Improved README and added blank templates for config files.

.gitignore

@@ -5,3 +5,5 @@ work
 .DS_Store
 third_party/libmesos.so
 third_party/libmesos.dylib
+conf/java-opts
+conf/spark-env.sh

README

@@ -5,7 +5,7 @@ Spark requires Scala 2.8. This version has been tested with 2.8.0.final.
 To build and run Spark, you will need to have Scala's bin in your $PATH,
 or you will need to set the SCALA_HOME environment variable to point
 to where you've installed Scala. Scala must be accessible through one
-of these methods on Nexus slave nodes as well as on the master.
+of these methods on Mesos slave nodes as well as on the master.
 
 To build Spark and the example programs, run make.
 
@@ -13,6 +13,10 @@ To run one of the examples, use ./run <class> <params>. For example,
 ./run SparkLR will run the Logistic Regression example. Each of the
 example programs prints usage help if no params are given.
 
+All of the Spark samples take a <host> parameter that is the Mesos master
+to connect to. This can be a Mesos URL, or "local" to run locally with one
+thread, or "local[N]" to run locally with N threads.
+
 Tip: If you are building Spark and examples repeatedly, export USE_FSC=1
 to have the Makefile use the fsc compiler daemon instead of scalac.
 

conf/spark-env.sh

+#!/usr/bin/env bash
+
+# Set Spark environment variables for your site in this file. Some useful
+# variables to set are:
+# - MESOS_HOME, to point to your Mesos installation
+# - SCALA_HOME, to point to your Scala installation
+# - SPARK_CLASSPATH, to add elements to Spark's classpath
+# - SPARK_JAVA_OPTS, to add JVM options
+# - SPARK_MEM, to change the amount of memory used per node (this should
+#   be in the same format as the JVM's -Xmx option, e.g. 300m or 1g).
+# - SPARK_LIBRARY_PATH, to add extra search paths for native libraries.
+
+