The application web UI at lists Spark properties in the “Environment” tab. Like “”, this kind of properties can be set in either way.

Setting programmatically through SparkConf in runtime, or the behavior is depending on whichĬluster manager and deploy mode you choose, so it would be suggested to set through configurationįile or spark-submit command line options another is mainly related to Spark runtime control, “”, “”, this kind of properties may not be affected when Spark properties mainly can be divided into two kinds: one is related to deploy, like Precedence than any instance of the newer key. Versions of Spark in such cases, the older key names are still accepted, but take lower A few configuration keys have been renamed since earlier Take highest precedence, then flags passed to spark-submit or spark-shell, then options rializer .KryoSerializerĪny values specified as flags or in the properties file will be passed on to the applicationĪnd merged with those specified through SparkConf. bin/spark-submit -help will show the entire list of these options.īin/spark-submit will also read configuration options from conf/nf, in whichĮach line consists of a key and a value separated by whitespace. spark-submit can accept any Spark property using the -confįlag, but uses special flags for properties that play a part in launching the Spark application. Tool support two ways to load configurations dynamically. conf '=-XX:+PrintGCDetails -XX:+PrintGCTimeStamps' myApp.jar bin/spark-submit -name 'My app' -master local -conf = false Then, you can supply configuration values at runtime. Spark allows you to simply create an empty conf: val sc = new SparkContext ( new SparkConf ()) Instance, if you’d like to run the same application with different masters or differentĪmounts of memory. In some cases, you may want to avoid hard-coding certain configurations in a SparkConf. See documentation of individual configuration properties. While numbers without units are generally interpreted as bytes, a few are interpreted as KiB or MiB. The following format is accepted: 1b (bytes)

Properties that specify a byte size should be configured with a unit of size. The following format is accepted: 25ms (milliseconds) Properties that specify some time duration should be configured with a unit of time. Note that we can have more than 1 thread in local mode, and in cases like Spark Streaming, we mayĪctually require more than 1 thread to prevent any sort of starvation issues. setAppName ( 'CountingSheep' ) val sc = new SparkContext ( conf ) Which can help detect bugs that only exist when we run in a distributed context. Note that we run with local, meaning two threads - which represents “minimal” parallelism, For example, we could initialize an application with two threads as follows: master URL and application name), as well as arbitrary key-value pairs through the SparkConf allows you to configure some of the common properties These properties can be set directly on a Spark properties control most application settings and are configured separately for eachĪpplication. Logging can be configured through log4j.properties.The IP address, through the conf/spark-env.sh script on each node. Environment variables can be used to set per-machine settings, such as.Spark properties control most application parameters and can be set by using.Spark provides three locations to configure the system:

Inheriting Hadoop Cluster Configuration.

Set for iwork 3.2