Oracle GoldenGate and Apache Kafka: A Deep Dive Into Real-Time Data Streaming

info@rittmanmead.com www.rittmanmead.com @rittmanmead
Michael Rainey | Oracle OpenWorld 2016
Oracle GoldenGate and Apache Kafka: A Deep Dive Into Real-Time Data Streaming
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Introduction
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• Michael Rainey - Data Integration Lead

- Oracle Data Integration expertise
- Blog: http://ritt.md/mRainey
- Oracle ACE Director
@mRainey

About Rittman Mead
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•World’s leading specialist partner for technical
excellence, solutions delivery and innovation in
Oracle Data Integration, Business Intelligence,
Analytics and Big Data
•Providing our customers targeted expertise; we are a
company that doesn’t try to do everything… only
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•70+ consultants worldwide including 1 Oracle ACE
Director and 2 Oracle ACEs, offering training
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Unlock the potential of your organization’s data
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support the full lifecycle of any analytics solution

info@rittmanmead.com www.rittmanmead.com @rittmanmead 5

Data Integration Architecture
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Example - Marketing
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• Financial data stored in RDBMS

• Social media data, web logs, Google analytics, etc all in
various formats

• Bring it all together for analysis

‣ Marketing campaign effect on sales

Relational Data Replication - Oracle GoldenGate
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Oracle GoldenGate for Big Data (Then)
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Oracle GoldenGate for Big Data (Now)
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Streaming Data - Apache Kafka
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“Publish-subscribe messaging rethought as a
distributed commit log”
Image source: kafka.apache.org/

Streaming Data - Apache Kafka
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Image source: kafka.apache.org/

Kafka - How is it used?
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• Pure Event Streams

• System Metrics

• Derived Streams

• Hadoop Data Loads / Data Publishing

• Application Logs

• Database Changes

- Log Compaction
- Data cleansing
Image source: confluent.io

Kafka - How is it used?
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• Pure Event Streams

• System Metrics

• Derived Streams

• Hadoop Data Loads / Data Publishing

• Application Logs

• Database Changes

- Log Compaction
- Data cleansing
Image source: confluent.io
X
O

Enterprise Data Bus
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A simple example…
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One view of the Oracle Data Integrator logs

• ODI session logs - stored in the repository  
database

• ODI Agent logs - text files

To see the full picture of your ODI environment, they must be
combined

Steps to extract from the database
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• Prepare the database

• Setup GoldenGate for Oracle Database

- Install and configure
• Setup Manager, Extract and Pump parameter files

• Add Extract and Pump process groups

• Start the Extract and Pump processes

Prepare the Database - OGG User Permissions
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Prepare the Database - Logging Settings
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• Enable supplemental logging
• Set GoldenGate Replication parameter

Add Table Supplemental Logging
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GoldenGate Extract Setup
No change
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GoldenGate Manager Parameter File
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GoldenGate Extract Parameter File
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GoldenGate Pump Parameter File
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Adding the Extract and Pump Process Groups
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Stream ODI Agent Logs to Kafka via Logstash
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• Application log processing is a standard use for Kafka

• Logstash

- Part of the Elastic (formerly ELK) stack
- Robin Moffatt’s post—> http://ritt.md/kafka-elk
- Producer configuration for Kafka

Logstash to Kafka - Setup and Startup
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• Startup Zookeeper

- Elects controller broker
- Tracks brokers and topic config
- Manages access control and quotas
• Set Kafka server.properties

- Broker ID
- Number of partitions
- Log retention period
- Zookeeper connection
• Start Kafka

Setup Logstash Configuration File
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• Configuration File - logstash-odiagent-kafka-producer.conf

• Start Logstash

ODI Agent Logs to Kafka!
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• Start the Kafka Console Consumer - delivered with Kafka

• Start the ODI Agent

ODI Agent Logs to Kafka!
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GoldenGate Transactions to Kafka
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Oracle GoldenGate for Big Data
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• Kafka - one of many handlers

- HDFS, HBase, Flume, Hive
• Pluggable Formatters

- Convert trail file transactions to alternate format
- Avro, delimited text, JSON, XML
• Metadata Provider

- Handles mapping of source to target columns that differ in structure/name
- Similar to SOURCEDEF file in GoldenGate
- Avro or Hive

Oracle GoldenGate for Big Data - Kafka Handler Setup
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• Standard GoldenGate Extract / Pump processes

- Remember, no change here
• Replicat for Java parameter file & process group

• Kakfa Handler configuration

• Kafka Producer properties

- Note: Kafka 0.9.0+ now certified with GoldenGate for Big Data
12.2.1.1

Another approach…
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• Kafka Connect Handler (Open Source)

- java.net/downloads/oracledi/GoldenGate
- Uses the Kafka Connect framework
- Can integrate with Confluent Platform & Schema Registry
- Tables = Topics
• Differences?

- OGG for Big Data Kafka Handler uses pluggable formatters
- Kafka Connect Handler builds up schemas and structs via the Kafka
Connect API

Oracle GoldenGate for Big Data - Prerequisites
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• Zookeeper & Kafka up and running

• Add topic to broker up front vs dynamically

- Option to create a topic per table (OGG for Big Data 12.2.0.1.1)
• Kafka Handler must have access to broker server

• Kafka libraries must match Kafka version

Kafka topic per table
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More on this later

GoldenGate and Kafka - Replicat Parameters
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GoldenGate and Kafka - Kafka Handler Properties
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Properties describe how communication between the
GoldenGate adapter and Kafka will occur

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• gg.handlerlist = kafkahandler
• gg.handler.kafkahandler.type = kafka
• gg.handler.kafkahandler.KafkaProducerConfigFile = kafka_producer.properties
• gg.handler.kafkahandler.TopicName = odirepo

- Kafka topic name
• gg.handler.kafkahandler.format = xml | delimitedtext | json | avro_row | avro_op

- Pluggable Formatter - Avro recommended for Kafka…
• gg.handler.kafkahandler.BlockingSend = true | false
- true - synchronous (wait for acknowledgement before sending next message)
• gg.handler.kafkahandler.mode = tx | op

- Transaction vs Operation mode

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• goldengate.userexit.timestamp = utc

• goldengate.userexit.writers = javawriter

• javawriter.stats.display = TRUE

• javawriter.stats.full = TRUE

• gg.log = log4j

• gg.log.level = INFO

• gg.report.time = 30sec

• gg.classpath = dirprm/:/u01/kafka/kafka_2.10-0.8.2.1/libs/*:

- Location of the Kafka libraries

• javawriter.bootoptions = -Xmx512m -Xms32m -Djava.class.path=ggjava/ggjava.jar

GoldenGate and Kafka - One Topic Per Table
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• gg.handler.kafkahandler.topicPartitioning = table

- Option to split schema into one topic per table

- Topics can be created dynamically

• gg.handler.kafkahandler.mode = op

- Operation mode required to track individual table operations

GoldenGate and Kafka - Kafka Producer Configuration
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• Access to the Kafka producer configuration parameters

GoldenGate and Kafka - Startup
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• Create a topic in Kakfa (or one per table)

• Add Replicat process group to GoldenGate on target

• Start Kafka console consumer

• Start GoldenGate extract/pump on source, replicat on target

GoldenGate and Kafka Integration Complete!
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Schemas
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• Schema automatically created

- Stored in <ogg_home>/dirdef directory
- Based on gg.handler.kafkahandler.format setting

GoldenGate Big Data Adapter - What to Think About
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• GoldenGate might be a single point of failure

- Kafka is a fault-tolerant, distributed system
• Source transactions may end up larger than expected

- max.request.size
• Performance considerations

- batch.size and linger.ms
• higher values = increased latency, better throughput
- BlockingSend = false and Mode = tx
- GROUPTRANSOPS
• Monitoring

- Confluent? Custom?

Why GoldenGate with Kafka?
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• GoldenGate

- …is non-invasive
- …has checkpoints for recovery
- …moves data quickly
- …is easy to setup

Data Integration Architecture - Kafka throughout
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Questions?
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Questions?
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• Websites

- kafka.apache.org
- rittmanmead.com/blog
• Contact

- info@rittmanmead.com
- michael.rainey@rittmanmead.com
• Twitter

- @rittmanmead
- @apachekafka
- @mRainey

Oracle GoldenGate and Apache Kafka: A Deep Dive Into Real-Time Data Streaming

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Oracle GoldenGate and Apache Kafka: A Deep Dive Into Real-Time Data Streaming