| /** |
| * 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.api.records; |
| |
| import java.util.Arrays; |
| |
| import org.apache.commons.lang.NotImplementedException; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceAudience.Public; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.classification.InterfaceStability.Evolving; |
| import org.apache.hadoop.classification.InterfaceStability.Stable; |
| import org.apache.hadoop.yarn.api.ApplicationMasterProtocol; |
| import org.apache.hadoop.yarn.api.records.impl.BaseResource; |
| import org.apache.hadoop.yarn.exceptions.ResourceNotFoundException; |
| import org.apache.hadoop.yarn.util.Records; |
| import org.apache.hadoop.yarn.util.resource.ResourceUtils; |
| |
| /** |
| * <p><code>Resource</code> models a set of computer resources in the |
| * cluster.</p> |
| * |
| * <p>Currently it models both <em>memory</em> and <em>CPU</em>.</p> |
| * |
| * <p>The unit for memory is megabytes. CPU is modeled with virtual cores |
| * (vcores), a unit for expressing parallelism. A node's capacity should |
| * be configured with virtual cores equal to its number of physical cores. A |
| * container should be requested with the number of cores it can saturate, i.e. |
| * the average number of threads it expects to have runnable at a time.</p> |
| * |
| * <p>Virtual cores take integer values and thus currently CPU-scheduling is |
| * very coarse. A complementary axis for CPU requests that represents |
| * processing power will likely be added in the future to enable finer-grained |
| * resource configuration.</p> |
| * |
| * <p>Typically, applications request <code>Resource</code> of suitable |
| * capability to run their component tasks.</p> |
| * |
| * @see ResourceRequest |
| * @see ApplicationMasterProtocol#allocate(org.apache.hadoop.yarn.api.protocolrecords.AllocateRequest) |
| */ |
| @Public |
| @Stable |
| public abstract class Resource implements Comparable<Resource> { |
| |
| protected static final String MEMORY = ResourceInformation.MEMORY_MB.getName(); |
| protected static final String VCORES = ResourceInformation.VCORES.getName(); |
| |
| @Public |
| @Stable |
| public static Resource newInstance(int memory, int vCores) { |
| if (ResourceUtils.getResourceTypesArray().length > 2) { |
| Resource ret = Records.newRecord(Resource.class); |
| ret.setMemorySize(memory); |
| ret.setVirtualCores(vCores); |
| return ret; |
| } |
| return new BaseResource(memory, vCores); |
| } |
| |
| @Public |
| @Stable |
| public static Resource newInstance(long memory, int vCores) { |
| if (ResourceUtils.getResourceTypesArray().length > 2) { |
| Resource ret = Records.newRecord(Resource.class); |
| ret.setMemorySize(memory); |
| ret.setVirtualCores(vCores); |
| return ret; |
| } |
| return new BaseResource(memory, vCores); |
| } |
| |
| @InterfaceAudience.Private |
| @InterfaceStability.Unstable |
| public static Resource newInstance(Resource resource) { |
| Resource ret = Resource.newInstance(resource.getMemorySize(), |
| resource.getVirtualCores()); |
| if (ResourceUtils.getResourceTypesArray().length > 2) { |
| Resource.copy(resource, ret); |
| } |
| return ret; |
| } |
| |
| @InterfaceAudience.Private |
| @InterfaceStability.Unstable |
| public static void copy(Resource source, Resource dest) { |
| for (ResourceInformation entry : source.getResources()) { |
| dest.setResourceInformation(entry.getName(), entry); |
| } |
| } |
| |
| /** |
| * This method is DEPRECATED: |
| * Use {@link Resource#getMemorySize()} instead |
| * |
| * Get <em>memory</em> of the resource. Note - while memory has |
| * never had a unit specified, all YARN configurations have specified memory |
| * in MB. The assumption has been that the daemons and applications are always |
| * using the same units. With the introduction of the ResourceInformation |
| * class we have support for units - so this function will continue to return |
| * memory but in the units of MB |
| * |
| * @return <em>memory</em>(in MB) of the resource |
| */ |
| @Public |
| @Deprecated |
| public abstract int getMemory(); |
| |
| /** |
| * Get <em>memory</em> of the resource. Note - while memory has |
| * never had a unit specified, all YARN configurations have specified memory |
| * in MB. The assumption has been that the daemons and applications are always |
| * using the same units. With the introduction of the ResourceInformation |
| * class we have support for units - so this function will continue to return |
| * memory but in the units of MB |
| * |
| * @return <em>memory</em> of the resource |
| */ |
| @Public |
| @Stable |
| public long getMemorySize() { |
| throw new NotImplementedException( |
| "This method is implemented by ResourcePBImpl"); |
| } |
| |
| /** |
| * Set <em>memory</em> of the resource. Note - while memory has |
| * never had a unit specified, all YARN configurations have specified memory |
| * in MB. The assumption has been that the daemons and applications are always |
| * using the same units. With the introduction of the ResourceInformation |
| * class we have support for units - so this function will continue to set |
| * memory but the assumption is that the value passed is in units of MB. |
| * |
| * @param memory <em>memory</em>(in MB) of the resource |
| */ |
| @Public |
| @Deprecated |
| public abstract void setMemory(int memory); |
| |
| /** |
| * Set <em>memory</em> of the resource. |
| * @param memory <em>memory</em> of the resource |
| */ |
| @Public |
| @Stable |
| public void setMemorySize(long memory) { |
| throw new NotImplementedException( |
| "This method is implemented by ResourcePBImpl"); |
| } |
| |
| |
| /** |
| * Get <em>number of virtual cpu cores</em> of the resource. |
| * |
| * Virtual cores are a unit for expressing CPU parallelism. A node's capacity |
| * should be configured with virtual cores equal to its number of physical |
| * cores. A container should be requested with the number of cores it can |
| * saturate, i.e. the average number of threads it expects to have runnable |
| * at a time. |
| * |
| * @return <em>num of virtual cpu cores</em> of the resource |
| */ |
| @Public |
| @Evolving |
| public abstract int getVirtualCores(); |
| |
| /** |
| * Set <em>number of virtual cpu cores</em> of the resource. |
| * |
| * Virtual cores are a unit for expressing CPU parallelism. A node's capacity |
| * should be configured with virtual cores equal to its number of physical |
| * cores. A container should be requested with the number of cores it can |
| * saturate, i.e. the average number of threads it expects to have runnable |
| * at a time. |
| * |
| * @param vCores <em>number of virtual cpu cores</em> of the resource |
| */ |
| @Public |
| @Evolving |
| public abstract void setVirtualCores(int vCores); |
| |
| /** |
| * Get ResourceInformation for all resources. |
| * |
| * @return Map of resource name to ResourceInformation |
| */ |
| @Public |
| @Evolving |
| public abstract ResourceInformation[] getResources(); |
| |
| /** |
| * Get ResourceInformation for a specified resource. |
| * |
| * @param resource name of the resource |
| * @return the ResourceInformation object for the resource |
| * @throws ResourceNotFoundException if the resource can't be found |
| */ |
| @Public |
| @Evolving |
| public ResourceInformation getResourceInformation(String resource) |
| throws ResourceNotFoundException { |
| Integer index = ResourceUtils.getResourceTypeIndex().get(resource); |
| ResourceInformation[] resources = getResources(); |
| if (index != null) { |
| return resources[index]; |
| } |
| throw new ResourceNotFoundException("Unknown resource '" + resource |
| + "'. Known resources are " + Arrays.toString(resources)); |
| } |
| |
| /** |
| * Get the value for a specified resource. No information about the units is |
| * returned. |
| * |
| * @param resource name of the resource |
| * @return the value for the resource |
| * @throws ResourceNotFoundException if the resource can't be found |
| */ |
| @Public |
| @Evolving |
| public long getResourceValue(String resource) |
| throws ResourceNotFoundException { |
| return getResourceInformation(resource).getValue(); |
| } |
| |
| /** |
| * Set the ResourceInformation object for a particular resource. |
| * |
| * @param resource the resource for which the ResourceInformation is provided |
| * @param resourceInformation ResourceInformation object |
| * @throws ResourceNotFoundException if the resource is not found |
| */ |
| @Public |
| @Evolving |
| public void setResourceInformation(String resource, |
| ResourceInformation resourceInformation) |
| throws ResourceNotFoundException { |
| if (resource.equals(MEMORY)) { |
| this.setMemorySize(resourceInformation.getValue()); |
| return; |
| } |
| if (resource.equals(VCORES)) { |
| this.setVirtualCores((int) resourceInformation.getValue()); |
| return; |
| } |
| ResourceInformation storedResourceInfo = getResourceInformation(resource); |
| ResourceInformation.copy(resourceInformation, storedResourceInfo); |
| } |
| |
| /** |
| * Set the value of a resource in the ResourceInformation object. The unit of |
| * the value is assumed to be the one in the ResourceInformation object. |
| * |
| * @param resource the resource for which the value is provided. |
| * @param value the value to set |
| * @throws ResourceNotFoundException if the resource is not found |
| */ |
| @Public |
| @Evolving |
| public void setResourceValue(String resource, long value) |
| throws ResourceNotFoundException { |
| if (resource.equals(MEMORY)) { |
| this.setMemorySize(value); |
| return; |
| } |
| if (resource.equals(VCORES)) { |
| this.setVirtualCores((int)value); |
| return; |
| } |
| |
| ResourceInformation storedResourceInfo = getResourceInformation(resource); |
| storedResourceInfo.setValue(value); |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 263167; |
| |
| int result = (int) (939769357 |
| + getMemorySize()); // prime * result = 939769357 initially |
| result = prime * result + getVirtualCores(); |
| for (ResourceInformation entry : getResources()) { |
| if (!entry.getName().equals(MEMORY) && !entry.getName().equals(VCORES)) { |
| result = prime * result + entry.hashCode(); |
| } |
| } |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null) { |
| return false; |
| } |
| if (!(obj instanceof Resource)) { |
| return false; |
| } |
| Resource other = (Resource) obj; |
| if (getMemorySize() != other.getMemorySize() |
| || getVirtualCores() != other.getVirtualCores()) { |
| return false; |
| } |
| |
| ResourceInformation[] myVectors = getResources(); |
| ResourceInformation[] otherVectors = other.getResources(); |
| |
| if (myVectors.length != otherVectors.length) { |
| return false; |
| } |
| |
| for (int i = 0; i < myVectors.length; i++) { |
| ResourceInformation a = myVectors[i]; |
| ResourceInformation b = otherVectors[i]; |
| if ((a != b) && ((a == null) || !a.equals(b))) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("<memory:").append(getMemorySize()).append(", vCores:") |
| .append(getVirtualCores()); |
| for (ResourceInformation entry : getResources()) { |
| if (entry.getName().equals(MEMORY) |
| && entry.getUnits() |
| .equals(ResourceInformation.MEMORY_MB.getUnits())) { |
| continue; |
| } |
| if (entry.getName().equals(VCORES) |
| && entry.getUnits() |
| .equals(ResourceInformation.VCORES.getUnits())) { |
| continue; |
| } |
| sb.append(", ").append(entry.getName()).append(": ") |
| .append(entry.getValue()) |
| .append(entry.getUnits()); |
| } |
| sb.append(">"); |
| return sb.toString(); |
| } |
| |
| @Override |
| public int compareTo(Resource other) { |
| ResourceInformation[] thisResources = this.getResources(); |
| ResourceInformation[] otherResources = other.getResources(); |
| |
| // compare memory and vcores first(in that order) to preserve |
| // existing behaviour |
| long diff = this.getMemorySize() - other.getMemorySize(); |
| if (diff == 0) { |
| diff = this.getVirtualCores() - other.getVirtualCores(); |
| } |
| if (diff == 0) { |
| diff = thisResources.length - otherResources.length; |
| if (diff == 0) { |
| int maxLength = ResourceUtils.getResourceTypesArray().length; |
| for (int i = 0; i < maxLength; i++) { |
| // For memory and vcores, we can skip the loop as it's already |
| // compared. |
| if (i < 2) { |
| continue; |
| } |
| |
| ResourceInformation entry = thisResources[i]; |
| ResourceInformation otherEntry = otherResources[i]; |
| if (entry.getName().equals(otherEntry.getName())) { |
| diff = entry.compareTo(otherEntry); |
| if (diff != 0) { |
| break; |
| } |
| } |
| } |
| } |
| } |
| return Long.compare(diff, 0); |
| } |
| } |