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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.drill.exec.work.foreman.rm;
import org.apache.drill.common.config.DrillConfig;
import org.apache.drill.exec.ops.QueryContext;
import org.apache.drill.exec.physical.PhysicalPlan;
import org.apache.drill.exec.util.MemoryAllocationUtilities;
import org.apache.drill.exec.work.QueryWorkUnit;
import org.apache.drill.exec.work.foreman.Foreman;
/**
* Represents a default resource manager for clusters that do not provide query
* queues. Without queues to provide a hard limit on the query admission rate,
* the number of active queries must be estimated and the resulting resource
* allocations will be rough estimates.
*/
public class DefaultResourceManager implements ResourceManager {
public static class DefaultResourceAllocator implements QueryResourceAllocator {
private QueryContext queryContext;
protected DefaultResourceAllocator(QueryContext queryContext) {
this.queryContext = queryContext;
}
@Override
public void visitAbstractPlan(PhysicalPlan plan) {
if (plan == null || plan.getProperties().hasResourcePlan) {
return;
}
MemoryAllocationUtilities.setupBufferedOpsMemoryAllocations(plan, queryContext);
}
@Override
public void visitPhysicalPlan(QueryWorkUnit work) {
}
}
public static class DefaultQueryResourceManager extends DefaultResourceAllocator implements QueryResourceManager {
@SuppressWarnings("unused")
private final DefaultResourceManager rm;
public DefaultQueryResourceManager(final DefaultResourceManager rm, final Foreman foreman) {
super(foreman.getQueryContext());
this.rm = rm;
}
@Override
public void setCost(double cost) {
// Nothing to do by default.
}
@Override
public void admit() {
// No queueing by default
}
@Override
public void exit() {
// No queueing by default
}
@Override
public boolean hasQueue() { return false; }
@Override
public String queueName() { return null; }
}
public final long memoryPerNode;
public final int cpusPerNode;
public DefaultResourceManager() {
memoryPerNode = DrillConfig.getMaxDirectMemory();
// Note: CPUs are not yet used, they will be used in a future
// enhancement.
cpusPerNode = Runtime.getRuntime().availableProcessors();
}
@Override
public long memoryPerNode() { return memoryPerNode; }
@Override
public int cpusPerNode() { return cpusPerNode; }
@Override
public QueryResourceAllocator newResourceAllocator(QueryContext queryContext) {
return new DefaultResourceAllocator(queryContext);
}
@Override
public QueryResourceManager newQueryRM(final Foreman foreman) {
return new DefaultQueryResourceManager(this, foreman);
}
@Override
public void close() { }
}
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