mirror of https://github.com/apache/druid.git
35 lines
1.9 KiB
Markdown
35 lines
1.9 KiB
Markdown
|
---
|
||
|
|
id: streaming
|
||
|
|
title: "Streaming ingestion"
|
||
|
|
---
|
||
|
|
|
||
|
|
<!--
|
||
|
|
~ Licensed to the Apache Software Foundation (ASF) under one
|
||
|
|
~ or more contributor license agreements. See the NOTICE file
|
||
|
|
~ distributed with this work for additional information
|
||
|
|
~ regarding copyright ownership. The ASF licenses this file
|
||
|
|
~ to you under the Apache License, Version 2.0 (the
|
||
|
|
~ "License"); you may not use this file except in compliance
|
||
|
|
~ with the License. You may obtain a copy of the License at
|
||
|
|
~
|
||
|
|
~ http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
~
|
||
|
|
~ Unless required by applicable law or agreed to in writing,
|
||
|
|
~ software distributed under the License is distributed on an
|
||
|
|
~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
||
|
|
~ KIND, either express or implied. See the License for the
|
||
|
|
~ specific language governing permissions and limitations
|
||
|
|
~ under the License.
|
||
|
|
-->
|
||
|
|
|
||
|
|
Apache Druid can consume data streams from the following external streaming sources:
|
||
|
|
|
||
|
|
* Apache Kafka through the bundled [Kafka indexing service](kafka-ingestion.md) extension.
|
||
|
|
* Amazon Kinesis through the bundled [Kinesis indexing service](kinesis-ingestion.md) extension.
|
||
|
|
|
||
|
|
Each indexing service provides real-time data ingestion with exactly-once stream processing guarantee.
|
||
|
|
To use either of the streaming ingestion methods, you must first load the associated extension on both the Overlord and the MiddleManager. See [Loading extensions](../configuration/extensions.md#loading-extensions) for more information.
|
||
|
|
|
||
|
|
Streaming ingestion is controlled by a continuously running [supervisor](supervisor.md).
|
||
|
|
The supervisor oversees the state of indexing tasks to coordinate handoffs, manage failures, and ensure that scalability and replication requirements are maintained.
|
||
|
|
You start a supervisor by submitting a JSON specification, often referred to as the supervisor spec, either though the Druid web console or using the [Supervisor API](../api-reference/supervisor-api.md).
|