TestMiniMRDFSCaching.java
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上传日期:2018-01-08
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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.hadoop.mapred;
- import java.io.*;
- import junit.framework.TestCase;
- import org.apache.hadoop.hdfs.MiniDFSCluster;
- import org.apache.hadoop.fs.FileSystem;
- import org.apache.hadoop.mapred.MRCaching.TestResult;
- /**
- * A JUnit test to test caching with DFS
- *
- */
- public class TestMiniMRDFSCaching extends TestCase {
- public void testWithDFS() throws IOException {
- MiniMRCluster mr = null;
- MiniDFSCluster dfs = null;
- FileSystem fileSys = null;
- try {
- JobConf conf = new JobConf();
- conf.set("fs.hdfs.impl",
- "org.apache.hadoop.hdfs.ChecksumDistributedFileSystem");
- dfs = new MiniDFSCluster(conf, 1, true, null);
- fileSys = dfs.getFileSystem();
- mr = new MiniMRCluster(2, fileSys.getName(), 4);
- MRCaching.setupCache("/cachedir", fileSys);
- // run the wordcount example with caching
- TestResult ret = MRCaching.launchMRCache("/testing/wc/input",
- "/testing/wc/output",
- "/cachedir",
- mr.createJobConf(),
- "The quick brown foxnhas many sillyn"
- + "red fox soxn", false);
- assertTrue("Archives not matching", ret.isOutputOk);
- // launch MR cache with symlinks
- ret = MRCaching.launchMRCache("/testing/wc/input",
- "/testing/wc/output",
- "/cachedir",
- mr.createJobConf(),
- "The quick brown foxnhas many sillyn"
- + "red fox soxn", true);
- assertTrue("Archives not matching", ret.isOutputOk);
- } finally {
- if (fileSys != null) {
- fileSys.close();
- }
- if (dfs != null) {
- dfs.shutdown();
- }
- if (mr != null) {
- mr.shutdown();
- }
- }
- }
- public static void main(String[] argv) throws Exception {
- TestMiniMRDFSCaching td = new TestMiniMRDFSCaching();
- td.testWithDFS();
- }
- }