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Configuring the OEM

What is an Oracle Management Server?

The Management Server is the core of the Enterprise Manager framework and provides
  1. administrative user accounts,
  2. processes management functions such as jobs and events, and
  3. manages the flow of information between the tiers.

As the number of nodes and managed services in your network increases or if the current Management Server is overloaded, you can add more Oracle Management Servers to the middle tier to share and balance the workload. These additional Management Servers provide fault-tolerance in the case where one Management Server becomes unavailable. All Management Servers administering the same set of managed nodes share a single Repository, which stores all system data, application data, and the state of managed nodes throughout the environment.

Three Tiers consisting of 1) Nodes, 2) Oracle Management Server, and 3) Console

Oracle RMAN Backup and Recovery

Oracle Management Server

In relational database management systems and in the particular context of an Oracle Enterprise Manager (OEM) environment, an (OMS) Oracle Management Server is a software system that functions as a middle tier between Oracle intelligent agents and Oracle management consoles. The system may operate on multiple nodes and by default uses a schema named DBSNMP. Through this system, database administrators may view and control their OEM domain or domains. An OMS has special links with a repository database, used for storing OEM details.
Below are a series of image that contain the code requirements for REPORT commands.

Code requirements for REPORT Commands

Configuring OEM for Recovery Manager

Step 1: Configuration Operation, when you start the OEM Configuration Assistant as a stand-alone application, the Configuration Operation is displayed. Select Create a new repository from the list of repository operations.

Select Database for Repository, log into the database where you would like to place the repository. User name and Password: You must connect to the database as a user with DBA privileges.

Repository Login Information: A database user owns an Enterprise Manager repository. Enter the repository's user name, which will be used to create a database user, the password for that user, and verify the password by typing it again.

Select Repository User Tablespaces, Within the "Select Repository User Tablespaces" page, specify the default and temporary tablepsaces.

"Create Repository Summary", The "Create Repository Summary" page provides a summary of all information supplied during the create repository Wizard operation.

Start Intelligent Agent, Oracle Enterprise Manager uses Intelligent Agents, which are processes running on remote nodes within the network, to run jobs, monitor events, and gather data on remote sites and to discover servics on the node where it resides.

Start Data Gatherer, The Oracle Data Gatherer is responsible for handling requests from client applications that want to collect data. For each client application, specify the performance data to collect and the time interval between data samples.

Start Management Servers, The Management Server provides distributed control between clients and managed needs. A central engine for notification, it processes all system management tasks and administers the distribution of these tasks across the enterprise.

Start Console, The Console gives you a central point of control for the Oracle environment through an intuitive graphical user interface (GUI) that provides powerful and robust system management.

Create Administrator accounts, OEM 2.0 is a multi-administrator system where every person who is administering system using Enterprise Manager has his or her own administrator account, which he or she uses to log into the Console or standalone application.

Discover services, The Console Navigator provides a Service Discovery function for identifying network services and populating the Navigator tree.

Create Windows user account with privileges to submit jobs, To create a new Windows user account on the Windows machine where the Intelligent agent is installed and grant the 'log in as batch jobs' privilege to this user, perform the procedure below:

Set up Preferred Credentials on nodes, To set preferred credentials within the Console, follow the steps outlined below: 1) To view the services available for management using the Intelligent Agent, select System -> Preferences -> Preferred Credentials