Add link to the the blog entry on building a Spark perf lab

README.md

@@ -42,11 +42,12 @@ and spark-shell/pyspark environments.
 
 
 ### Resources   
-  - [TPCDS PySpark](https://github.com/LucaCanali/Miscellaneous/tree/master/Performance_Testing/TPCDS_PySpark) - A tool you can use run TPCDS with PySpark, instrumented with sparkMeasure
-  - [Spark monitoring dashboard](https://github.com/cerndb/spark-dashboard) - A custom monitoring pipeline and dashboard for Spark  
-  - [Introductory course on Apache Spark](https://sparktraining.web.cern.ch/)
-  - [Flamegraphs for profiling Spark jobs](https://github.com/LucaCanali/Miscellaneous/blob/master/Spark_Notes/Tools_Spark_Pyroscope_FlameGraph.md)
-  - [Notes on Apache Spark](https://github.com/LucaCanali/Miscellaneous/tree/master/Spark_Notes)
+- Blog on [building an Apache Spark Performance Lab](https://db-blog.web.cern.ch/node/195)
+- [TPCDS PySpark](https://github.com/LucaCanali/Miscellaneous/tree/master/Performance_Testing/TPCDS_PySpark) - A tool you can use run TPCDS with PySpark, instrumented with sparkMeasure
+- [Spark monitoring dashboard](https://github.com/cerndb/spark-dashboard) - A custom monitoring pipeline and dashboard for Spark  
+- [Introductory course on Apache Spark](https://sparktraining.web.cern.ch/)
+- [Flamegraphs for profiling Spark jobs](https://github.com/LucaCanali/Miscellaneous/blob/master/Spark_Notes/Tools_Spark_Pyroscope_FlameGraph.md)
+- [Notes on Apache Spark](https://github.com/LucaCanali/Miscellaneous/tree/master/Spark_Notes)
 
 Main author and contact: Luca.Canali@cern.ch