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