Migrating to DB2 Tasks and Tools

Transcription

1 Migrating to DB2 Tasks and Tools Information Management 2012 IBM Corporation

2 Migration Roadmap 1- Assessment tools accurate rapid Understand the environment to be migrated Estimate effort 2- Database Migration tools automated Move DB objects (tables, functions, SPs, etc) and data 3- Application Code Migration Point application to DB2 server minimal changes for standard interfaces 4- Perform Functional Verification Execute regular set of tests for the application(s) IBM Corporation

3 1- Assessment tools accurate rapid Assessing the environment Gather details about applications and databases to be migrated. Eg: What DB interface (JDBC, ADO.NET, etc)? What PL/SQL features in use not yet supported by DB2 Tools Porting Assessment Questionnaire (PAQ) MEET DB2 Need help assessing complexity? Contact the Information Management Technology Ecosystem team IBM Corporation

4 PAQ - Porting Assessment Questionnaire Porting Assessment Questionnaire (PAQ) Gather metrics and technical details about applications and the database environment IBM Corporation

5 MEET DB2 Migration Enablement Evaluation Tool for DB2 Identifies code that uses features not supported in DB2 9.7 Windows only. Requires Java. Available for IBMers and Business Partners at: Clients should contact their IBM reps. HTML report that provides summary statistics Lists details and source code line number IBM Corporation

6 MEET DB2 - Reports Invoke MEET.bat to run the utility on Windows 1- Provide input PL/SQL file 2- Show report 3- Start evaluation IBM Corporation

7 MEET DB2 Report Technical Summary PL/SQL summary organized by object type DDL summary organized by statement type IBM Corporation

8 MEET DB2 Report Details Feature not supported List of occurrences Suggested solution IBM Corporation

9 MEET DB2 Available for IBMers & Business Partners For IBMers IBM intranet id/pw Run MEET DB2 View report For Business askdata@ca.ibm.com PW location ID Run MEET DB2 Instructions to decrypt report Report + PW PW ID verified IBM Corporation

10 2- Database Migration tools automated Move Oracle database objects and data to DB2 Extract DDL, PL/SQL objects and data from source database Recreate objects on DB2 database Load data into DB2 database Tools IBM Data Movement Tool Simple & powerful tool to move data and database objects from various database vendors to DB2. Leverages out-of-the-box compilation of PL/SQL source files. Optim Development Studio IBM Migration Toolkit is NOT recommended anymore use IDMT instead IBM Corporation

11 IBM Data Movement Tool Offers schema and data movement support from different database vendors to DB2 10 & between DB2 products in different platforms Oracle, Microsoft SQL Server, Microsoft Access, Sybase Adaptive Server Enterprise, MySQL, PostgreSQL, Ingres DB2 LUW DB2 LUW, DB2 for i, DB2 for z DB2 LUW FREE OF CHARGE High speed and parallel data movement Extracts Oracle data to flat files + creates LOAD scripts to import data into DB2 Supports use of PIPES when disk space is restricted, or source DB is too large Download link and User Guide datamovement/index.html Requirements: JRE 1.5 or later, source database (eg: Oracle) and DB2 JDBC drivers IBM Corporation

12 IBM Data Movement Tool How to Use 1. Create the DB2 database with compatibility features db2set DB2_COMPATIBILITY_VECTOR=ORA db2stop force db2start db2 CREATE DATABASE dbname AUTOMATIC STORAGE YES ON <storagepath1> PAGESIZE 32 K -- Recommended but not required db2 UPDATE DB CFG FOR dbname USING AUTO_REVAL deferred_force DECFLT_ROUNDING round_half_up Enables all Oracle DB compatibility features Recommended to accommodate large row length Adjust rounding behaviour to match that of Oracle If you want to deploy objects out of dependency order IBM Corporation

13 IBM Data Movement Tool How to Use 2. Set up the tool Run IBMDataMovementTool.sh (Linux/UNIX) or IBMDataMovementTool.cmd (Windows) 2. Connect 1. Connection Parameters 3. Select Source Schema 4. Indicates if Compatibility Features are ON 5. Output dir 6. Items to extract 7. Limit # of rows to extract IBM Corporation

14 IBM Data Movement Tool How to Use 3. Extracting Objects and Data Click on Extract DDL/Data Extracts objects DDL and data from Oracle database to flat files. Check progress at the View File tab IBM Corporation

15 IBM Data Movement Tool How to Use 4. Extraction Results Files are created in the specified Output Directory DDL for objects using DB2 syntax * DDL for objects using PL/SQL syntax Script files Directories Extracted data * Includes data type mapping and small adjustments IBM Corporation

16 IBM Data Movement Tool How to Use 5. Deploying Objects to DB2 Interactive approach using the GUI Deploy ALL or SELECTED objects Extracted objects organized by type Use the editor to make adjustments Check deployment results IBM Corporation

17 IBM Data Movement Tool How to Use 5. Deploying Objects using CLP Using the command line (for advanced users) Run the db2gen.sh (or db2gen.cmd ) script DDL: Tables, default values, check constraints, PKs, indexes and sequences Data Loading: imports data from the text files Integrity Check: runs SET INTEGRITY to check imported data Constraints: creates unique and FKs constraints Check for errors in the db2gen.log file You can use the message files and dump files to diagnose problems with data loading operation 0 KB no rows rejected Message files DUMP files IBM Corporation

18 IBM Data Movement Tool How to Use 6. Deploying PL/SQL Objects Using the command line (for advanced users) Once the database schema is created and the tables populated, you can create the PL/SQL objects. Execute the various db2plsql_*.db2 files. db2 tvf db2plsql_type.db2 db2 tvf db2plsql_type_body.db2 db2 tvf db2plsql_package.db2 db2 tvf db2plsql_package_body.db2 db2 tvf db2plsql_function.db2 db2 tvf db2plsql_views.db2 db2 tvf db2plsql_procedures.db2 db2 tvf db2plsql_triggers.db2 Check output file for errors Adjust any incompatibilities in the PL/SQL code IBM Corporation

19 IBM Data Movement Tool Using PIPES for Large Databases Used when: Source database is too large There is not enough space to hold intermediate flat files Works on Windows and UNIX Select option USE PIPES Start transfer IBM Corporation

20 IBM Data Movement Tool :: Using Auto Fix IDMT does not modify any PL/SQL code Auto Fix is a simple tool that makes quick fixes to PL/SQL code while maintaining the semantics of the code. Integrated into IDMT Increases out-of-the-box compatibility ratio of PL/SQL code Specify file to process and the output directory Creates a script that you can execute to process the selected file Click button to run the tool IBM Corporation

21 3- Application Code Migration minimal changes for standard interfaces Configure DB2 access interface Standardized interfaces: JDBC, ADO.NET, PDO, etc. Focus on changing connection strings/configuration. Eg: Class.forName( com.ibm.db2.jcc.db2driver ) DriverManager.getConnection( jdbc:oracle:thin:@server.com:5000:db1 ) Class.forName( com.ibm.db2.jcc.db2driver ) DriverManager.getConnection( jdbc:db2://server.com:5000/db1 ) Application that use Oracle's OCI can leverage DB2CI: DB2CI is an OCI compatible client that supports 150+ OCI functions Other interfaces... might require more work (Eg: Pro*C) No concurrency problems: Currently Committed isolation level provides same behavior as Oracle's statement level isolation IBM Corporation

22 Using CLPPlus for executing SQL*PLUS Scripts CLPPlus - Command Line Processor Plus DB2 counterpart for Oracle s SQL*PLUS Run Oracle SQL*PLUS scripts with no modifications Provides a familiar environment for Oracle DBAs to interact with DB IBM Corporation

23 Using CLPPlus for executing SQL*PLUS Scripts How to use: Invoke clpplus command with connection details clpplus Supports most common commands from SQL*Plus: ACCEPT: Displays a prompt and waits for the user s keyboard input EDIT: Invokes external editor for edition of a file or the SQL buffer DEFINE: Creates or replaces the value of a user variable BREAK, BTITLE, COMPUTE, REPFOOTER, REPHEADER, TTITLE: Reporting functions VARIABLE: Defines bind variables others IBM Corporation

24 Questions? Subject: DB2 10 Bootcamp Information Management 2012 IBM Corporation