To set the number of spark cores used you must set two parameters in the actual
spark-submit script. You must set num-executors (the number of nodes to have)
and executor-cores (the number of cores per machinel) . Please see the Spark
configuration and tuning pages for more details.
-Original Message-
From: ll [duy.huynh@gmail.com<mailto:duy.huynh@gmail.com>]
Sent: Saturday, November 08, 2014 12:05 AM Eastern Standard Time
To: u...@spark.incubator.apache.org
Subject: Re: Fwd: Why is Spark not using all cores on a single machine?
hi. i did use local[8] as below, but it still ran on only 1 core.
val sc = new SparkContext(new
SparkConf().setMaster("local[8]").setAppName("abc"))
any advice is much appreciated.
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