Book Image

Oracle Database 11g : Underground Advice for Database Administrators

By : April Sims
Book Image

Oracle Database 11g : Underground Advice for Database Administrators

By: April Sims

Overview of this book

Today DBAs are expected to deploy and manage large databases with quality service and little to no downtime. The DBA's main focus is on increasing productivity and eliminating idle redundancy throughout the enterprise. However, there is no magic set of best practices or hard and fast rules that DBAs need to follow, and this can make life difficult. But if DBAs follow some basic approaches and best practices, tasks can be performed more efficiently and effectively.This survival guide offers previously unwritten underground advice for DBAs. The author provides extensive information to illuminate where you fit in, and runs through many of the tasks that you need to be watchful of, extensively covering solutions to the most common problems encountered by newcomers to the world of Oracle databases.The book will quickly introduce you to your job responsibilities, as well as the skills, and abilities needed to be successful as a DBA. It will show you how to overcome common problems and proactively prevent disasters by implementing distributed grid computing—scalable and robust—with the ability to redeploy or rearchitect when business needs change. Reduce downtime across your enterprise by standardizing hardware, software, tools, utilities, commands, and architectural components.This book will also help you in situations where you need to install Oracle Database 11g or migrate to new hardware making it compliant with a Maximum Availability Architecture. By the end of this book you will have learned a lot and gained confidence in your abilities. You will be armed with knowledge as to which tools are best used to accomplish tasks while proactively moving towards an automated environment.
Table of Contents (14 chapters)
Oracle Database 11g—Underground Advice for Database Administrators
Credits
About the author
About the reviewers
Preface
Index

Backup types and the default configuration


This section lists a few definitions that will need to be referred to for understanding the recommended backup strategy:

  • Backup sets: Default type of RMAN backup that contains what you want backed up, which can be datafiles, controlfiles, archived redo logs, or spfiles. Each backup set consists of pieces, which can be subsets (a backup of a large datafile cut up into small chunks) of the item you want backed up. You cannot cut up a large datafile across different backup sets or mix different types of files into the same backup set, but you can multiplex several database files into a single backup piece.

  • Image copy: Type of backup that is a bit-for-bit copy of the original—the same as creating a copy at the OS level (with Unix cp or dd commands), but is known to the RMAN utility. Making it known to RMAN means that the location and header file information has been recorded in either the control file or, optionally, the RMAN catalog. Archived redo...