GoldenGate and Oracle Data Integrator - A Perfect Match...
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This document discusses the integration of Oracle's Goldengate and Data Integrator (ODI) as tools for real-time data warehousing, highlighting Oracle's reference architecture for information management and big data. It emphasizes the functionalities of both technologies, including real-time data replication, ETL processes, and handling of change data capture. Additionally, it provides insights on implementing these systems effectively to address common challenges in data management.
GoldenGate and Oracle Data Integrator - A Perfect Match...
- 1. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com GoldenGate and Oracle Data Integrator - A Perfect Match... Michael Rainey, Principal Consultant, Rittman Mead Rittman Mead BI Forum 2013 Master Class, May 2013
- 2. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com •Real-time data warehousing is becoming standard across many organizations •Oracle’s Reference Architecture for Information Management and Big Data ‣Staging, Foundation, and Access and Performance Layers •Implementation of real-time data warehouse ‣Oracle GoldenGate - replication technology ‣Oracle Data Integrator - data integration & ETL ‣GoldenGate and ODI integration •Real-time ETL ‣Standard approach using Journalized data ‣Solutions to common challenges About this presentation...
- 3. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Oracle Reference Architecture for Information Management and Big Data
- 4. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Oracle Reference Architecture for Information Management and Big Data
- 5. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Oracle Reference Architecture for Information Management and Big Data
- 6. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Oracle Reference Architecture for Information Management and Big Data
- 7. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Oracle GoldenGate •Oracle’s standard tool for data replication •Provides log-based capture, distribution, and delivery of committed transactions in real-time ‣Sub-second replication time ‣Minimal impact to source and target systems ‣Utilizes platform independent universal data format •Replication of data between heterogeneous systems ‣Handles source and target column differences •Uni-directional or bi-directional replication •Easy to deploy - simple configuration of parameter files
- 8. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Oracle Data Integrator 11g •Oracle’s strategic product for data integration •Supports batch, event-driven, and real-time integration •Uses ELT (Extract, Load, Transform) approach ‣No middle ETL engine necessary ‣Utilizes power of target database to perform transformations •Supports heterogeneous data sources ‣Oracle, SQL Server, XML, flat-file, MySQL, DB2... •Declarative design - separation of business and technical integration •Data integrity controls create a “data firewall” •Extensible through “Knowledge Modules”
- 9. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Oracle Data Integrator Journalizing (CDC) •Change Data Capture (CDC) ‣Identify, capture, and deliver changes made to data in the source database •Oracle Data Integrator CDC delivered through Journalizing ‣Journalizing Knowledge Module (JKM) performs setup and creates infrastructure ‣Simple vs Consistent Set •ODI CDC Framework ‣Journals - tables (J$) hold references to the changed records and the change type (insert/update/delete) ‣Journalizing views - (JV$, JV$D) provides access to changed data, used by IKM’s and LKM’s ‣Capture processes - captures changed data from source datastores -Database specific programs to retrieve log data from data server log files (Ex: Oracle GoldenGate) ‣Subscribers - entities that use the changed data tracked on a datastore or consistent set -Data purged from journals after all subscribers have consumed changed data
- 10. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com •JKM Oracle to Oracle Consistent (OGG) Knowledge Module ‣Delivered with ODI ‣ODI Metadata used to generate GoldenGate parameter files (extract, pump, replicat) ‣ReadMe.txt file created with instructions •ODI CDC Framework generated ‣Staging table - replicate of the source ‣J$ (journal) table - change rows only •Journalized data used in transformations GoldenGate and ODI Integration
- 11. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Staging Layer Load •GoldenGate replication is setup and configured to keep the Staging schema in sync with the Source •All committed changes loaded to Staging in real-time
- 12. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com •Standard process was to load incremental changes from Staging to Foundation ‣Requires extra set of mappings ‣Increases latency of real-time data warehouse load Foundation Layer Load
- 13. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com •GoldenGate will load Foundation directly ‣Reduced overall data warehouse load time •A simple customization to the JKM will allow the generation of source to Foundation GoldenGate parameter files ‣Use INSERTALLRECORDS option for storing transactional history Foundation Layer Load
- 14. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com ODI and GoldenGate CDC Setup Process •Setup Staging and Foundation Models ‣Add Datastores ‣Add Primary Keys ‣Add data warehouse audit columns •Setup the GoldenGate JKM on each Model ‣Configure Options ‣Add each Datastore to CDC ‣Start Journal •Follow ReadMe.txt instructions to complete GoldenGate setup •Perform initial load of data from source to Staging and Foundation schemas •Start GoldenGate replication
- 15. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Set the Journalizing Knowledge Module Options - Staging Datastore Model
- 16. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Journalizing Knowledge Module Options •LOCAL_TEMP_DIR: Local path for generated parameter files •SRC_LSCHEMA: Source Logical Schema •SRC_DB_USER: Source GoldenGate user •SRC_DB_PASSWORD: Source GoldenGate password •SRC_OGG_PATH: Source GoldenGate install path •SRC_SETUP_OGG_PROCESSES: Setup extract files if true •STG_HOSTNAME: Target server hostname •STG_MANAGER_PORT: Target GoldenGate install port •STG_OGG_OBJECT_GROUP: Replicat file name •STG_OGG_PATH: Target GoldenGate install path •ENABLE_ODI_CDC: Setup the ODI CDC framework if true •STG_OGG_TRACK_HISTORY: Custom option - store history
- 17. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Configure GoldenGate
- 18. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Configure GoldenGate
- 19. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Set the Journalizing Knowledge Module Parameters - Foundation
- 20. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Initial Load of Target and GoldenGate Startup •Run initial load of source data before starting replication ‣Recommended tools: Oracle Datapump, Oracle Export/Import, DBLink •Example initial load and GoldenGate startup process: ‣Follow instructions to setup the GoldenGate parameter files ‣Start the GoldenGate extract and pump processes ‣Run the initial load using Oracle Datapump as of SCN ‣Once the initial load has completed, start the GoldenGate replicat process after the initial load SCN -GGSCI >start replicat ODIT1T afterCSN 123456 ‣Handling data collisions should not be necessary
- 21. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Access and Performance Layer Load •Moving change rows through to the star schema ‣Journalized data “out of the box” ‣Handling Parent-Child relationship ‣Subscription Views
- 22. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Using ODI Journalized Data in an Interface •Only one source Datastore can use “Journalized data” per Interface ‣Change view used as source ‣Filter added for Subscriber •Extend window and lock subscribers prior to Interface execution ‣Ensures consistent dataset for the specific Subscriber •Unlock subscribers and purge journal after execution
- 23. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Journalized ODI Interface - Design
- 24. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Journalized ODI Interface - Execution
- 25. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Parent-Child Table Relationships •Foreign key and parent-child relationships between Datastores ‣New or changed records in the Child table, Parent has no changes ‣Join between change datasets orphans child record •Example: ‣Parent change view - JV$ON_FIELD_ROSTER ‣Child full table - GAME_PLAY_DETAILS
- 26. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com left outer join Parent-child Tables Example left outer join Parent (change view) Child (full table) Parent (change view) Child (full table)
- 27. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Parent-child Tables Example left outer join left outer join Parent (change view) Child (full table) Parent (change view) Child (full table)
- 28. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Parent-child Tables - Solution •Create two ODI Interfaces ‣Interface 1: Parent table with Journalizing enabled joined to full child table ‣Interface 2: Child table with Journalizing enabled joined to full parent table •Both Interfaces have same logic, column mappings, etc •Consistent Journalizing must be used to ensure a consistent dataset GoldenGate Staging ODI CDC ETL Source Performance
- 29. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Parent-child Tables - Design
- 30. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Subscription Views •Dynamic subscription views simplify development ‣Return a consistent set of data ‣Reduce the number of mappings •Create a view for each Staging table •ETL developer can choose dataset to be returned ‣Change rows (J$ table) ‣Current replicated rows (Staging table) ‣Full transactional history (Foundation table) GoldenGate Change Views Staging Subscription Views ETL Source Performance
- 31. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Subscription Views - SQL Code
- 32. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com Subscription Views - SQL Code
- 33. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com In summary... •Real-time data warehousing is now a standard across many organizations •Oracle’s Reference Architecture for Information Management and Big Data provides a great structure for implementation •GoldenGate and ODI as the delivery mechanism, while integrated, are the perfect match for real-time data warehousing •Real-time ETL can be achieved using ODI Change Data Capture ‣Parent-child relationships and subscription views •More information can be found at http://www.rittmanmead.com •Contact us at [email protected] or [email protected] •Follow-us on Twitter (@rittmanmead & @mRainey) or Facebook (facebook.com/rittmanmead)
- 34. T : +44 (0) 8446 697 995 E : [email protected] W: www.rittmanmead.com GoldenGate and ODI - A Perfect Match... Michael Rainey, Principal Consultant, Rittman Mead Rittman Mead BI Forum 2013 Master Class, May 2013