clarification about spark separate installation

EIS-Bonn · May 14, 2018 · 6623f2b · 6623f2b
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@@ -13,7 +13,7 @@ cd target/scala-xyz # xyz is the version of Scala installed
 ```
 ...you find a *sparkall_01.jar* file.
 
-- Sparkall uses Spark as query engine. Therefore Spark has to be installed beforehand. Download Spark from the [official website](https://spark.apache.org/downloads.html). Then configure a standalone cluster using the [official documentation page](https://spark.apache.org/docs/2.2.0/spark-standalone.html).
+- Sparkall uses Spark as query engine. Therefore Spark has to be installed beforehand. Download Spark from the [official website](https://spark.apache.org/downloads.html). In order for Sparkall to run in a cluster, you need to cnfigure a standalone cluster using the [official documentation page](https://spark.apache.org/docs/2.2.0/spark-standalone.html). Spark may come included with Sparkall in the future, but for now, it has to be separetly installed.
 
 - Now you can run Sparkall using `spark-submit` giving in args three files ---built using [Sparkall-GUI](https://github.com/EIS-Bonn/sparkall-gui) (see below).
 The command line looks like: