/**
* 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.hdfs.server.blockmanagement;
import junit.framework.TestCase;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.protocol.Block;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockManager;
import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor;
import org.apache.hadoop.hdfs.server.common.GenerationStamp;
import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
/**
* Test if FSNamesystem handles heartbeat right
*/
public class TestComputeInvalidateWork extends TestCase {
/**
* Test if {@link FSNamesystem#computeInvalidateWork(int)}
* can schedule invalidate work correctly
*/
public void testCompInvalidate() throws Exception {
final Configuration conf = new HdfsConfiguration();
final int NUM_OF_DATANODES = 3;
final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(NUM_OF_DATANODES).build();
try {
cluster.waitActive();
final FSNamesystem namesystem = cluster.getNamesystem();
final BlockManager bm = namesystem.getBlockManager();
final int blockInvalidateLimit = bm.getDatanodeManager().blockInvalidateLimit;
final DatanodeDescriptor[] nodes = bm.getDatanodeManager(
).getHeartbeatManager().getDatanodes();
assertEquals(nodes.length, NUM_OF_DATANODES);
namesystem.writeLock();
try {
for (int i=0; i<nodes.length; i++) {
for(int j=0; j<3*blockInvalidateLimit+1; j++) {
Block block = new Block(i*(blockInvalidateLimit+1)+j, 0,
GenerationStamp.FIRST_VALID_STAMP);
bm.addToInvalidates(block, nodes[i]);
}
}
assertEquals(blockInvalidateLimit*NUM_OF_DATANODES,
bm.computeInvalidateWork(NUM_OF_DATANODES+1));
assertEquals(blockInvalidateLimit*NUM_OF_DATANODES,
bm.computeInvalidateWork(NUM_OF_DATANODES));
assertEquals(blockInvalidateLimit*(NUM_OF_DATANODES-1),
bm.computeInvalidateWork(NUM_OF_DATANODES-1));
int workCount = bm.computeInvalidateWork(1);
if (workCount == 1) {
assertEquals(blockInvalidateLimit+1, bm.computeInvalidateWork(2));
} else {
assertEquals(workCount, blockInvalidateLimit);
assertEquals(2, bm.computeInvalidateWork(2));
}
} finally {
namesystem.writeUnlock();
}
} finally {
cluster.shutdown();
}
}
}