This document discusses exactly once semantics in Apache Kafka 0.11. It provides an overview of how Kafka achieved exactly once delivery between producers and consumers. Key points include:
- Kafka 0.11 introduced exactly once semantics with changes to support transactions and deduplication.
- Producers can write in a transactional fashion and receive acknowledgments of committed writes from brokers.
- Brokers store commit markers to track the progress of transactions and ensure no data loss during failures.
- Consumers can read from brokers in a transactional mode and receive data only from committed transactions, guaranteeing no duplication of records.
- This allows reliable message delivery semantics between producers and consumers with Kafka acting as
In the first half, we give an introduction to modern serialization systems, Protocol Buffers, Apache Thrift and Apache Avro. Which one does meet your needs?
In the second half, we show an example of data ingestion system architecture using Apache Avro.
In the first half, we give an introduction to modern serialization systems, Protocol Buffers, Apache Thrift and Apache Avro. Which one does meet your needs?
In the second half, we show an example of data ingestion system architecture using Apache Avro.
The document discusses custom management applications developed for Apache Kafka. It describes applications called KafkaTopicManageApp and KafkaAclManageApp that use the Apache Kafka AdminClient to manage topics and ACLs in an idempotent way based on application and target configuration files. This allows operations to be reviewed and applied automatically through continuous integration to keep the Kafka cluster configuration in sync with the defined settings.
Stream processing is designed for continuously processing unbounded data streams. It allows for unbounded data inputs and continuous processing, unlike batch processing which requires bounded, finite data sets. The key challenges of stream processing include out-of-order data arrival and needing to relate events that occur close together in time but may be processed out of order. To address this, stream processing systems use watermarks to indicate processing progress, triggers to determine output timing, and accumulation to handle refinements from late data.