Workshop

Objectives After completing this lesson, you should be able to do the following: Document a database configuration by using a Database Configuration Worksheet Recover data while minimizing down time and data loss Use database tools and features to monitor and improve database performance

Workshop Methodology Team-oriented and interactive Tools used to keep the database performance at specified levels Hands-on diagnosis and problem resolution for a variety of failure scenarios Multiple solutions possible for each scenario Develop troubleshooting and administration skills Workshop Methodology Group-Oriented and Interactive Structure The workshop is structured to allow individuals to work in groups to perform database backup, restore, and recovery operations. Each group is encouraged to share its approach to resolving database failures with other groups in the class. Intensive Hands-On Diagnosis and Problem Resolution The intent is to provide you with as much hands-on experience as possible to diagnose and work through backup and recovery scenarios. Experience and knowledge gained from the course will play a major role toward successfully completing the objectives of each session. Using the Right Tools Enterprise Manager Database Control for Oracle Database 10g provides a wealth of information to the DBA. Filtering through the information to identify problems and knowing what tool to use to resolve them can be a challenge. By simulating problems that are not known to you ahead of time, you gain experience in locating problems and resolving them on your own.

Business Requirements Twenty-four hour availability Varying peak usage across all time zones Daily backups required Complete database recovery required Business Requirements The following business requirements should be familiar to you when configuring your database for backup and recovery. Twenty-four hour availability: The database must be available 24 hours a day, 7 days a week. An eight-hour period for maintenance is scheduled for the first Saturday of each month when the instance can be shut down. Peak usage varies across available time frame: This database is accessed globally, so it is used throughout the 24-hour period of one day. Daily backups: Full database backups are required on a daily basis. Complete database recovery: This is a critical business application database and data loss cannot be tolerated. A high number of transactions occur over the 24-hour time frame.

Database Configuration Archiving is enabled. Log files are mirrored and distributed across multiple devices. Control files are mirrored and distributed across multiple devices. Flashback Database is enabled. Full backup of the database exists, including archive log files. Database Configuration The first scenario sets up your environment to meet these requirements. Because of the limitations of the servers used in the classroom, all the critical database files reside on the same disk for this workshop.

Method for Resolving Database Issues Phase I: Diagnose the problem. Phase II: Determine the appropriate method to resolve the problem. Phase III: Resolve the problem. Phase IV: Back up the database, if needed. Method for Resolving Database Issues The workshop is a hands-on exercise. For data failure scenarios, you can choose the restore and recovery operation that you deem appropriate for the situation. Multiple failure and recovery scenarios will be conducted during the workshop. The instructor will not tell you which failure occurs in each scenario. To complete each task, use the features and techniques learned in this course. Phase I: Diagnose the Problem 1. The first phase is to research the nature of the problem. Use the EM Database Control Console, data dictionary views, trace and log files, and basic operating system commands to collect information. 2. Determine whether the database instance is available and the database is open. 3. Attempt to start the instance. 4. Shut down the instance if a problem occurs while starting it or when opening the database. 5. Check the Database Alerts region in the Database home page. Also, check the trace files and the alert log file as needed. 6. Check the Job Activity section in the Database home page of the Database Control Console to verify that all application jobs are running without error. Investigate any execution problems.

Summary Instructor-facilitated workshop Team-oriented Hands-on approach Use tools and diagnostics to: Monitor database performance Identify problems and potential problems Minimize down time and data loss Summary Instructor-Facilitated Workshop The instructor will facilitate the workshop by providing guidance and additional information as appropriate. Group-Oriented Emphasis A strong emphasis is placed on teaming with other students in the workshop for purposes of diagnosing and resolving failures. The ability to complete each scenario successfully is based on the cumulative knowledge and problem resolution skills of each group. Hands-On Approach This is meant to be a hands-on workshop, providing you with the maximum allowable time to be involved in a lab situation.

Practice Overview: Workshop Setup This practice covers the following topics: Restoring the database to a previous point in time Performing a physical investigation of the database: Using the Enterprise Manager Database Control Console Using views and tools Viewing command output and log files Viewing trace files and the alert log Modifying the database configuration to meet business requirements Resolving typical database administrative issues Practice Overview: Workshop Setup For the practice exercise, you will restore the backup of the database taken in the first practice exercise of this course. After the database is restored, you will investigate the database, alter its configuration to meet business requirements, and work through various scenarios to simulate typical database administrator tasks. Physical Investigation Use the features of Oracle Database 10g, such as Enterprise Manager, SQL*Plus, the V$ views and other data dictionary views, to derive information about your database environment. Keep the business requirements in mind and note any deficiencies that you feel will need to be corrected to support these requirements. Database Configuration Physically modify the database configuration to ensure that the business requirements can be met. Database Administration Work through the scenarios, in any order, to gain experience in resolving typical database administrative tasks and procedures.