How do you establish high availability concepts in the Oracle Application Server?

High availability is defined by the percentage of time that your server works normally.

You can use hardware cluster for failover to build High availability.

Hardware cluster is a collection of loosely coupled computers where a load balancer

provides a single view of services.

Failover is a process to relocate an application from failed node to a standby node.

You can install as many redundant infrastructures in many servers.

You can install as many J2EE and Web Cache Middle-Tier instance.

How can you create a J2EE and Web Cache Cluster?

Assuming you have two J2EE and web caches installed.

$ORACLE_HOME/webcache1

$ORACLE_HOME/webcache2

Their port assignments are in the

$ORACLE_HOME/webcache(1 or 2)/install/portlist.ini files.

Go to webcache1 to create cluster:

<http://hostname1:4000/> -- log on as the “administrator” userid.

Click Clustering under Properties. In the new page, select the cluster member and

click Edit Selected, enter a new name, submit and restart web cache.

Go to webcache2 to add the web cache to cluster.

Click Clustering under Properties and then click “Add.” Enter information and submit.

In Cache operations, select the new cache cluster and then click Propagate. Then

select all cache and click Restart.

How do you find the DCM user password?

Go to the oidadmin tool, log as “orcladmin”

cn = OracleContext

cn = Products

cn = IAS

IAS Infrastructure Databases

orclReferenceName=<database-name>

OrclResourceName=DCM

How do you deploy an application to OC4J?

First you should create an OC4J instance. In the OC4J control page, click on the Application tab. In this page, you can deploy EAR or WAR files. In the deploy application page, type the J2EE application location, application name, and select “default” as Parent Application. Click the Finish bottom after you entered the URL mapping for your Web Modules for example /myapplication. To point your browser to your application just type: http://<host-name>:<HTTP listener port>/myapplication.

How do you administer OracleAS business intelligence components?

In this section, you will learn how to access business intelligence home pages, identify the different components running, start, stop and restart instances.

# $ORACLE_HOME/bin/emctl stop iasconsole -- to stop or start enterprise manager

# $ORACLE_HOME/bin/opmn/bin/opmnctl stopall -- to stop or start all bi components.

To run a report using url:

http://<hostname>:<httpServerPort>/reports/paramform.jsp?userid=.../...@databasname

To run a form using url:

http://<hostname>:<httpServerPort>/forms90/f90servlet?form=your-form-name

To compile the forms:

# f90genm.sh your-form-name.fmb userid=username/password@your-database