Config parameters are in place. Good to go (I think)

src/scala/spark/LocalFileShuffle.scala

@@ -84,13 +84,13 @@ class LocalFileShuffle[K, V, C] extends Shuffle[K, V, C] with Logging {
       splitsInRequestBitVector = new BitSet (totalSplits)
       combiners = new HashMap[K, C]
       
-      // TODO: Fix config param
-      var threadPool = LocalFileShuffle.newDaemonFixedThreadPool (2)      
+      var threadPool = 
+        LocalFileShuffle.newDaemonFixedThreadPool (LocalFileShuffle.MaxTxPeers)
         
       while (hasSplits < totalSplits) {
-        // TODO:
-        var numThreadsToCreate =
-          Math.min (totalSplits, 2) - threadPool.getActiveCount      
+        var numThreadsToCreate = 
+          Math.min (totalSplits, LocalFileShuffle.MaxTxPeers) - 
+          threadPool.getActiveCount
       
         while (hasSplits < totalSplits && numThreadsToCreate > 0) {        
           // Select a random split to pull
@@ -112,8 +112,8 @@ class LocalFileShuffle[K, V, C] extends Shuffle[K, V, C] with Logging {
           numThreadsToCreate = numThreadsToCreate - 1
         }
         
-        // TODO:
-        Thread.sleep (1000)
+        // Sleep for a while before creating new threads
+        Thread.sleep (LocalFileShuffle.MinKnockInterval)
       }
       
       threadPool.shutdown
@@ -162,9 +162,7 @@ class LocalFileShuffle[K, V, C] extends Shuffle[K, V, C] with Logging {
       }
       
       var timeOutTimer = new Timer
-      // TODO: Set wait timer
-      // TODO: If its too small, things FAIL
-      timeOutTimer.schedule (timeOutTask, 5000)
+      timeOutTimer.schedule (timeOutTask, LocalFileShuffle.MaxKnockInterval)
       
       logInfo ("ShuffleClient started... => %s:%d#%s".format(hostAddress, listenPort, requestPath))
       
@@ -201,8 +199,6 @@ class LocalFileShuffle[K, V, C] extends Shuffle[K, V, C] with Logging {
             }
           }
           
-          logInfo ("Finished reading " + requestPath)
-
           // Now add this to combiners
           val inputStream = new ObjectInputStream (
             new ByteArrayInputStream(byteArray))
@@ -221,8 +217,6 @@ class LocalFileShuffle[K, V, C] extends Shuffle[K, V, C] with Logging {
           }
           inputStream.close
           
-          logInfo ("Finished combining " + requestPath)
-
           // Reception completed. Update stats.
           hasSplitsBitVector.synchronized {
             hasSplitsBitVector.set (splitIndex)
@@ -275,6 +269,14 @@ class LocalFileShuffle[K, V, C] extends Shuffle[K, V, C] with Logging {
 }
 
 object LocalFileShuffle extends Logging {
+  // Used thoughout the code for small and large waits/timeouts
+  private var MinKnockInterval_ = 1000
+  private var MaxKnockInterval_ = 5000
+  
+  // Maximum number of receiving and sending threads
+  private var MaxRxPeers_ = 4
+  private var MaxTxPeers_ = 4  
+  
   private var initialized = false
   private var nextShuffleId = new AtomicLong(0)
 
@@ -290,6 +292,17 @@ object LocalFileShuffle extends Logging {
   
   private def initializeIfNeeded() = synchronized {
     if (!initialized) {
+      // Load config parameters
+      MinKnockInterval_ =
+        System.getProperty ("spark.shuffle.MinKnockInterval", "1000").toInt
+      MaxKnockInterval_ =
+        System.getProperty ("spark.shuffle.MaxKnockInterval", "5000").toInt
+
+      MaxRxPeers_ =
+        System.getProperty ("spark.shuffle.MaxRxPeers", "4").toInt
+      MaxTxPeers_ =
+        System.getProperty ("spark.shuffle.MaxTxPeers", "4").toInt
+        
       // TODO: localDir should be created by some mechanism common to Spark
       // so that it can be shared among shuffle, broadcast, etc
       val localDirRoot = System.getProperty("spark.local.dir", "/tmp")
@@ -330,6 +343,12 @@ object LocalFileShuffle extends Logging {
     }
   }
   
+  def MinKnockInterval = MinKnockInterval_
+  def MaxKnockInterval = MaxKnockInterval_
+  
+  def MaxRxPeers = MaxRxPeers_
+  def MaxTxPeers = MaxTxPeers_   
+  
   def getOutputFile(shuffleId: Long, inputId: Int, outputId: Int): File = {
     initializeIfNeeded()
     val dir = new File(shuffleDir, shuffleId + "/" + inputId)
@@ -365,8 +384,7 @@ object LocalFileShuffle extends Logging {
   
   class ShuffleServer
   extends Thread with Logging {
-    // TODO: Set config param
-    var threadPool = newDaemonFixedThreadPool(2)
+    var threadPool = newDaemonFixedThreadPool(LocalFileShuffle.MaxRxPeers)
 
     var serverSocket: ServerSocket = null