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English
  • PowerExchange CDC Publisher 1.0
  • All Products

Table of Contents

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  1. Preface
  2. PowerExchange CDC Publisher Overview
  3. Installing and Upgrading PowerExchange CDC Publisher
  4. PowerExchange CDC Publisher Key Concepts
  5. PowerExchange Change Capture Environment
  6. Apache Kafka Targets
  7. Configuring PowerExchange CDC Publisher
  8. Streaming Change Data
  9. Monitoring PowerExchange CDC Publisher
  10. Administering PowerExchange CDC Publisher
  11. Command Reference for the Command-Line Utilities
  12. Avro Schema Formats

User Guide

User Guide

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Apache Kafka Data-Streaming Considerations

Apache Kafka Data-Streaming Considerations

The following data-streaming considerations and limitations apply to Kafka targets:
  • The Kafka producer.properties file controls PowerExchange CDC Publisher connectivity to Kafka.
  • The PowerExchange CDC Publisher supports Kafka primitive datatypes except FLOAT and DOUBLE. Also, the CDC Publisher tries to convert logical types for dates, times, timestamps, and decimal values on a best effort basis if you set the Formatter.avroUseLogical
    type
     property to true in the cdcPublisherAvro.cfg configuration file, where
    type
     is Date, Decimal, TimeMillis, TimeMicros, TimestampMillis, TimestampMicros. The CDC Publisher does not support complex types.
    The FLOAT and DOUBLE types are not supported because the CDC Publisher converts all source data to characters in Kafka messages. Any subsequent attempt to convert the character data to FLOAT or DOUBLE would decrease data accuracy and precision.
  • To minimize the risk of duplicate or missing messages on the Kafka target after a network outage, ensure that the Connector.kafkaProducerGuaranteeDelivery property is enabled. This property is enabled by default. Guaranteed delivery provides the highest level of data integrity but might degrade performance. You can disable guaranteed delivery by setting the Connector.kafkaProducerGuaranteeDelivery property to false in the cdcPublisherKafka.cfg configuration file.
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