/**
* 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.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collection;
import java.util.GregorianCalendar;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;
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.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.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.mapred.MiniMRCluster;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.raid.protocol.PolicyInfo;
import org.apache.hadoop.raid.protocol.PolicyList;
import org.apache.hadoop.hdfs.TestRaidDfs;
import org.apache.hadoop.mapred.Reporter;
import org.apache.hadoop.raid.protocol.PolicyInfo;
/**
* If a file gets deleted, then verify that the parity file gets deleted too.
*/
public class TestRaidPurge 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.dfs.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");
// create a dfs and map-reduce cluster
final int taskTrackers = 4;
final int jobTrackerPort = 60050;
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 {
int harDelay = 1; // 1 day.
mySetup(targetReplication, metaReplication, stripeLength, harDelay);
}
private void mySetup(long targetReplication,
long metaReplication, long stripeLength, int harDelay) throws Exception {
FileWriter fileWriter = new FileWriter(CONFIG_FILE);
fileWriter.write("<?xml version=\"1.0\"?>\n");
String str = "<configuration> " +
"<srcPath prefix=\"/user/dhruba/raidtest\"> " +
"<policy name = \"RaidTest1\"> " +
"<erasureCode>xor</erasureCode> " +
"<destPath> /destraid</destPath> " +
"<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>modTimePeriod</name> " +
"<value>2000</value> " +
"<description> time (milliseconds) after a file is modified to make it " +
"a candidate for RAIDing " +
"</description> " +
"</property> " +
"<property> " +
"<name>time_before_har</name> " +
"<value> " + harDelay + "</value> " +
"<description> amount of time waited before har'ing parity files" +
"</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 testPurge() throws Exception {
LOG.info("Test testPurge 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) {
doTestPurge(iter, targetReplication, metaReplication,
stripeLength, blockSize, numBlock);
iter++;
}
}
} finally {
stopClusters();
}
LOG.info("Test testPurge completed.");
}
/**
* Create parity file, delete original file and then validate that
* parity file is automatically deleted.
*/
private void doTestPurge(int iter, long targetReplication,
long metaReplication, long stripeLength,
long blockSize, int numBlock) throws Exception {
LOG.info("doTestPurge started---------------------------:" + " iter " + iter +
" blockSize=" + blockSize + " stripeLength=" + stripeLength);
mySetup(targetReplication, metaReplication, stripeLength);
Path dir = new Path("/user/dhruba/raidtest/");
Path file1 = new Path(dir + "/file" + iter);
RaidNode cnode = null;
try {
Path destPath = new Path("/destraid/user/dhruba/raidtest");
fileSys.delete(dir, true);
fileSys.delete(destPath, true);
TestRaidNode.createOldFile(fileSys, file1, 1, numBlock, blockSize);
LOG.info("doTestPurge 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;
// wait till file is raided
while (true) {
try {
listPaths = fileSys.listStatus(destPath);
int count = 0;
if (listPaths != null && listPaths.length == 1) {
for (FileStatus s : listPaths) {
LOG.info("doTestPurge found path " + s.getPath());
if (!s.getPath().toString().endsWith(".tmp")) {
count++;
}
}
}
if (count > 0) {
break;
}
} catch (FileNotFoundException e) {
//ignore
}
LOG.info("doTestPurge waiting for files to be raided. Found " +
(listPaths == null ? "none" : listPaths.length));
Thread.sleep(1000); // keep waiting
}
// assertEquals(listPaths.length, 1); // all files raided
LOG.info("doTestPurge all files found in Raid.");
// delete original file
assertTrue("Unable to delete original file " + file1 ,
fileSys.delete(file1, true));
LOG.info("deleted file " + file1);
// wait till parity file and directory are automatically deleted
while (fileSys.exists(destPath)) {
LOG.info("doTestPurge waiting for parity files to be removed.");
Thread.sleep(1000); // keep waiting
}
} catch (Exception e) {
LOG.info("doTestPurge Exception " + e +
StringUtils.stringifyException(e));
throw e;
} finally {
if (cnode != null) { cnode.stop(); cnode.join(); }
LOG.info("doTestPurge delete file " + file1);
fileSys.delete(file1, true);
}
LOG.info("doTestPurge completed:" + " blockSize=" + blockSize +
" stripeLength=" + stripeLength);
}
/**
* Create a file, wait for parity file to get HARed. Then modify the file,
* wait for the HAR to get purged.
*/
public void testPurgeHar() throws Exception {
LOG.info("testPurgeHar started");
int harDelay = 0;
createClusters(true);
mySetup(1, 1, 5, harDelay);
Path dir = new Path("/user/dhruba/raidtest/");
Path destPath = new Path("/destraid/user/dhruba/raidtest");
Path file1 = new Path(dir + "/file");
RaidNode cnode = null;
try {
TestRaidNode.createOldFile(fileSys, file1, 1, 8, 8192L);
LOG.info("testPurgeHar created test files");
// create an instance of the RaidNode
Configuration localConf = new Configuration(conf);
localConf.set(RaidNode.RAID_LOCATION_KEY, "/destraid");
cnode = RaidNode.createRaidNode(null, localConf);
// Wait till har is created.
while (true) {
try {
FileStatus[] listPaths = listPaths = fileSys.listStatus(destPath);
if (listPaths != null && listPaths.length == 1) {
FileStatus s = listPaths[0];
LOG.info("testPurgeHar found path " + s.getPath());
if (s.getPath().toString().endsWith(".har")) {
break;
}
}
} catch (FileNotFoundException e) {
//ignore
}
Thread.sleep(1000); // keep waiting
}
// Set an old timestamp.
fileSys.setTimes(file1, 0, 0);
boolean found = false;
FileStatus[] listPaths = null;
while (!found || listPaths == null || listPaths.length > 1) {
try {
listPaths = fileSys.listStatus(destPath);
} catch (FileNotFoundException e) {
// If the parent directory is deleted because the har is deleted
// and the parent is empty, try again.
Thread.sleep(1000);
continue;
}
if (listPaths != null) {
for (FileStatus s: listPaths) {
LOG.info("testPurgeHar waiting for parity file to be recreated" +
" and har to be deleted found " + s.getPath());
if (s.getPath().toString().endsWith("file") &&
s.getModificationTime() == 0) {
found = true;
}
}
}
Thread.sleep(1000);
}
} catch (Exception e) {
LOG.info("testPurgeHar Exception " + e +
StringUtils.stringifyException(e));
throw e;
} finally {
if (cnode != null) { cnode.stop(); cnode.join(); }
fileSys.delete(dir, true);
fileSys.delete(destPath, true);
stopClusters();
}
}
/**
* Create parity file, delete original file's directory and then validate that
* parity directory is automatically deleted.
*/
public void testPurgeDirectory() throws Exception {
long stripeLength = 5;
long blockSize = 8192;
long targetReplication = 1;
long metaReplication = 1;
int numBlock = 9;
createClusters(true);
mySetup(targetReplication, metaReplication, stripeLength);
Path dir = new Path("/user/dhruba/raidtest/");
Path file1 = new Path(dir + "/file1");
RaidNode cnode = null;
try {
TestRaidNode.createOldFile(fileSys, file1, 1, numBlock, blockSize);
// create an instance of the RaidNode
Configuration localConf = new Configuration(conf);
localConf.set(RaidNode.RAID_LOCATION_KEY, "/destraid");
cnode = RaidNode.createRaidNode(null, localConf);
Path destPath = new Path("/destraid/user/dhruba/raidtest");
TestRaidDfs.waitForFileRaided(LOG, fileSys, file1, destPath);
// delete original directory.
assertTrue("Unable to delete original directory " + file1 ,
fileSys.delete(file1.getParent(), true));
LOG.info("deleted file " + file1);
// wait till parity file and directory are automatically deleted
long start = System.currentTimeMillis();
while (fileSys.exists(destPath) &&
System.currentTimeMillis() - start < 120000) {
LOG.info("testPurgeDirectory waiting for parity files to be removed.");
Thread.sleep(1000); // keep waiting
}
assertFalse(fileSys.exists(destPath));
} catch (Exception e) {
LOG.info("testPurgeDirectory Exception " + e +
StringUtils.stringifyException(e));
throw e;
} finally {
if (cnode != null) { cnode.stop(); cnode.join(); }
LOG.info("testPurgeDirectory delete file " + file1);
fileSys.delete(file1, true);
stopClusters();
}
}
/**
* Test that an XOR parity file is removed when a RS parity file is detected.
*/
public void testPurgePreference() throws Exception {
createClusters(true);
Path dir = new Path("/user/test/raidtest/");
Path file1 = new Path(dir + "/file1");
PolicyInfo infoXor = new PolicyInfo("testPurgePreference", conf);
infoXor.setSrcPath("/user/test/raidtest");
infoXor.setErasureCode("xor");
infoXor.setDescription("test policy");
infoXor.setProperty("targetReplication", "2");
infoXor.setProperty("metaReplication", "2");
PolicyInfo infoRs = new PolicyInfo("testPurgePreference", conf);
infoRs.setSrcPath("/user/test/raidtest");
infoRs.setErasureCode("rs");
infoRs.setDescription("test policy");
infoRs.setProperty("targetReplication", "1");
infoRs.setProperty("metaReplication", "1");
try {
TestRaidNode.createOldFile(fileSys, file1, 1, 9, 8192L);
FileStatus stat = fileSys.getFileStatus(file1);
// Create the parity files.
RaidNode.doRaid(
conf, infoXor, stat, new RaidNode.Statistics(), Reporter.NULL);
RaidNode.doRaid(
conf, infoRs, stat, new RaidNode.Statistics(), Reporter.NULL);
Path xorParity =
new Path(RaidNode.DEFAULT_RAID_LOCATION, "user/test/raidtest/file1");
Path rsParity =
new Path(RaidNode.DEFAULT_RAIDRS_LOCATION, "user/test/raidtest/file1");
assertTrue(fileSys.exists(xorParity));
assertTrue(fileSys.exists(rsParity));
// Check purge of a single parity file.
RaidNode cnode = RaidNode.createRaidNode(conf);
FileStatus raidRsStat =
fileSys.getFileStatus(new Path(RaidNode.DEFAULT_RAIDRS_LOCATION));
cnode.purgeMonitor.recursePurge(infoRs.getErasureCode(), fileSys, fileSys,
RaidNode.DEFAULT_RAIDRS_LOCATION, raidRsStat);
// Calling purge under the RS path has no effect.
assertTrue(fileSys.exists(xorParity));
assertTrue(fileSys.exists(rsParity));
FileStatus raidStat =
fileSys.getFileStatus(new Path(RaidNode.DEFAULT_RAID_LOCATION));
cnode.purgeMonitor.recursePurge(infoXor.getErasureCode(), fileSys, fileSys,
RaidNode.DEFAULT_RAID_LOCATION, raidStat);
// XOR parity must have been purged by now.
assertFalse(fileSys.exists(xorParity));
assertTrue(fileSys.exists(rsParity));
// Now check the purge of a parity har.
// Delete the RS parity for now.
fileSys.delete(rsParity);
// Recreate the XOR parity.
Path xorHar =
new Path(RaidNode.DEFAULT_RAID_LOCATION, "user/test/raidtest/raidtest" +
RaidNode.HAR_SUFFIX);
RaidNode.doRaid(
conf, infoXor, stat, new RaidNode.Statistics(), Reporter.NULL);
assertTrue(fileSys.exists(xorParity));
assertFalse(fileSys.exists(xorHar));
// Create the har.
long cutoff = System.currentTimeMillis();
cnode.recurseHar(infoXor, fileSys, raidStat,
RaidNode.DEFAULT_RAID_LOCATION, fileSys, cutoff,
RaidNode.tmpHarPathForCode(conf, infoXor.getErasureCode()));
// Call purge to get rid of the parity file. The har should remain.
cnode.purgeMonitor.recursePurge(infoXor.getErasureCode(), fileSys, fileSys,
RaidNode.DEFAULT_RAID_LOCATION, raidStat);
// XOR har should exist but xor parity file should have been purged.
assertFalse(fileSys.exists(xorParity));
assertTrue(fileSys.exists(xorHar));
// Now create the RS parity.
RaidNode.doRaid(
conf, infoRs, stat, new RaidNode.Statistics(), Reporter.NULL);
cnode.purgeMonitor.recursePurge(infoXor.getErasureCode(), fileSys, fileSys,
RaidNode.DEFAULT_RAID_LOCATION, raidStat);
// XOR har should get deleted.
assertTrue(fileSys.exists(rsParity));
assertFalse(fileSys.exists(xorParity));
assertFalse(fileSys.exists(xorHar));
} finally {
stopClusters();
}
}
}