Understanding Oracle GoldenGate 12c

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Understanding
Oracle GoldenGate 12c

Content
 Introduction
 Features
 Topologies
 Architecture
 Supported Data types

GoldenGate Introduction
 Oracle GoldenGate is a heterogeneous replication solution.
 GoldenGate (the company and the product) was acquired by Oracle Corporation in 2009.
 Controversial replacement for Oracle Streams.
 Key Plays for Oracle GoldenGate.
Query Offloading Continuous Availability Real Time Data Integration
• Cost Reduction Move reads
to lower cost systems.
• Resource Utilization Use
physical standby for reads.
• Zero Downtime Migration &
Upgrade Migrate to Oracle
DB or upgrade to latest
application version with no
downtime
• Disaster Recovery & Data
Protection Create live
standby for failover, avoid
and repair block corruptions
• Data Distribution
Synchronize hub & spoke or
distributed systems.
• Operational Reporting
Quickly report on
transaction system data with
no source impact.
• Real Time Business
Intelligence Understand
current metrics in historical
context.

GoldenGate supports:
 Live standby database.
 Active-active high availability.
 Zero Downtime Upgrade and Migration.
 Query and Report offloading.
 System Integration / Data Synchronization.
 Real-time Data distribution.
 Real-time Data Warehousing.

New features in Oracle GoldenGate 12c
 Optimizations for Oracle Database 12c
Support for multitenant architecture and cloud-based real-time replication.
 Integrated Delivery for the Oracle Database
Leveraging lightweight streaming API built exclusively for Oracle GoldenGate for better
performance and scalability.
 Coordinated Delivery for Non-Oracle Databases
Orchestrates the high-speed apply processes and simplifies set-up and management.
 Integrated Capture Enhancements
Improved performance and streamlined DDL replication.
 Improved Ease of Use
Automatic discard file, enhanced debugging, and schema wildcarding.
 Tighter Security
Integration with the Oracle Credential Store and Oracle Wallet to store and retrieve
encrypted usernames and passwords.

New features in Oracle GoldenGate 12c
 Expanded Heterogeneity
Enhancements to existing supported platforms such as Oracle MySQL, Microsoft SQL
Server, Sybase, and IBM DB2.
 Enhanced High Availability
Integration with Oracle Data Guard and Fast-Start-Fail-Over (FSFO) for automated and
transparent failover of components.
 Expanded Oracle Application and Technology Support
Low downtime database platform migrations for E-Business Suite, Active-Active Oracle
ATG web commerce and seamless integration with Oracle Coherence “HotCache”.

GoldenGate Supported Topologies

GoldenGate Supported Databases
 DB2 LUW on IBM AIX, HP-UX, Sun Solaris, LINUX.
 DB2 for I programs IBM i7.1 Group PTF/IBM i6.1 Group PTF/BM OS/400 V5R4 Group
PTF.
 Informix on Sun Solaris, LINUX.
 MySQL on IBM AIX, IBM z/OS, HP-UX, Sun Solaris.
 Microsoft SQL Server 2000, 2005, 2008
 Nonstop SQL/MX.
 PostgreSQL on IBM AIX, HP-UX, Sun Solaris, HP Tru64 (OSF/1), LINUX.
 Sybase on Windows, UNIX and Linux
 Teradata on Windows, UNIX and Linux
 TimesTen on IBM AIX, HP-UX, Sun Solaris, LINUX.
 Oracle Database on Windows, Linux, Solaris SPARC.

Oracle Streams versus GoldenGate

GoldenGate Basic Architecture

GoldenGate Configuration Options

GoldenGate Classic Capture

GoldenGate Integrated Capture

GoldenGate Downstream Capture
 Real Time Downstream Mode

GoldenGate Downstream Capture
 Downstream Archive Log Mode

GoldenGate Bi-Directional Replication
 Also known as Active-Active Replication

GoldenGate Supported Data Types
 The following data types are supported for both classic and integrated capture
 NUMBER
 BINARY FLOAT
 BINARY DOUBLE
 CHAR
 VARCHAR2
 LONG
 NCHAR
 NVARCHAR2
 RAW
 LONG RAW
 DATE
 TIMESTAMP

GoldenGate Supported Data Types
 There is limited support in classic capture for the following data types:
 INTERVAL DAY
 INTERVAL YEAR
 TIMESTAMP WITH TIME ZONE
 TIMESTAMP WITH LOCAL TIME ZONE
 The following data types are not supported
 Abstract data types with scalar, LOBs, VARRAYs, nested tables , REFS
 ANYDATA
 ANYDATASET
 ANYTYPE
 BFILE
 MLSLABEL
 ORDDICOM
 TIMEZONE_ABBR
 URITYPE
 UROWID

GoldenGate Restrictions
 Neither capture method supports
 Database replay
 EXTERNAL tables
 Materialized views with ROWID
 Classic capture does not support
 IOT mapping tables
 Key compressed IOTs
 XMLType tables stored as XML Object Relational
 Distributed Transactions
 XA and PDML distributed transactions
 Capture from OLTP table compressed tables
 Capture from compressed tablespaces
 Exadata Hybrid Columnar Compression (EHCC)

GoldenGate Oracle-Reserved Schemas
 The following schema names are reserved by Oracle and should not be configured for
GoldenGate replication:
$AURORA EXFSYS REPADMIN
$JIS MDSYS SYS
$ORB ODM SYSMAN
$UNAUTHENTICATED ODM_MTR SYSTEM
$UTILITY OLAPSYS TRACESVR
ANONYMOUS ORDPLUGINS WKPROXY
AURORA ORDSYS WKSYS
CTXSYS OSE$HTTP$ADMIN WMSYS
DBSNMP OUTLN XDB
DMSYS PERFSTAT
DSSYS PUBLIC

GoldenGate RAC Support
 RAC support has some limitations in classic capture mode
 Extract can only run against one instance
 If instance fails,
 Manager must be stopped on failed node:
 Manager and extract must be started on a surviving node
 Failover can be configured in Oracle Grid Infrastructure
 Additional archive log switching may be required in archive log mode
 Before shutting down extract process
 Insert dummy record into a source table
 Switch log files on all nodes
 Additional configuration required to access ASM instance
 Shared storage for trails can be:
 OCFS
 ACFS
 DBFS
 No mention of NFS in the documentation

Thank You!

Understanding Oracle GoldenGate 12c

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