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https://issues.apache.org/jira/browse/YARN-4597?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15658380#comment-15658380
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ASF GitHub Bot commented on YARN-4597:
--------------------------------------
Github user xslogic commented on a diff in the pull request:
https://github.com/apache/hadoop/pull/143#discussion_r87670013
--- Diff:
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/scheduler/ResourceUtilizationManager.java
---
@@ -0,0 +1,163 @@
+/**
+ * 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.hadoop.yarn.server.nodemanager.containermanager.scheduler;
+
+import org.apache.hadoop.yarn.api.records.ExecutionType;
+import org.apache.hadoop.yarn.api.records.Resource;
+import org.apache.hadoop.yarn.api.records.ResourceUtilization;
+import
org.apache.hadoop.yarn.server.api.records.OpportunisticContainersStatus;
+import
org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container;
+import
org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainersMonitor;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This class abstracts out how a container contributes to Resource
Utilization.
+ * It is used by the {@link ContainerScheduler} to determine which
+ * OPPORTUNISTIC containers to be killed to make room for a GUARANTEED
+ * container.
+ * It currently equates resource utilization with the total resource
allocated
+ * to the container. Another implementation might choose to use the actual
+ * resource utilization.
+ */
+
+public class ResourceUtilizationManager {
+
+ private static final Logger LOG =
+ LoggerFactory.getLogger(ResourceUtilizationManager.class);
+
+ private ResourceUtilization containersAllocation;
+ private ContainerScheduler scheduler;
+
+ ResourceUtilizationManager(ContainerScheduler scheduler) {
+ this.containersAllocation = ResourceUtilization.newInstance(0, 0,
0.0f);
+ this.scheduler = scheduler;
+ }
+
+ /**
+ * Get the current accumulated utilization. Currently it is the
accumulation
+ * of totally allocated resources to a container.
+ * @return ResourceUtilization Resource Utilization.
+ */
+ public ResourceUtilization getCurrentUtilization() {
+ return this.containersAllocation;
+ }
+
+ /**
+ * Add Container's resources to the accumulated Utilization.
+ * @param container Container.
+ */
+ public void addContainerResources(Container container) {
+ increaseResourceUtilization(
+ getContainersMonitor(), this.containersAllocation,
+ container.getResource());
+ }
+
+ /**
+ * Subtract Container's resources to the accumulated Utilization.
+ * @param container Container.
+ */
+ public void subtractContainerResource(Container container) {
+ decreaseResourceUtilization(
+ getContainersMonitor(), this.containersAllocation,
+ container.getResource());
+ }
+
+ /**
+ * Check if NM has resources available currently to run the container.
+ * @param container Container.
+ * @return True, if NM has resources available currently to run the
container.
+ */
+ public boolean hasResourcesAvailable(Container container) {
+ long pMemBytes = container.getResource().getMemorySize() * 1024 *
1024L;
+ return hasResourcesAvailable(pMemBytes,
+ (long) (getContainersMonitor().getVmemRatio()* pMemBytes),
+ container.getResource().getVirtualCores());
+ }
+
+ private boolean hasResourcesAvailable(long pMemBytes, long vMemBytes,
+ int cpuVcores) {
+ // Check physical memory.
+ if (LOG.isDebugEnabled()) {
+ LOG.debug("pMemCheck [current={} + asked={} > allowed={}]",
+ this.containersAllocation.getPhysicalMemory(),
+ (pMemBytes >> 20),
+ (getContainersMonitor().getPmemAllocatedForContainers() >> 20));
+ }
+ if (this.containersAllocation.getPhysicalMemory() +
+ (int) (pMemBytes >> 20) >
+ (int) (getContainersMonitor()
+ .getPmemAllocatedForContainers() >> 20)) {
+ return false;
+ }
+
+ if (LOG.isDebugEnabled()) {
+ LOG.debug("before vMemCheck" +
+ "[isEnabled={}, current={} + asked={} > allowed={}]",
+ getContainersMonitor().isVmemCheckEnabled(),
+ this.containersAllocation.getVirtualMemory(), (vMemBytes >> 20),
+ (getContainersMonitor().getVmemAllocatedForContainers() >> 20));
+ }
+ // Check virtual memory.
+ if (getContainersMonitor().isVmemCheckEnabled() &&
+ this.containersAllocation.getVirtualMemory() +
+ (int) (vMemBytes >> 20) >
+ (int) (getContainersMonitor()
+ .getVmemAllocatedForContainers() >> 20)) {
+ return false;
+ }
+
+ float vCores = (float) cpuVcores /
+ getContainersMonitor().getVCoresAllocatedForContainers();
+ if (LOG.isDebugEnabled()) {
+ LOG.debug("before cpuCheck [asked={} > allowed={}]",
+ this.containersAllocation.getCPU(), vCores);
+ }
+ // Check CPU.
+ if (this.containersAllocation.getCPU() + vCores > 1.0f) {
+ return false;
+ }
+ return true;
+ }
+
+ public ContainersMonitor getContainersMonitor() {
+ return this.scheduler.getContainersMonitor();
+ }
+
+ public static void increaseResourceUtilization(
+ ContainersMonitor containersMonitor, ResourceUtilization
resourceAlloc,
+ Resource resource) {
+ float vCores = (float) resource.getVirtualCores() /
+ containersMonitor.getVCoresAllocatedForContainers();
+ int vmem = (int) (resource.getMemorySize()
+ * containersMonitor.getVmemRatio());
+ resourceAlloc.addTo((int)resource.getMemorySize(), vmem, vCores);
+ }
+
+ public static void decreaseResourceUtilization(
--- End diff --
I sort of agree, but since it depends certain information from the
ContainersMonitor (which we have to pass in to the method), I thought we should
maybe keep it as static.
If you don't mind, lets keep it a it is for this patch.. and refactor when
we get a more concrete argument.
> Add SCHEDULE to NM container lifecycle
> --------------------------------------
>
> Key: YARN-4597
> URL: https://issues.apache.org/jira/browse/YARN-4597
> Project: Hadoop YARN
> Issue Type: New Feature
> Components: nodemanager
> Reporter: Chris Douglas
> Assignee: Arun Suresh
> Labels: oct16-hard
> Attachments: YARN-4597.001.patch, YARN-4597.002.patch,
> YARN-4597.003.patch, YARN-4597.004.patch, YARN-4597.005.patch,
> YARN-4597.006.patch, YARN-4597.007.patch, YARN-4597.008.patch,
> YARN-4597.009.patch
>
>
> Currently, the NM immediately launches containers after resource
> localization. Several features could be more cleanly implemented if the NM
> included a separate stage for reserving resources.
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