[GitHub] spark pull request: [SPARK-1946] Submit tasks after (configured ra...

[tgravescs <gi...@git.apache.org>]

Github user tgravescs commented on a diff in the pull request:

    https://github.com/apache/spark/pull/900#discussion_r14764078
  
    --- Diff: core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala ---
    @@ -46,9 +46,19 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, actorSystem: A
     {
       // Use an atomic variable to track total number of cores in the cluster for simplicity and speed
       var totalCoreCount = new AtomicInteger(0)
    +  var totalExpectedExecutors = new AtomicInteger(0)
       val conf = scheduler.sc.conf
       private val timeout = AkkaUtils.askTimeout(conf)
       private val akkaFrameSize = AkkaUtils.maxFrameSizeBytes(conf)
    +  // Submit tasks only after (registered executors / total expected executors) 
    +  // is equal to at least this value, that is double between 0 and 1.
    +  var minRegisteredRatio = conf.getDouble("spark.scheduler.minRegisteredExecutorsRatio", 0)
    --- End diff --
    
    Please add the new configs to the user docs - see docs/configuration.md


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