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Diffstat (limited to 'README.md')
| -rw-r--r-- | README.md | 6 |
1 files changed, 5 insertions, 1 deletions
@@ -20,7 +20,7 @@ To build Spark and its example programs, run: sbt/sbt update compile -To run Spark, you will need to have Scala's bin in your $PATH, or you +To 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 Mesos slave nodes as well as on the master. @@ -48,11 +48,15 @@ In `java-opts`, you can add flags to be passed to the JVM when running Spark. In `spark-env.sh`, you can set any environment variables you wish to be available when running Spark programs, such as `PATH`, `SCALA_HOME`, etc. There are also several Spark-specific variables you can set: + - `SPARK_CLASSPATH`: Extra entries to be added to the classpath, separated by ":". + - `SPARK_MEM`: Memory for Spark to use, in the format used by java's `-Xmx` option (for example, `-Xmx200m` meams 200 MB, `-Xmx1g` means 1 GB, etc). + - `SPARK_LIBRARY_PATH`: Extra entries to add to `java.library.path` for locating shared libraries. + - `SPARK_JAVA_OPTS`: Extra options to pass to JVM. Note that `spark-env.sh` must be a shell script (it must be executable and start |