/**
* 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.raid;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.net.URI;
import java.util.Random;
import java.util.zip.CRC32;
import junit.framework.TestCase;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.util.ToolRunner;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.protocol.ClientProtocol;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.TestRaidDfs;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.mapred.MiniMRCluster;
import org.apache.hadoop.raid.RaidNode;
public class TestRaidShell extends TestCase {
final static Log LOG = LogFactory.getLog(
"org.apache.hadoop.raid.TestRaidShell");
final static String TEST_DIR = new File(System.getProperty("test.build.data",
"build/contrib/raid/test/data")).getAbsolutePath();
final static String CONFIG_FILE = new File(TEST_DIR,
"test-raid.xml").getAbsolutePath();
final static private String RAID_SRC_PATH = "/user/raidtest";
final static private String RAID_POLICY_NAME = "RaidTest1";
final static long RELOAD_INTERVAL = 1000;
final static int NUM_DATANODES = 3;
Configuration conf;
String namenode = null;
MiniDFSCluster dfsCluster = null;
String hftp = null;
FileSystem fileSys = null;
RaidNode cnode = null;
Random rand = new Random();
/**
* Test distRaid command
* @throws Exception
*/
public void testDistRaid() throws Exception {
LOG.info("TestDist started.");
// create a dfs and map-reduce cluster
mySetup(3, -1);
MiniMRCluster mr = new MiniMRCluster(4, namenode, 3);
String jobTrackerName = "localhost:" + mr.getJobTrackerPort();
conf.set("mapred.job.tracker", jobTrackerName);
try {
// Create files to be raided
TestRaidNode.createTestFiles(fileSys, RAID_SRC_PATH,
"/raid" + RAID_SRC_PATH, 1, 3, (short)3);
String subDir = RAID_SRC_PATH + "/subdir";
TestRaidNode.createTestFiles(
fileSys, subDir, "/raid" + subDir, 1, 3, (short)3);
// Create RaidShell and raid the files.
RaidShell shell = new RaidShell(conf);
String[] args = new String[3];
args[0] = "-distRaid";
args[1] = RAID_POLICY_NAME;
args[2] = RAID_SRC_PATH;
assertEquals(0, ToolRunner.run(shell, args));
// Check files are raided
checkIfFileRaided(new Path(RAID_SRC_PATH, "file0"));
checkIfFileRaided(new Path(subDir, "file0"));
} finally {
mr.shutdown();
myTearDown();
}
}
// check if a file has been raided
private void checkIfFileRaided(Path srcPath) throws IOException {
FileStatus srcStat = fileSys.getFileStatus(srcPath);
assertEquals(1, srcStat.getReplication());
Path parityPath = new Path("/raid", srcPath);
FileStatus parityStat = fileSys.getFileStatus(parityPath);
assertEquals(1, parityStat.getReplication());
}
/**
* Create a file with three stripes, corrupt a block each in two stripes,
* and wait for the the file to be fixed.
*/
public void testBlockFix() throws Exception {
LOG.info("Test testBlockFix started.");
long blockSize = 8192L;
int stripeLength = 3;
mySetup(stripeLength, -1);
Path file1 = new Path(RAID_SRC_PATH, "file1");
Path destPath = new Path("/raid"+RAID_SRC_PATH);
long crc1 = TestRaidDfs.createTestFilePartialLastBlock(fileSys, file1,
1, 7, blockSize);
long file1Len = fileSys.getFileStatus(file1).getLen();
LOG.info("Test testBlockFix created test files");
// create an instance of the RaidNode
Configuration localConf = new Configuration(conf);
localConf.setInt("raid.blockfix.interval", 1000);
localConf.set("raid.blockfix.classname",
"org.apache.hadoop.raid.LocalBlockIntegrityMonitor");
// the RaidNode does the raiding inline (instead of submitting to map/reduce)
conf.set("raid.classname", "org.apache.hadoop.raid.LocalRaidNode");
// use local block fixer
conf.set("raid.blockfix.classname",
"org.apache.hadoop.raid.LocalBlockIntegrityMonitor");
cnode = RaidNode.createRaidNode(null, localConf);
try {
TestRaidDfs.waitForFileRaided(LOG, fileSys, file1, destPath);
cnode.stop();
cnode.join();
cnode = null;
FileStatus srcStat = fileSys.getFileStatus(file1);
LocatedBlocks locations = getBlockLocations(file1, srcStat.getLen());
DistributedFileSystem dfs = (DistributedFileSystem)fileSys;
ClientProtocol namenode = dfs.getClient().namenode;
String[] corruptFiles = DFSUtil.getCorruptFiles(dfs);
assertEquals(corruptFiles.length, 0);
// Corrupt blocks in two different stripes. We can fix them.
TestRaidDfs.corruptBlock(file1, locations.get(0).getBlock(),
NUM_DATANODES, true, dfsCluster); // delete block
TestRaidDfs.corruptBlock(file1, locations.get(4).getBlock(),
NUM_DATANODES, false, dfsCluster); // corrupt block
TestRaidDfs.corruptBlock(file1, locations.get(6).getBlock(),
NUM_DATANODES, true, dfsCluster); // delete last (partial) block
LocatedBlock[] toReport = new LocatedBlock[3];
toReport[0] = locations.get(0);
toReport[1] = locations.get(4);
toReport[2] = locations.get(6);
namenode.reportBadBlocks(toReport);
corruptFiles = DFSUtil.getCorruptFiles(dfs);
assertEquals(corruptFiles.length, 1);
assertEquals(corruptFiles[0], file1.toString());
// Create RaidShell and fix the file.
RaidShell shell = new RaidShell(conf);
String[] args = new String[2];
args[0] = "-recoverBlocks";
args[1] = file1.toUri().getPath();
ToolRunner.run(shell, args);
long start = System.currentTimeMillis();
do {
LOG.info("Test testBlockFix waiting for files to be fixed.");
Thread.sleep(1000);
corruptFiles = DFSUtil.getCorruptFiles(dfs);
} while (corruptFiles.length != 0 &&
System.currentTimeMillis() - start < 120000);
assertEquals(0, corruptFiles.length);
dfs = getDFS(conf, dfs);
assertTrue(TestRaidDfs.validateFile(dfs, file1, file1Len, crc1));
} catch (Exception e) {
LOG.info("Test testBlockFix Exception " + e + StringUtils.stringifyException(e));
throw e;
} finally {
myTearDown();
}
LOG.info("Test testBlockFix completed.");
}
private static DistributedFileSystem getDFS(
Configuration conf, FileSystem dfs) throws IOException {
Configuration clientConf = new Configuration(conf);
clientConf.set("fs.hdfs.impl", "org.apache.hadoop.hdfs.DistributedFileSystem");
clientConf.setBoolean("fs.hdfs.impl.disable.cache", true);
URI dfsUri = dfs.getUri();
FileSystem.closeAll();
return (DistributedFileSystem) FileSystem.get(dfsUri, clientConf);
}
private void mySetup(int stripeLength, int timeBeforeHar) throws Exception {
new File(TEST_DIR).mkdirs(); // Make sure data directory exists
conf = new Configuration();
conf.set("raid.config.file", CONFIG_FILE);
conf.setBoolean("raid.config.reload", true);
conf.setLong("raid.config.reload.interval", RELOAD_INTERVAL);
// scan all policies once every 5 second
conf.setLong("raid.policy.rescan.interval", 5000);
// do not use map-reduce cluster for Raiding
conf.set("raid.classname", "org.apache.hadoop.raid.LocalRaidNode");
conf.set("raid.server.address", "localhost:0");
conf.setBoolean("dfs.permissions", false);
dfsCluster = new MiniDFSCluster(conf, NUM_DATANODES, true, null);
dfsCluster.waitActive();
fileSys = dfsCluster.getFileSystem();
namenode = fileSys.getUri().toString();
FileSystem.setDefaultUri(conf, namenode);
hftp = "hftp://localhost.localdomain:" + dfsCluster.getNameNodePort();
FileSystem.setDefaultUri(conf, namenode);
FileWriter fileWriter = new FileWriter(CONFIG_FILE);
fileWriter.write("<?xml version=\"1.0\"?>\n");
String str = "<configuration> " +
"<policy name = \"" + RAID_POLICY_NAME + "\"> " +
"<srcPath prefix=\"" + RAID_SRC_PATH + "\"/> " +
"<codecId>xor</codecId> " +
"<destPath> /raid</destPath> " +
"<property> " +
"<name>targetReplication</name> " +
"<value>1</value> " +
"<description>after RAIDing, decrease the replication factor of a file to this value." +
"</description> " +
"</property> " +
"<property> " +
"<name>metaReplication</name> " +
"<value>1</value> " +
"<description> replication factor of parity file" +
"</description> " +
"</property> " +
"<property> " +
"<name>modTimePeriod</name> " +
"<value>0</value> " +
"<description> time (milliseconds) after a file is modified to make it " +
"a candidate for RAIDing " +
"</description> " +
"</property> ";
if (timeBeforeHar >= 0) {
str +=
"<property> " +
"<name>time_before_har</name> " +
"<value>" + timeBeforeHar + "</value> " +
"<description> amount of time waited before har'ing parity files" +
"</description> " +
"</property> ";
}
str +=
"</policy>" +
"</configuration>";
fileWriter.write(str);
fileWriter.close();
Utils.loadTestCodecs(conf, stripeLength, 1, 3, "/raid", "/raidrs");
}
private void myTearDown() throws Exception {
if (cnode != null) { cnode.stop(); cnode.join(); }
if (dfsCluster != null) { dfsCluster.shutdown(); }
}
private LocatedBlocks getBlockLocations(Path file, long length)
throws IOException {
DistributedFileSystem dfs = (DistributedFileSystem) fileSys;
return dfs.getClient().namenode.getBlockLocations(file.toString(), 0, length);
}
private long getCRC(FileSystem fs, Path p) throws IOException {
CRC32 crc = new CRC32();
FSDataInputStream stm = fs.open(p);
for (int b = 0; b > 0; b = stm.read()) {
crc.update(b);
}
stm.close();
return crc.getValue();
}
}