[GitHub] [arrow-datafusion] houqp commented on a change in pull request #775: Add Ballista examples

[GitBox <gi...@apache.org>]

houqp commented on a change in pull request #775:
URL: https://github.com/apache/arrow-datafusion/pull/775#discussion_r677097840



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File path: ballista/README.md
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@@ -35,9 +35,30 @@ Ballista can be deployed as a standalone cluster and also supports [Kubernetes](
 case, the scheduler can be configured to use [etcd](https://etcd.io/) as a backing store to (eventually) provide
 redundancy in the case of a scheduler failing.
 
+# Getting Started
+
+Fully working examples are available. Refer to the [Ballista Examples README](../ballista-examples/README.md) for 
+more information.
+
+## Distributed Scheduler Overview
+
+Ballista uses the DataFusion query execution framework to create a physical plan and then transforms it into a 
+distributed physical plan by breaking the query down into stages whenever the partitioning scheme changes.
+
+Specifically, any `RepartitionExec` operatoris is replaced with an `UnresolvedShuffleExec` and the child operator 

Review comment:
       we have an extra is here right?




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