Preface

This guide describes the administration of Oracle Real Application Clusters Guard. It describes the configuration parameters, how to set up customized features, how to use the command-line interface, how to set up the network configuration, and how to troubleshoot Oracle Real Application Clusters Guard.

This preface contains these topics:

Audience

Oracle9i Real Application Clusters Real Application Clusters Guard I - Concepts and Administration is intended for database administrators and systems administrators who administer an Oracle Real Application Clusters Guard environment.

To use this document, you need to have a thorough understanding of the concepts of Oracle Real Application Clusters Guard, the administration of the Oracle server and Oracle9i Real Application Clusters, and your platform-specific cluster technology.

Organization

This document contains the following chapters and appendices:

Chapter 1, "Oracle Real Application Clusters Guard Architecture"

This chapter describes the architecture of Oracle Real Application Clusters Guard.

Chapter 2, "Oracle Real Application Clusters Guard Operation"

This chapter describes the operation of Oracle Real Application Clusters Guard.

Chapter 3, "Oracle Real Application Clusters Guard Configuration Parameters"

This chapter describes the configuration parameters for Oracle Real Application Clusters Guard and discusses their values. It also explains how to change their values.

Chapter 4, "Using Oracle Real Application Cluster Guard Commands"

This chapter explains how to use the command-line interface of Oracle Real Application Clusters Guard.

Chapter 5, "Customizing Oracle Real Application Clusters Guard"

This chapter describes how to customize the call-home feature, the custom query, role change notification, and Oracle Enterprise Manager for Oracle Real Application Clusters Guard. It also explains how to use the DBMS_LIBCACHE package to warm the cache on the secondary instance.

Chapter 6, "Administering Oracle Real Application Clusters Guard"

This chapter describes how to administer planned outages, recover from unplanned outages, and administer application failover, backups, and configuration changes.

Chapter 7, "Configuring the Network for Oracle Real Application Clusters Guard"

This chapter explains how to set up the network configuration.

Chapter 8, "Troubleshooting Oracle Real Application Clusters Guard"

This chapter describes message output and explains how to interpret the log files. It contains troubleshooting strategies for startup problems, command-line problems, monitor problems, and problems that originate outside of Oracle Real Application Clusters Guard.

Appendix A, "Oracle Real Application Clusters Guard Error Messages"

This appendix contains the Oracle Real Application Clusters Guard error messages.

Glossary

The glossary defines Oracle Real Application Clusters Guard terms.

Conventions

This section describes the conventions used in the text and code examples of this documentation set. It describes:

Conventions in Text

We use various conventions in text to help you more quickly identify special terms. The following table describes those conventions and provides examples of their use.

Convention	Meaning	Example
Bold	Bold typeface indicates terms that are defined in the text or terms that appear in a glossary, or both.	When you specify this clause, you create an index-organized table.
Italics	Italic typeface indicates book titles or emphasis.	Oracle9i Database Concepts Ensure that the recovery catalog and target database do not reside on the same disk.
`UPPERCASE monospace (fixed-width) font`	Uppercase monospace typeface indicates elements supplied by the system. Such elements include parameters, privileges, datatypes, RMAN keywords, SQL keywords, SQL*Plus or utility commands, packages and methods, as well as system-supplied column names, database objects and structures, usernames, and roles.	You can specify this clause only for a `NUMBER` column. You can back up the database by using the `BACKUP` command. Query the `TABLE_NAME` column in the `USER_TABLES` data dictionary view. Use the `DBMS_STATS`.`GENERATE_STATS` procedure.
`lowercase monospace (fixed-width) font`	Lowercase monospace typeface indicates executables, filenames, directory names, and sample user-supplied elements. Such elements include computer and database names, net service names, and connect identifiers, as well as user-supplied database objects and structures, column names, packages and classes, usernames and roles, program units, and parameter values. Note: Some programmatic elements use a mixture of UPPERCASE and lowercase. Enter these elements as shown.	Enter `sqlplus` to open SQL*Plus. The password is specified in the `orapwd` file. Back up the datafiles and control files in the `/disk1/oracle/dbs` directory. The `department_id`, `department_name`, and `location_id` columns are in the `hr.departments` table. Set the `QUERY_REWRITE_ENABLED` initialization parameter to `true.` Connect as `oe` user. The `JRepUtil` class implements these methods.
`lowercase italic monospace (fixed-width) font`	Lowercase italic monospace font represents placeholders or variables.	You can specify the `parallel_clause`. Run `U``old_release``.SQL` where `old_release` refers to the release you installed prior to upgrading.

Conventions in Code Examples

Code examples illustrate SQL, PL/SQL, SQL*Plus, or other command-line statements. They are displayed in a monospace (fixed-width) font and separated from normal text as shown in this example:

SELECT username FROM dba_users WHERE username = 'MIGRATE';

The following table describes typographic conventions used in code examples and provides examples of their use.

Convention	Meaning	Example
[ ]	Brackets enclose one or more optional items. Do not enter the brackets.	`DECIMAL (``digits` `[ ,` `precision` `])`
{ }	Braces enclose two or more items, one of which is required. Do not enter the braces.	`{ENABLE \| DISABLE}`
\|	A vertical bar represents a choice of two or more options within brackets or braces. Enter one of the options. Do not enter the vertical bar.	`{ENABLE \| DISABLE}` `[COMPRESS \| NOCOMPRESS]`
`...`	Horizontal ellipsis points indicate either: That we have omitted parts of the code that are not directly related to the example That you can repeat a portion of the code	`CREATE TABLE ... AS` `subquery``;` `SELECT` `col1``,` `col2``, ... ,` `coln` `FROM employees;`
. . .	Vertical ellipsis points indicate that we have omitted several lines of code not directly related to the example.	SQL> SELECT NAME FROM V$DATAFILE; NAME ------------------------------------ /fsl/dbs/tbs_01.dbf /fs1/dbs/tbs_02.dbf . . . /fsl/dbs/tbs_09.dbf 9 rows selected.
Other notation	You must enter symbols other than brackets, braces, vertical bars, and ellipsis points as shown.	`acctbal NUMBER(11,2);` `acct CONSTANT NUMBER(4) := 3;`
`Italics`	Italicized text indicates placeholders or variables for which you must supply particular values.	`CONNECT SYSTEM/``system_password` `DB_NAME =` `database_name`
`UPPERCASE`	Uppercase typeface indicates elements supplied by the system. We show these terms in uppercase in order to distinguish them from terms you define. Unless terms appear in brackets, enter them in the order and with the spelling shown. However, because these terms are not case sensitive, you can enter them in lowercase.	`SELECT last_name, employee_id FROM employees;` `SELECT * FROM USER_TABLES;` `DROP TABLE hr.employees;`
`lowercase`	Lowercase typeface indicates programmatic elements that you supply. For example, lowercase indicates names of tables, columns, or files. Note: Some programmatic elements use a mixture of UPPERCASE and lowercase. Enter these elements as shown.	`SELECT last_name, employee_id FROM employees;` `sqlplus hr/hr` `CREATE USER mjones IDENTIFIED BY ty3MU9;`

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