Workshop doc

19 Copyright © Oracle Corporation, 2002. All rights reserved. Workshop 19-2 Copyright © Oracle Corporation, 2002. All rights reserved. Objectives After completing this lesson, you should be able to do the following: • Document a database configuration by using the Database Configuration Worksheet • Configure an Oracle9i database to support stated business requirements • Recover a failed database while minimizing down time and data loss 19-3 Copyright © Oracle Corporation, 2002. All rights reserved. Objectives • Enable and use trace output for troubleshooting • Identify and troubleshoot: – Listener problems – Client configuration issues 19-4 Copyright © Oracle Corporation, 2002. All rights reserved. Workshop Methodology • Group-oriented and interactive • Intensive hands-on diagnosis and problem resolution • Variety of failure scenarios • Recovery solutions • Variety of configuration errors • Develop troubleshooting skills 19-6 Copyright © Oracle Corporation, 2002. All rights reserved. Workshop Approach • Physical investigation: – Use views and tools to derive information – View trace files and log files – View command output and log files – Use views and tools to confirm proper database configuration • Database configuration: – Archiving is enabled – Control files and log files are mirrored – Control file is backed up 19-7 Copyright © Oracle Corporation, 2002. All rights reserved. Business Requirements • Twenty-four hour availability • Peak usage varies across all time zones • Daily backups are required • Complete database recovery is required 19-8 Copyright © Oracle Corporation, 2002. All rights reserved. Resolving a Database Failure • Phase I: Diagnose the problem • Phase II: Restore appropriate files • Phase III: Recover the database • Phase IV: Back up the database 19-10 Copyright © Oracle Corporation, 2002. All rights reserved. Resolving a Network Failure • Use OS utilities like ping and telnet to test network connectivity. • Use Oracle Net utilities to test service connectivity. • Check log files initially to diagnose problems. • Use tracing only when needed. • Trim the trace files regularly because of their potential growth. 19-11 Copyright © Oracle Corporation, 2002. All rights reserved. Enable Tracing • Oracle Net Manager • Edit sqlnet.ora file TRACE_DIRECTORY_CLIENT = /u01/user01/NETWORK/LOG NAMES.DEFAULT_DOMAIN = us.oracle.com TRACE_UNIQUE_CLIENT = on TRACE_FILE_CLIENT = client.trc TRACE_LEVEL_CLIENT = SUPPORT NAMES.DIRECTORY_PATH= (TNSNAMES) 19-12 Copyright © Oracle Corporation, 2002. All rights reserved. Using Trace Files Trace files will give you a better understanding of: • The flow of packets between network nodes • Which component of Oracle Net is failing • Pertinent error codes [...]...Summary • • • • • • 19-14 Instructor-facilitated workshop Group-oriented Hands-on approach Simulated “real-world” environment Minimize down time and data loss Use tools and diagnostics to determine the type of failure Copyright © Oracle Corporation, . rights reserved. Workshop 19-2 Copyright © Oracle Corporation, 2002. All rights reserved. Objectives After completing this lesson, you should be able to do the following: • Document a database. problems – Client configuration issues 19-4 Copyright © Oracle Corporation, 2002. All rights reserved. Workshop Methodology • Group-oriented and interactive • Intensive hands-on diagnosis and problem. errors • Develop troubleshooting skills 19-6 Copyright © Oracle Corporation, 2002. All rights reserved. Workshop Approach • Physical investigation: – Use views and tools to derive information – View trace