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

Oracle's recommended backup strategy


A rolling updated full backup strategy has its place in a production environment. Here is a short list of the best reasons and features:

  • It reduces the number of repeated full backups

  • It can reduce the restore time if switch to copy is used

  • It reduces network bandwidth to transport backups offsite and incremental(s) take up less space

  • Improved Tape bandwidth due to less reads

  • Option for restoring objects changed with NOLOGGING option because changed data blocks are captured

  • It synchronizes the physical standby with incremental merge changes

  • There is no need to modify CONTROL_FILE_RECORD_KEEP_TIME

  • It's useful for merging monthly datawarehouse backups with transportable tablespaces

Issues with incremental merge backups

Just as there are positives to Oracle's recommended method of backups and recovery, there are also some downsides that need to be covered:

  • The amount of disk storage needed is higher for the image copy backup versus a single full RMAN backup. That...