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Overview 9

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• Events: Database events are processed by the Oracle Enterprise

Manager and alerts are generated when specified error thresholds

are reached. Monitor events as required and respond to alerts as

appropriate. See “Event monitoring” on page 23.

• Alert logs and trace files: When an Oracle process detects an

internal error, it dumps information about the error into a trace file.

Each Database Module also has an alert file. The alert file is a

chronological log of messages and errors, such as all internal

errors, block corruption errors, and deadlock errors. See “Alert log

and trace file monitoring” on page 35.

• Tablespaces: Nortel Networks recommends that you regularly

monitor tablespaces and ensure that they do not run out of disk

space.

To monitor tablespace sizes and disk space usage or set thresholds

for generating alert logs and trace files, use either the System

Management Console (Oracle Monitor Application) or the OEM

Console.

• Reports: The OEM Console can generate reports about

configuration, status, events, and backup jobs as required. See

“Reports” on page 37.

• Oracle Monitoring Application: See “Tools and utilities” on

page 10.

Failover

Failover occurs when an application identifies a problem with the

primary database. During a failover, applications begin using the

secondary database. Because the two databases are replicated, they

contain consistent data and the query information is automatically

supplied from the secondary database. See “Fault management” on

page 17.

Security

The Database Module uses Oracle database technology to ensure

confidentiality, integrity, and availability of data. The Database Module

is also protected by user authentication and network firewalls

configured in a network architecture.

For additional information, see MCP Basics and “Security” on page 95.

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Nortel Networks FP1 Manuale Utente Pagina 9