/*
* 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.giraph;
import static org.apache.giraph.examples.GeneratedVertexReader.READER_VERTICES;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import org.apache.giraph.conf.GiraphConfiguration;
import org.apache.giraph.conf.GiraphConstants;
import org.apache.giraph.examples.SimpleCheckpoint;
import org.apache.giraph.examples.SimpleSuperstepComputation.SimpleSuperstepVertexInputFormat;
import org.apache.giraph.examples.SimpleSuperstepComputation.SimpleSuperstepVertexOutputFormat;
import org.apache.giraph.job.GiraphJob;
import org.apache.giraph.partition.HashRangePartitionerFactory;
import org.apache.giraph.partition.PartitionBalancer;
import org.apache.giraph.partition.SimpleLongRangePartitionerFactory;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.junit.Test;
/**
* Unit test for manual checkpoint restarting
*/
public class TestGraphPartitioner extends BspCase {
public TestGraphPartitioner() {
super(TestGraphPartitioner.class.getName());
}
private void verifyOutput(FileSystem fs, Path outputPath)
throws IOException {
// TODO: this is fragile (breaks with legit serialization changes)
final int correctLen = 120;
if (runningInDistributedMode()) {
FileStatus[] fileStatusArr = fs.listStatus(outputPath);
int totalLen = 0;
for (FileStatus fileStatus : fileStatusArr) {
if (fileStatus.getPath().toString().contains("/part-m-")) {
totalLen += fileStatus.getLen();
}
}
assertEquals(correctLen, totalLen);
}
}
/**
* Run a sample BSP job locally and test various partitioners and
* partition algorithms.
*
* @throws IOException
* @throws ClassNotFoundException
* @throws InterruptedException
*/
@Test
public void testPartitioners()
throws IOException, InterruptedException, ClassNotFoundException {
Path outputPath = getTempPath("testVertexBalancer");
GiraphConfiguration conf = new GiraphConfiguration();
conf.setComputationClass(
SimpleCheckpoint.SimpleCheckpointComputation.class);
conf.setWorkerContextClass(
SimpleCheckpoint.SimpleCheckpointVertexWorkerContext.class);
conf.setMasterComputeClass(
SimpleCheckpoint.SimpleCheckpointVertexMasterCompute.class);
conf.setVertexInputFormatClass(SimpleSuperstepVertexInputFormat.class);
conf.setVertexOutputFormatClass(SimpleSuperstepVertexOutputFormat.class);
GiraphJob job = prepareJob("testVertexBalancer", conf, outputPath);
job.getConfiguration().set(
PartitionBalancer.PARTITION_BALANCE_ALGORITHM,
PartitionBalancer.VERTICES_BALANCE_ALGORITHM);
assertTrue(job.run(true));
FileSystem hdfs = FileSystem.get(job.getConfiguration());
conf = new GiraphConfiguration();
conf.setComputationClass(
SimpleCheckpoint.SimpleCheckpointComputation.class);
conf.setWorkerContextClass(
SimpleCheckpoint.SimpleCheckpointVertexWorkerContext.class);
conf.setMasterComputeClass(
SimpleCheckpoint.SimpleCheckpointVertexMasterCompute.class);
conf.setVertexInputFormatClass(SimpleSuperstepVertexInputFormat.class);
conf.setVertexOutputFormatClass(SimpleSuperstepVertexOutputFormat.class);
outputPath = getTempPath("testHashPartitioner");
job = prepareJob("testHashPartitioner", conf, outputPath);
assertTrue(job.run(true));
verifyOutput(hdfs, outputPath);
job = new GiraphJob("testHashRangePartitioner");
setupConfiguration(job);
job.getConfiguration().setComputationClass(
SimpleCheckpoint.SimpleCheckpointComputation.class);
job.getConfiguration().setWorkerContextClass(
SimpleCheckpoint.SimpleCheckpointVertexWorkerContext.class);
job.getConfiguration().setMasterComputeClass(
SimpleCheckpoint.SimpleCheckpointVertexMasterCompute.class);
job.getConfiguration().setVertexInputFormatClass(
SimpleSuperstepVertexInputFormat.class);
job.getConfiguration().setVertexOutputFormatClass(
SimpleSuperstepVertexOutputFormat.class);
job.getConfiguration().setGraphPartitionerFactoryClass(
HashRangePartitionerFactory.class);
outputPath = getTempPath("testHashRangePartitioner");
removeAndSetOutput(job, outputPath);
assertTrue(job.run(true));
verifyOutput(hdfs, outputPath);
job = new GiraphJob("testSimpleRangePartitioner");
setupConfiguration(job);
job.getConfiguration().setComputationClass(
SimpleCheckpoint.SimpleCheckpointComputation.class);
job.getConfiguration().setWorkerContextClass(
SimpleCheckpoint.SimpleCheckpointVertexWorkerContext.class);
job.getConfiguration().setMasterComputeClass(
SimpleCheckpoint.SimpleCheckpointVertexMasterCompute.class);
job.getConfiguration().setVertexInputFormatClass(
SimpleSuperstepVertexInputFormat.class);
job.getConfiguration().setVertexOutputFormatClass(
SimpleSuperstepVertexOutputFormat.class);
job.getConfiguration().setGraphPartitionerFactoryClass(
SimpleLongRangePartitionerFactory.class);
long readerVertices =
READER_VERTICES.getWithDefault(job.getConfiguration(), -1L);
job.getConfiguration().setLong(
GiraphConstants.PARTITION_VERTEX_KEY_SPACE_SIZE, readerVertices);
outputPath = getTempPath("testSimpleRangePartitioner");
removeAndSetOutput(job, outputPath);
assertTrue(job.run(true));
verifyOutput(hdfs, outputPath);
}
}