actually work?
> - The password file is normally stored in $ORACLE_HOME/dbs. If we have
> two of them do they need to be synchronized? Is there anything else in
> the dbs directory which needs to be synchronized?
> - Would we risk corrupting our data if we accidentally started the
> second instance?
> - Are there any Oracle licensing issues?
> Thanks,
> Peter Schauss
> --

Received on Fri Apr 13 2007 - 14:08:03 CDT

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