317brian commented on code in PR #18252: URL: https://github.com/apache/druid/pull/18252#discussion_r2224260215
########## docs/querying/dart.md: ########## @@ -0,0 +1,101 @@ +--- +id: dart +title: "SQL queries using the Dart query engine" +sidebar_label: "Dart query engine" +description: Use the Dart query engine for light-weight queries that don't need all the capabilities of the MSQ task engine. +--- + +import Tabs from '@theme/Tabs'; +import TabItem from '@theme/TabItem'; + +:::info[Experimental] + +Dart is experimental. For production use, we recommend using the other available query engines. + +::: + + +Use the Dart query engine for light-weight queries that don't need all the capabilities of the MSQ task engine. For example, use Dart for GROUP BY queries that have intermediate results consisting of hundreds of millions of rows. In this case, the Dart engine's multi-threaded workers perform in-memory shuffles using locally cached data without pulling from deep storage. + +You can query batch or realtime datasources with Dart. + +## Enable Dart + +To enable Dart, add the following line to your `broker/runtime.properties` and `historical/runtime.properties` files: + +``` +druid.msq.dart.enabled = true +``` + +### Additional configs Review Comment: ```suggestion ### Configure resource consumption ``` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
