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From tillrohrmann <...@git.apache.org>
Subject [GitHub] flink pull request: [FLINK-3544] Introduce ResourceManager compone...
Date Tue, 15 Mar 2016 16:45:23 GMT
Github user tillrohrmann commented on a diff in the pull request:

    https://github.com/apache/flink/pull/1741#discussion_r56197090
  
    --- Diff: flink-runtime/src/main/java/org/apache/flink/runtime/clusterframework/ContaineredTaskManagerParameters.java
---
    @@ -0,0 +1,182 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one
    + * or more contributor license agreements.  See the NOTICE file
    + * distributed with this work for additional information
    + * regarding copyright ownership.  The ASF licenses this file
    + * to you under the Apache License, Version 2.0 (the
    + * "License"); you may not use this file except in compliance
    + * with the License.  You may obtain a copy of the License at
    + *
    + *     http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +
    +package org.apache.flink.runtime.clusterframework;
    +
    +import org.apache.flink.configuration.ConfigConstants;
    +import org.apache.flink.configuration.Configuration;
    +
    +import java.util.HashMap;
    +import java.util.Map;
    +
    +/**
    + * This class describes the basic parameters for launching a TaskManager process.
    + */
    +public class ContaineredTaskManagerParameters implements java.io.Serializable {
    +
    +	private static final long serialVersionUID = -3096987654278064670L;
    +	
    +	/** Total container memory, in bytes */
    +	private final long totalContainerMemoryMB;
    +
    +	/** Heap size to be used for the Java process */
    +	private final long taskManagerHeapSizeMB;
    +
    +	/** Direct memory limit for the Java process */
    +	private final long taskManagerDirectMemoryLimitMB;
    +
    +	/** The number of slots per TaskManager */
    +	private final int numSlots;
    +	
    +	/** Environment variables to add to the Java process */
    +	private final HashMap<String, String> taskManagerEnv;
    +
    +	
    +	public ContaineredTaskManagerParameters(
    +		long totalContainerMemoryMB, long taskManagerHeapSizeMB,
    +		long taskManagerDirectMemoryLimitMB,
    +		int numSlots,
    +		HashMap<String, String> taskManagerEnv)
    +	{
    +		this.totalContainerMemoryMB = totalContainerMemoryMB;
    +		this.taskManagerHeapSizeMB = taskManagerHeapSizeMB;
    +		this.taskManagerDirectMemoryLimitMB = taskManagerDirectMemoryLimitMB;
    +		this.numSlots = numSlots;
    +		this.taskManagerEnv = taskManagerEnv;
    +	}
    +	
    +	// ------------------------------------------------------------------------
    +
    +	public long taskManagerTotalMemoryMB() {
    +		return totalContainerMemoryMB;
    +	}
    +
    +	public long taskManagerHeapSizeMB() {
    +		return taskManagerHeapSizeMB;
    +	}
    +
    +	public long taskManagerDirectMemoryLimitMB() {
    +		return taskManagerDirectMemoryLimitMB;
    +	}
    +
    +	public int numSlots() {
    +		return numSlots;
    +	}
    +
    +	public Map<String, String> taskManagerEnv() {
    +		return taskManagerEnv;
    +	}
    +
    +
    +	// ------------------------------------------------------------------------
    +	
    +	@Override
    +	public String toString() {
    +		return "TaskManagerParameters {" +
    +			"totalContainerMemory=" + totalContainerMemoryMB +
    +			", taskManagerHeapSize=" + taskManagerHeapSizeMB +
    +			", taskManagerDirectMemoryLimit=" + taskManagerDirectMemoryLimitMB +
    +			", numSlots=" + numSlots +
    +			", taskManagerEnv=" + taskManagerEnv +
    +			'}';
    +	}
    +
    +	// ------------------------------------------------------------------------
    +	//  Factory
    +	// ------------------------------------------------------------------------
    +	
    +	/**
    +	 * Computes the parameters to be used to start a TaskManager Java process.
    +	 *
    +	 * @param config The Flink configuration.
    +	 * @param containerMemoryMB The size of the complete container, in megabytes.
    +	 * @return The parameters to start the TaskManager processes with.
    +	 */
    +	public static ContaineredTaskManagerParameters create(
    +		Configuration config, long containerMemoryMB, int numSlots)
    +	{
    +		// (1) compute how much memory we subtract from the total memory, to get the Java memory
    +
    +		final float memoryCutoffRatio = config.getFloat(
    +			ConfigConstants.CONTAINERED_HEAP_CUTOFF_RATIO,
    +			ConfigConstants.DEFAULT_YARN_HEAP_CUTOFF_RATIO);
    +
    +		final int minCutoff = config.getInteger(
    +			ConfigConstants.CONTAINERED_HEAP_CUTOFF_MIN,
    +			ConfigConstants.DEFAULT_YARN_HEAP_CUTOFF);
    +
    +		if (memoryCutoffRatio > 1 || memoryCutoffRatio < 0) {
    --- End diff --
    
    Do we allow a `memoryCutoffRatio` of `1`?


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