mirror of https://github.com/apache/druid.git
45 lines
2.1 KiB
Markdown
45 lines
2.1 KiB
Markdown
---
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layout: doc_page
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title: "Realtime Process"
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---
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Older versions of Apache Druid (incubating) supported a standalone 'Realtime' process to query and index 'stream pull'
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modes of real-time ingestion. These processes would periodically build segments for the data they had collected over
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some span of time and then set up hand-off to [Historical](../design/historical.html) servers.
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This processes could be invoked by
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```
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org.apache.druid.cli.Main server realtime
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```
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This model of stream pull ingestion was deprecated for a number of both operational and architectural reasons, and
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removed completely in Druid 0.16.0. Operationally, realtime nodes were difficult to configure, deploy, and scale because
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each node required an unique configuration. The design of the stream pull ingestion system for realtime nodes also
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suffered from limitations which made it not possible to achieve exactly once ingestion.
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The extensions `druid-kafka-eight`, `druid-kafka-eight-simpleConsumer`, `druid-rabbitmq`, and `druid-rocketmq` were also
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removed at this time, since they were built to operate on the realtime nodes.
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Please consider using the [Kafka Indexing Service](../development/extensions-core/kafka-ingestion.html) or
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[Kinesis Indexing Service](../development/extensions-core/kinesis-ingestion.md) for stream pull ingestion instead.
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