oracle goldengate and apache kafka a deep dive into real-time data streaming
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Michael Rainey | Collaborate 16
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 Practice Lead - America- Oracle Data Integration expertise - Blog: http://ritt.md/mRainey - Oracle ACE
@mRainey
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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 what we excel at
•70+ consultants worldwide including 1 Oracle ACE Director and 3 Oracle ACEs, offering training courses, global services, and consulting
•Founded on the values of collaboration, learning, integrity and getting things done
Unlock the potential of your organization’s data
•Comprehensive service portfolio designed to support the full lifecycle of any analytics solution
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Visual Redesign Business User Training
Ongoing SupportEngagement Toolkit
Average user adoption for BI platforms is below 25%
Rittman Mead’s User Engagement Service can help
More info: http://ritt.md/ue
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Typical 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
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Relational Data Replication - Oracle GoldenGate
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Streaming Data - Apache Kafka
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“Publish-subscribe messaging rethought as a distributed commit log”
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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
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Let’s Jump Right In
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• An example…near and dear to my heartOne single view of the Oracle Data Integrator logs!
- Oracle Data Integrator session logs stored in the repository - ODI Agent logs are text based log files - To see the full picture of your ODI environment, they must be
combined
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oracle.com/technetwork/database/bigdata-appliance/downloads
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Oracle GoldenGate for Big Data - we talked about this…
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Extract from the ODI Repository with GoldenGate 12c
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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!
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Prepare the Database for GoldenGate Extract - OGG User
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Prepare the Database for GoldenGate Extract - Logging
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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- Many approaches to extract logs • Logstash- Part of the Elastic (formerly ELK) stack - Robin Moffatt blogged —> http://ritt.md/kafka-elk - Producer configuration for Kafka
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Logstash to Kafka - Setup and Startup
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• Startup Zookeeper- Already installed on Big Data Lite • Set Kafka server.properties- Broker ID - Number of partitions - Log retention period - Zookeeper connection • Start Kafka
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Setup Logstash Configuration File
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• Configuration File
• Start Logstash
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ODI Agent Logs to Kafka!
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• Start the Kafka Console Consumer - delivered with Kafka
• Start the ODI Agent and…messages!
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Oracle GoldenGate for Big Data
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• Kafka one of many handlers- HDFS, HBase, Flume • 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
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Oracle GoldenGate for Big Data - Kafka Handler
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• Standard GoldenGate Extract / Pump processes- We just set this up • Replicat parameter file & process group• Kakfa Handler configuration• Kafka Producer properties- Note: Kafka 0.8.2.0 & 0.8.2.1 are certified with GoldenGate
• But, I’ve heard 0.9.0+ works…
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GoldenGate and Kafka…Prerequisites
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• Zookeeper & Kafka up and running• Add topic to broker up front vs dynamically• Kafka Handler must have access to broker server• Kafka libraries must match Kafka version
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GoldenGate and Kafka…Kafka Handler Properties
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• Properties allow communication between the GoldenGate adapter and Kafka
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GoldenGate and Kafka…Kafka Handler Properties
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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 = json- Pluggable Formatter - Avro recommended for Kafka… • gg.handler.kafkahandler.BlockingSend = true|false • gg.handler.kafkahandler.includeTokens = true|false • gg.handler.kafkahandler.mode = tx- Transaction vs Operation mode
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GoldenGate and Kafka…Kafka Handler Properties
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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
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GoldenGate and Kafka…Kafka Producer Configuration
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• Access to the Kafka producer configuration parameters
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GoldenGate and Kafka…Startup
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• Create a topic in Kakfa
• Add Replicat process group to GoldenGate on target
• Start Kafka console consumer
• Start GoldenGate extract/pump on source, replicat on target
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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
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GoldenGate Big Data Adapter Challenges
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• GoldenGate could be a single point of failure - Kafka is a fault-tolerant, distributed system • Source transactions may end up larger than expected - max.request.size • Need for speed?- batch.size - linger.ms
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Why GoldenGate with Kafka?
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• GoldenGate…- is non-invasive - has checkpoints for recovery - moves data quickly
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In conclusion
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• The new data challenge, not quite as challenging with Kafka- Kafka as the raw data reservoir?
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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
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