Key Aspects of a Migration The keys aspects of a migration are covered in the following lessons of this course: Planning a Migration Getting Started with Oracle Migration Workbench Performing a Migration Using Oracle Migration Workbench (Part I) Performing a Migration Using Oracle Migration Workbench (Part II) Application Migration: Overview Migrating SQL Statements Managing Transactions and Data Concurrency Migrating Stored Procedures and Triggers Testing the Migrated Oracle Database
The main areas of concern when migrating are: database migration(data and schema) and application migration(3GL/4GL code and SQL). There may be other items to migrate such as: DBA maintenance scripts, backup and recovery processes, user documentation, system documentation and test scripts. These are not discussed in this presentation.
Temporary tables - No Oracle equivalent to SQL Server or Sybase “pound” (temporary tables). Converter handles all issues and 8i provides session level global temporary tables. Results Set - Oracle is cursor based ( is optimized this way). SQL Server is streamed based (TDS). Datetime - SQL Server carries date and time to the millisecond. Note an issue any more with Oracle9i. Open Sever - No exact equivalent. Oracles’ Network Computing Architecture which uses Oracle Web Application Server is the same type of 3-tier multi-threaded listener process. More on this later.
Evaluation of Migration Requirements Understand your business requirements Develop a migration plan aligned with your strategic goals Include optional services such as education, performance tuning and Oracle Outsourcing, as required Assessment of Application System Delivery of application system to Oracle Assessment of the database and/or application Assessment report and statement of work Migration Migration of database and/or application Migration report Improvement and Optimization (optional) Adoption of key Oracle technology and features such as Real Application Clusters (RAC) and partitioning Performance tuning Implementation of operational procedures such as back up and recovery, database re-organization, and active monitoring Customer Acceptance Testing Perform a full system test to confirm that the migrated application behaves as expected Notify Oracle that the application is accepted or of any issues Production Application system goes live on the Oracle platform! Project Post Mortem You provide feedback to Oracle about the migration project Oracle ensures you have everything you require to make the migration a success Join the Oracle Customer Reference Program
What is Oracle Migration Workbench? Oracle Migration Workbench (Migration Workbench) is a wizard-driven tool that simplifies the process of migrating from third-party databases to the Oracle platform. You use Migration Workbench to migrate the entire schema including triggers and stored procedures. Oracle has made this tool available since 1988.
Migration Workbench Capabilities Many features of Migration Workbench simplifies the process of database migration. Using the tool, you perform the migration in stages using wizards and scripts and customize work-in-progress database objects in a repository that is separate from your production environment. To retrieve the SQL Server database information, you have an option either to connect to the SQL Server database directly or to run a script to extract that information, which you subsequently load into the repository. During the migration process, you monitor informational, warning, and error messages displayed in the Progress window. During the Assessment phase and Migration phase, you can also generate reports about the database objects to determine the amount automation Migration Workbench can achieve. Migration Workbench also parses and transforms Transact-SQL stored programs to Oracle PL/SQL. Note: Migration Workbench does not parse and transform all Transact-SQL constructs automatically. You may need to convert some stored procedures, triggers, and views manually. Details are covered in Lesson 16 Stored Procedures and Triggers Comparison . Overall, Migration Workbench makes the migration project easier to manage. By using Migration Workbench, you maximize automation of the migration process and reduce the effort and risks involved in the migration.
