Preface

Oracle9iAS Web Cache Administration and Deployment Guide describes how to use Oracle Web Cache to cache both static and dynamically generated content from one or more application Web servers.

This preface contains these topics:

• Audience

• Organization

• Related Documentation

• Conventions

• Documentation Accessibility

Audience

Oracle9iAS Web Cache Administration and Deployment Guide is intended for Web site administrators who perform the following tasks:

• Web site administration

• Application Web server administration

• Domain Name System (DNS) administration

To use this guide, you need to be familiar with release 1.0 and 1.1 of the HTTP protocol, as well as application Web server and DNS administration.

Organization

This document contains:

Part I, "Getting Started with Oracle Web Cache"

Chapter 1, "Introduction to Oracle Web Cache"

This chapter introduces the architecture, benefits, and main features of Oracle Web Cache.

Chapter 2, "Oracle Web Cache Concepts"

This chapter explains how Oracle Web Cache is populated with content, how that content maintains consistency, and how dynamically generated content is cached.

Chapter 3, "Deploying Oracle Web Cache"

This chapter presents several scenarios for deploying Oracle Web Cache.

Chapter 4, "Configuration and Administration Tools Overview"

This chapter introduces the various administration tools of Oracle Web Cache. It discusses the main administration application and tells you how to launch it and navigate through it.

Part II, "Configuration and Administration of Oracle Web Cache"

Chapter 5, "Initial Setup and Configuration"

This chapter describes the steps to initially configure Oracle Web Cache to begin caching content.

Chapter 6, "Creating Rules for Cached Content"

This chapter explains how to configure cacheability rules.

Chapter 7, "Configuration Considerations for Web Sites with Multiple Application Web Servers"

This chapter describes load balancing, failover, and session binding configuration options available for deployments with two or more application Web servers.

Chapter 8, "Administering Oracle Web Cache"

This chapter describes how to start and stop Oracle Web Cache, invalidate documents in the cache, and evaluate event and access log files.

Chapter 9, "Monitoring Performance"

This chapter describes how to gather performance statistics and interpret them.

Chapter 10, "Troubleshooting Oracle Web Cache Configuration"

This chapter describes common configuration problems and debugging techniques for resolving them.

Chapter 11, "A Case Study Deployment"

This chapter describes how Digital River, a global Commerce Service Provider (CSP), deployed Oracle Web Cache.

Part III, "Reference"

Appendix A, "Oracle Web Cache Directory Structure"

This appendix describes the installed Oracle Web Cache directory structure.

Appendix B, "Oracle Web Cache Default Settings"

This appendix describes the default settings for Oracle Web Cache.

Appendix C, "Invalidation Document Type Definition"

This appendix describes the Document Type Definition (DTD), or grammar, of invalidation requests and responses.

Appendix D, "Edge Side Includes Language"

This appendix describes the Edge Side Includes (ESI) language used for content assembly of dynamic HTML fragments.

Appendix E, "Event Log Messages"

This appendix describes the most common event log messages.

Glossary

Related Documentation

For more information, see the Oracle9i Application Server documentation set, especially:

• Oracle9i Application Server Overview Guide

• Oracle9i Application Server Oracle Wallet Manager User's Guide

• Oracle HTTP Server powered by Apache Performance Guide

• OracleJSP Support for JavaServer Pages Developer's Guide and Reference

• Oracle PL/SQL documentation

In North America, printed documentation is available for sale in the Oracle Store at

http://oraclestore.oracle.com/

Customers in Europe, the Middle East, and Africa (EMEA) can purchase documentation from

http://www.oraclebookshop.com/

Other customers can contact their Oracle representative to purchase printed documentation.

To download patches, please visit the Oracle Technology Network at

 http://otn.oracle.com/products/ias 

For additional information, see:

• http://www.cs.utah.edu/dept/old/texinfo/regex/regex_toc.html for regular expression syntax

• http://www.ietf.org/ for information about the Open Systems Interconnection (OSI)

• http://www.cookiecentral.com/ for further information about cookies

• http://rfc.net/rfc2616.html for further information about the HTTP protocol

• http://rfc.net/rfc2965.html for further information about the Set-Cookie response header

• http://rfc.net/rfc1421.html for further information about password base64 encoding

• http://www.edge-delivery.org for further information about the Edge Side Includes (ESI) language

Conventions

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

• Conventions in Text

• Conventions in Code Examples

• Conventions for Windows Operating Systems

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 Application Server Overview Guide 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 monospace (fixed-width font) italic	Lowercase monospace italic font represents placeholders or variables.	You can specify the parallel_clause. Run Uold_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.
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;

Conventions for Windows Operating Systems

The following table describes conventions for Windows operating systems and provides examples of their use.

Convention	Meaning	Example
Choose Start >	How to start a program. For example, to start Oracle Database Configuration Assistant, you must click the Start button on the taskbar and then choose Programs > Oracle - HOME_NAME > Network Administration > Wallet Manager.	Choose Start > Programs > Oracle - HOME_NAME > Network Administration > Wallet Manager
C:\>	Represents the Windows command prompt of the current hard disk drive. Your prompt reflects the subdirectory in which you are working. Referred to as the command prompt in this guide.	C:\webcache\bin
HOME_NAME	Represents the Oracle home name. The home name can be up to 16 alphanumeric characters. The only special character allowed in the home name is the underscore.	C:\> net start OracleHOME_NAMEWebCache

Documentation Accessibility

Our goal is to make Oracle products, services, and supporting documentation accessible, with good usability, to the disabled community. To that end, our documentation includes features that make information available to users of assistive technology. This documentation is available in HTML format, and contains markup to facilitate access by the disabled community. Standards will continue to evolve over time, and Oracle Corporation is actively engaged with other market-leading technology vendors to address technical obstacles so that our documentation can be accessible to all of our customers. For additional information, visit the Oracle Accessibility Program Web site at

http://www.oracle.com/accessibility/

Accessibility of Code Examples in Documentation

JAWS, a Windows screen reader, may not always correctly read the code examples in this document. The conventions for writing code require that closing braces should appear on an otherwise empty line; however, JAWS may not always read a line of text that consists solely of a bracket or brace.

Accessibility of Links to External Web Sites in Documentation

This documentation may contain links to Web sites of other companies or organizations that Oracle Corporation does not own or control. Oracle Corporation neither evaluates nor makes any representations regarding the accessibility of these Web sites.