tillrohrmann commented on a change in pull request #9760: 
[FLINK-13982][runtime] Implement memory calculation logics
URL: https://github.com/apache/flink/pull/9760#discussion_r329060662
 
 

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 File path: 
flink-runtime/src/main/java/org/apache/flink/runtime/clusterframework/TaskExecutorResourceUtils.java
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+/*
+ * 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.api.java.tuple.Tuple2;
+import org.apache.flink.api.java.tuple.Tuple6;
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.configuration.MemorySize;
+import org.apache.flink.configuration.TaskManagerOptions;
+import org.apache.flink.util.ConfigurationException;
+
+import static org.apache.flink.util.Preconditions.checkArgument;
+
+/**
+ * Utility class for TaskExecutor memory configurations.
+ */
+public class TaskExecutorResourceUtils {
+
+       private TaskExecutorResourceUtils() {}
+
+       // 
------------------------------------------------------------------------
+       //  Memory Configuration Calculations
+       // 
------------------------------------------------------------------------
+
+       public static TaskExecutorResourceSpec resourceSpecFromConfig(final 
Configuration config) throws ConfigurationException {
+               if (isTaskHeapMemorySizeExplicitlyConfigured(config) && 
isManagedMemorySizeExplicitlyConfigured(config)) {
+                       // both task heap memory and managed memory is 
configured, use these to derive total flink memory
+                       return 
deriveResourceSpecWithExplicitTaskAndManagedMemory(config);
+               } else if (isTotalFlinkMemorySizeExplicitlyConfigured(config)) {
+                       // total flink memory is configured, but not task heap 
and managed memory, derive from total flink memory
+                       return deriveResourceSpecWithTotalFlinkMemory(config);
+               } else if 
(isTotalProcessMemorySizeExplicitlyConfigured(config)) {
+                       return deriveResourceSpecWithTotalProcessMemory(config);
+               } else {
+                       throw new ConfigurationException("Either Task Heap 
Memory size and Managed Memory size, or Total Flink"
+                               + " Memory size, or Total Process Memory size 
need to be configured explicitly.");
+               }
+       }
+
+       private static TaskExecutorResourceSpec 
deriveResourceSpecWithExplicitTaskAndManagedMemory(final Configuration config) {
+               // derive total flink internal memory sizes from explicitly 
configure task heap memory size and managed memory size
+
+               final MemorySize frameworkHeapMemorySize = 
getFrameworkHeapMemorySize(config);
+               final MemorySize taskHeapMemorySize = 
getTaskHeapMemorySize(config);
+               final MemorySize taskOffHeapMemorySize = 
getTaskOffHeapMemorySize(config);
+
+               final MemorySize managedMemorySize = 
getManagedMemorySize(config);
+               final Tuple2<MemorySize, MemorySize> managedMemorySizeTuple2 = 
deriveOnHeapAndOffHeapManagedMemorySizeFromManagedMemorySize(config, 
managedMemorySize);
+               final MemorySize onHeapManagedMemorySize = 
managedMemorySizeTuple2.f0;
+               final MemorySize offHeapManagedMemorySize = 
managedMemorySizeTuple2.f1;
+
+               final MemorySize shuffleMemorySize = 
deriveShuffleMemoryWithInverseFraction(config,
+                       
frameworkHeapMemorySize.add(taskHeapMemorySize).add(taskOffHeapMemorySize).add(managedMemorySize));
+
+               // derive total flink external memory sizes from derived total 
flink memory size
+
+               final MemorySize totalFlinkMemorySize = frameworkHeapMemorySize
+                       .add(taskHeapMemorySize)
+                       .add(taskOffHeapMemorySize)
+                       .add(shuffleMemorySize)
+                       .add(managedMemorySize);
+
+               final Tuple2<MemorySize, MemorySize> 
totalFlinkExternalMemorySizeTuple2 = 
deriveTotalFlinkExternalMemorySizes(config, totalFlinkMemorySize);
+
+               return new TaskExecutorResourceSpec(
+                       frameworkHeapMemorySize,
+                       taskHeapMemorySize,
+                       taskOffHeapMemorySize,
+                       shuffleMemorySize,
+                       onHeapManagedMemorySize,
+                       offHeapManagedMemorySize,
+                       totalFlinkExternalMemorySizeTuple2.f0, // 
jvmMetaspaceSize
+                       totalFlinkExternalMemorySizeTuple2.f1); // 
jvmOverheadSize
+       }
+
+       private static TaskExecutorResourceSpec 
deriveResourceSpecWithTotalFlinkMemory(final Configuration config) {
+               // derive total flink internal memory sizes from explicitly 
configured total flink memory size
+
+               final MemorySize totalFlinkMemorySize = 
getTotalFlinkMemorySize(config);
+               final Tuple6<MemorySize, MemorySize, MemorySize, MemorySize, 
MemorySize, MemorySize> totalFLinkInternalMemorySizeTuple6 =
+                       deriveTotalFlinkInternalMemorySizes(config, 
totalFlinkMemorySize);
+
+               // derive total flink external memory sizes from explicitly 
configured total flink memory size
+               final Tuple2<MemorySize, MemorySize> 
totalFlinkExternalMemorySizeTuple2 =
+                       deriveTotalFlinkExternalMemorySizes(config, 
totalFlinkMemorySize);
+
+               return new TaskExecutorResourceSpec(
+                       totalFLinkInternalMemorySizeTuple6.f0, // 
frameworkHeapMemorySize
+                       totalFLinkInternalMemorySizeTuple6.f1, // 
taskHeapMemorySize
+                       totalFLinkInternalMemorySizeTuple6.f2, // 
taskOffHeapMemorySize
+                       totalFLinkInternalMemorySizeTuple6.f3, // 
shuffleMemorySize
+                       totalFLinkInternalMemorySizeTuple6.f4, // 
onHeapManagedMemorySize
+                       totalFLinkInternalMemorySizeTuple6.f5, // 
offHeapManagedMemorySize
+                       totalFlinkExternalMemorySizeTuple2.f0, // 
jvmMetaspaceSize
+                       totalFlinkExternalMemorySizeTuple2.f1); // 
jvmOverheadSize
+       }
+
+       private static TaskExecutorResourceSpec 
deriveResourceSpecWithTotalProcessMemory(final Configuration config) {
+               // derive total flink external memory sizes from explicitly 
configured total process memory size
+
+               final MemorySize totalProcessMemorySize = 
getTotalProcessMemorySize(config);
+               final MemorySize jvmMetaspaceSize = getJvmMetaspaceSize(config);
+               final MemorySize jvmOverheadSize = 
deriveJvmOverheadWithFraction(config, totalProcessMemorySize);
+
+               final MemorySize totalFlinkExternalMemorySize = 
jvmMetaspaceSize.add(jvmOverheadSize);
+               checkArgument(totalFlinkExternalMemorySize.getBytes() < 
totalProcessMemorySize.getBytes(),
+                       "Sum of configured JVM Metaspace (" + 
jvmMetaspaceSize.toString()
+                               + ") and JVM Overhead (" + 
jvmOverheadSize.toString()
+                               + ") exceed configured Total Process memory (" 
+ totalProcessMemorySize.toString() + ").");
+               final MemorySize totalFlinkMemorySize = 
totalProcessMemorySize.subtract(totalFlinkExternalMemorySize);
+
+               // derive total flink internal memory sizes from derived total 
flink memory size
+               final Tuple6<MemorySize, MemorySize, MemorySize, MemorySize, 
MemorySize, MemorySize> totalFLinkInternalMemorySizeTuple6 =
+                       deriveTotalFlinkInternalMemorySizes(config, 
totalFlinkMemorySize);
+
+               return new TaskExecutorResourceSpec(
+                       totalFLinkInternalMemorySizeTuple6.f0, // 
frameworkHeapMemorySize
+                       totalFLinkInternalMemorySizeTuple6.f1, // 
taskHeapMemorySize
+                       totalFLinkInternalMemorySizeTuple6.f2, // 
taskOffHeapMemorySize
+                       totalFLinkInternalMemorySizeTuple6.f3, // 
shuffleMemorySize
+                       totalFLinkInternalMemorySizeTuple6.f4, // 
onHeapManagedMemorySize
+                       totalFLinkInternalMemorySizeTuple6.f5, // 
offHeapManagedMemorySize
+                       jvmMetaspaceSize,
+                       jvmOverheadSize);
+       }
+
+       private static Tuple2<MemorySize, MemorySize> 
deriveTotalFlinkExternalMemorySizes(
+               final Configuration config, final MemorySize 
totalFlinkMemorySize) {
+               final MemorySize jvmMetaspaceSize = getJvmMetaspaceSize(config);
+               final MemorySize jvmOverheadSize = 
deriveJvmOverheadWithInverseFraction(config,
+                       totalFlinkMemorySize.add(jvmMetaspaceSize));
+               return new Tuple2<>(jvmMetaspaceSize, jvmOverheadSize);
+       }
+
+       private static Tuple6<MemorySize, MemorySize, MemorySize, MemorySize, 
MemorySize, MemorySize> deriveTotalFlinkInternalMemorySizes(
+               final Configuration config, final MemorySize 
totalFlinkMemorySize) {
+               final MemorySize frameworkHeapMemorySize = 
getFrameworkHeapMemorySize(config);
+               final MemorySize taskOffHeapMemorySize = 
getTaskOffHeapMemorySize(config);
+
+               final MemorySize shuffleMemorySize = 
deriveShuffleMemoryWithFraction(config, totalFlinkMemorySize);
+               final MemorySize managedMemorySize = 
deriveManagedMemoryAbsoluteOrWithFraction(config, totalFlinkMemorySize);
+
+               final MemorySize totalFlinkExceptTaskHeapMemorySize =
+                       
frameworkHeapMemorySize.add(taskOffHeapMemorySize).add(shuffleMemorySize).add(managedMemorySize);
+               checkArgument(totalFlinkExceptTaskHeapMemorySize.getBytes() < 
totalFlinkMemorySize.getBytes(),
+                       "Sum of configured Framework Heap Memory (" + 
frameworkHeapMemorySize.toString()
+                               + "), Task Off-Heap Memory (" + 
taskOffHeapMemorySize.toString()
+                               + "), Shuffle Memory (" + 
shuffleMemorySize.toString()
+                               + ") and Managed Memory (" + 
managedMemorySize.toString()
+                               + ") exceed configured Total Flink Memory (" + 
totalFlinkMemorySize.toString() + ").");
+               final MemorySize taskHeapMemorySize = 
totalFlinkMemorySize.subtract(totalFlinkExceptTaskHeapMemorySize);
+
+               final Tuple2<MemorySize, MemorySize> tuple2 = 
deriveOnHeapAndOffHeapManagedMemorySizeFromManagedMemorySize(config, 
managedMemorySize);
+               final MemorySize onHeapManagedMemorySize = tuple2.f0;
+               final MemorySize offHeapManagedMemorySize = tuple2.f1;
+
+               return new Tuple6<>(
+                       frameworkHeapMemorySize,
+                       taskHeapMemorySize,
+                       taskOffHeapMemorySize,
+                       shuffleMemorySize,
+                       onHeapManagedMemorySize,
+                       offHeapManagedMemorySize);
+       }
+
+       private static Tuple2<MemorySize, MemorySize> 
deriveOnHeapAndOffHeapManagedMemorySizeFromManagedMemorySize(
+               final Configuration config, final MemorySize managedMemorySize) 
{
+
+               double offheapFraction;
+               if (isManagedMemoryOffHeapFractionExplicitlyConfigured(config)) 
{
+                       offheapFraction = 
getManagedMemoryOffHeapFraction(config);
+               } else {
+                       final boolean legacyManagedMemoryOffHeap = 
config.getBoolean(TaskManagerOptions.MEMORY_OFF_HEAP);
+                       offheapFraction = legacyManagedMemoryOffHeap ? 1.0 : 
0.0;
+               }
+
+               final MemorySize offheapSize = 
managedMemorySize.multiply(offheapFraction);
+               final MemorySize onheapSize = 
managedMemorySize.subtract(offheapSize);
+               return new Tuple2<>(onheapSize, offheapSize);
+       }
+
+       private static MemorySize 
deriveManagedMemoryAbsoluteOrWithFraction(final Configuration config, final 
MemorySize base) {
+               if (isManagedMemorySizeExplicitlyConfigured(config)) {
+                       return getManagedMemorySize(config);
+               } else {
+                       return deriveWithFraction(base, 
getManagedMemoryRangeFraction(config));
+               }
+       }
+
+       private static MemorySize deriveShuffleMemoryWithFraction(final 
Configuration config, final MemorySize base) {
+               return deriveWithFraction(base, 
getShuffleMemoryRangeFraction(config));
+       }
+
+       private static MemorySize deriveShuffleMemoryWithInverseFraction(final 
Configuration config, final MemorySize base) {
+               return deriveWithInverseFraction(base, 
getShuffleMemoryRangeFraction(config));
+       }
+
+       private static MemorySize deriveJvmOverheadWithFraction(final 
Configuration config, final MemorySize base) {
+               return deriveWithFraction(base, 
getJvmOverheadRangeFraction(config));
+       }
+
+       private static MemorySize deriveJvmOverheadWithInverseFraction(final 
Configuration config, final MemorySize base) {
+               return deriveWithInverseFraction(base, 
getJvmOverheadRangeFraction(config));
+       }
+
+       private static MemorySize deriveWithFraction(final MemorySize base, 
final RangeFraction rangeFraction) {
+               final long relative = (long) (rangeFraction.fraction * 
base.getBytes());
+               return new 
MemorySize(Math.max(rangeFraction.minSize.getBytes(), 
Math.min(rangeFraction.maxSize.getBytes(), relative)));
+       }
+
+       private static MemorySize deriveWithInverseFraction(final MemorySize 
base, final RangeFraction rangeFraction) {
+               checkArgument(rangeFraction.fraction < 1);
+               final long relative = (long) (rangeFraction.fraction / (1 - 
rangeFraction.fraction) * base.getBytes());
+               return new 
MemorySize(Math.max(rangeFraction.minSize.getBytes(), 
Math.min(rangeFraction.maxSize.getBytes(), relative)));
+       }
+
+       private static MemorySize getFrameworkHeapMemorySize(final 
Configuration config) {
+               return 
MemorySize.parse(config.getString(TaskManagerOptions.FRAMEWORK_HEAP_MEMORY));
+       }
+
+       private static MemorySize getTaskHeapMemorySize(final Configuration 
config) {
+               checkArgument(isTaskHeapMemorySizeExplicitlyConfigured(config));
+               return 
MemorySize.parse(config.getString(TaskManagerOptions.TASK_HEAP_MEMORY));
+       }
+
+       private static MemorySize getTaskOffHeapMemorySize(final Configuration 
config) {
+               return 
MemorySize.parse(config.getString(TaskManagerOptions.TASK_OFF_HEAP_MEMORY));
+       }
+
+       private static MemorySize getManagedMemorySize(final Configuration 
config) {
+               checkArgument(isManagedMemorySizeExplicitlyConfigured(config));
+               return 
MemorySize.parse(config.getString(TaskManagerOptions.MANAGED_MEMORY_SIZE));
+       }
+
+       private static RangeFraction getManagedMemoryRangeFraction(final 
Configuration config) {
+               final MemorySize minSize = new MemorySize(0);
+               final MemorySize maxSize = new MemorySize(Long.MAX_VALUE);
+               final double fraction = 
config.getFloat(TaskManagerOptions.MANAGED_MEMORY_FRACTION);
 
 Review comment:
   What happens if the user has `LEGACY_MANAGED_MEMORY_FRACTION` configured? 
Don't we want to support backwards compatibility?

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