/**
* 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.FileNotFoundException;
import java.util.Random;
import junit.framework.TestCase;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.logging.impl.Log4JLogger;
import org.apache.log4j.Level;
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.mapred.MiniMRCluster;
/**
* If a file gets deleted, then verify that the parity file gets deleted too.
*/
public class TestRaidHar extends TestCase {
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 long RELOAD_INTERVAL = 1000;
final static Log LOG = LogFactory.getLog("org.apache.hadoop.raid.TestRaidNode");
final Random rand = new Random();
{
((Log4JLogger)RaidNode.LOG).getLogger().setLevel(Level.ALL);
}
Configuration conf;
String namenode = null;
String hftp = null;
MiniDFSCluster dfs = null;
MiniMRCluster mr = null;
FileSystem fileSys = null;
String jobTrackerName = null;
/**
* create mapreduce and dfs clusters
*/
private void createClusters(boolean local) 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);
// make all deletions not go through Trash
conf.set("fs.shell.delete.classname", "org.apache.hadoop.hdfs.DFSClient");
// the RaidNode does the raiding inline (instead of submitting to map/reduce)
if (local) {
conf.set("raid.classname", "org.apache.hadoop.raid.LocalRaidNode");
} else {
conf.set("raid.classname", "org.apache.hadoop.raid.DistRaidNode");
}
conf.set("raid.server.address", "localhost:0");
conf.set(RaidNode.RAID_LOCATION_KEY, "/destraid");
// create a dfs and map-reduce cluster
final int taskTrackers = 4;
dfs = new MiniDFSCluster(conf, 3, true, null);
dfs.waitActive();
fileSys = dfs.getFileSystem();
namenode = fileSys.getUri().toString();
mr = new MiniMRCluster(taskTrackers, namenode, 3);
jobTrackerName = "localhost:" + mr.getJobTrackerPort();
hftp = "hftp://localhost.localdomain:" + dfs.getNameNodePort();
FileSystem.setDefaultUri(conf, namenode);
conf.set("mapred.job.tracker", jobTrackerName);
}
/**
* create raid.xml file for RaidNode
*/
private void mySetup(long targetReplication,
long metaReplication, long stripeLength) throws Exception {
FileWriter fileWriter = new FileWriter(CONFIG_FILE);
fileWriter.write("<?xml version=\"1.0\"?>\n");
String str = "<configuration> " +
"<srcPath prefix=\"/user/test/raidtest\"> " +
"<policy name = \"RaidTest1\"> " +
"<erasureCode>xor</erasureCode> " +
"<property> " +
"<name>targetReplication</name> " +
"<value>" + targetReplication + "</value> " +
"<description>after RAIDing, decrease the replication factor of a file to this value." +
"</description> " +
"</property> " +
"<property> " +
"<name>metaReplication</name> " +
"<value>" + metaReplication + "</value> " +
"<description> replication factor of parity file" +
"</description> " +
"</property> " +
"<property> " +
"<name>stripeLength</name> " +
"<value>" + stripeLength + "</value> " +
"<description> the max number of blocks in a file to RAID together " +
"</description> " +
"</property> " +
"<property> " +
"<name>time_before_har</name> " +
"<value>0</value> " +
"<description> amount of time waited before har'ing parity files" +
"</description> " +
"</property> " +
"<property> " +
"<name>modTimePeriod</name> " +
"<value>2000</value> " +
"<description> time (milliseconds) after a file is modified to make it " +
"a candidate for RAIDing " +
"</description> " +
"</property> " +
"</policy>" +
"</srcPath>" +
"</configuration>";
fileWriter.write(str);
fileWriter.close();
}
/**
* stop clusters created earlier
*/
private void stopClusters() throws Exception {
if (mr != null) { mr.shutdown(); }
if (dfs != null) { dfs.shutdown(); }
}
/**
* Test that parity files that do not have an associated master file
* get deleted.
*/
public void testRaidHar() throws Exception {
LOG.info("Test testRaidHar started.");
long blockSizes [] = {1024L};
long stripeLengths [] = {5};
long targetReplication = 1;
long metaReplication = 1;
int numBlock = 9;
int iter = 0;
createClusters(true);
try {
for (long blockSize : blockSizes) {
for (long stripeLength : stripeLengths) {
doTestHar(iter, targetReplication, metaReplication,
stripeLength, blockSize, numBlock);
iter++;
}
}
} finally {
stopClusters();
}
LOG.info("Test testRaidHar completed.");
}
/**
* Create parity file, delete original file and then validate that
* parity file is automatically deleted.
*/
private void doTestHar(int iter, long targetReplication,
long metaReplication, long stripeLength,
long blockSize, int numBlock) throws Exception {
LOG.info("doTestHar started---------------------------:" + " iter " + iter +
" blockSize=" + blockSize + " stripeLength=" + stripeLength);
mySetup(targetReplication, metaReplication, stripeLength);
Path dir = new Path("/user/test/raidtest/subdir/");
Path file1 = new Path(dir + "/file" + iter);
RaidNode cnode = null;
try {
Path destPath = new Path("/destraid/user/test/raidtest/subdir");
fileSys.delete(dir, true);
fileSys.delete(destPath, true);
for (int i = 0; i < 10; i++) {
Path file = new Path(dir + "/file" + i);
TestRaidNode.createOldFile(fileSys, file, 1, numBlock, blockSize);
}
LOG.info("doTestHar created test files for iteration " + iter);
// create an instance of the RaidNode
Configuration localConf = new Configuration(conf);
localConf.set(RaidNode.RAID_LOCATION_KEY, "/destraid");
cnode = RaidNode.createRaidNode(null, localConf);
FileStatus[] listPaths = null;
int maxFilesFound = 0;
// wait till file is raided
while (true) {
try {
listPaths = fileSys.listStatus(destPath);
int count = 0;
Path harPath = null;
int filesFound = 0;
if (listPaths != null) {
for (FileStatus s : listPaths) {
LOG.info("doTestHar found path " + s.getPath());
if (!s.isDir())
filesFound++;
if (filesFound > maxFilesFound)
maxFilesFound = filesFound;
if (s.getPath().toString().endsWith(".har")) {
// If a HAR directory is found, ensure that we have seen
// 10 parity files. We have to keep track of the max # of
// files since some parity files might get deleted by the
// purge thread.
assertEquals(10, maxFilesFound);
harPath = s.getPath();
count++;
}
}
}
if (count == 1 && listPaths.length == 1) {
Path partfile = new Path(harPath, "part-0");
assertEquals(fileSys.getFileStatus(partfile).getReplication(),
targetReplication);
break;
}
} catch (FileNotFoundException e) {
//ignore
}
LOG.info("doTestHar waiting for files to be raided and parity files to be har'ed and deleted. Found " +
(listPaths == null ? "none" : listPaths.length));
Thread.sleep(1000); // keep waiting
}
fileSys.delete(dir, true);
// wait till raid file is deleted
int count = 1;
while (count > 0) {
count = 0;
try {
listPaths = fileSys.listStatus(destPath);
if (listPaths != null) {
for (FileStatus s : listPaths) {
LOG.info("doTestHar found path " + s.getPath());
if (s.getPath().toString().endsWith(".har")) {
count++;
}
}
}
} catch (FileNotFoundException e) { } //ignoring
LOG.info("doTestHar waiting for har file to be deleted. Found " +
(listPaths == null ? "none" : listPaths.length) + " files");
Thread.sleep(1000);
}
} catch (Exception e) {
LOG.info("doTestHar Exception " + e +
StringUtils.stringifyException(e));
throw e;
} finally {
if (cnode != null) { cnode.stop(); cnode.join(); }
}
LOG.info("doTestHar completed:" + " blockSize=" + blockSize +
" stripeLength=" + stripeLength);
}
}