/**
* 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.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.Set;
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.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.TestRaidDfs;
import org.apache.hadoop.mapred.Counters;
import org.apache.hadoop.mapred.MiniMRCluster;
import org.apache.hadoop.raid.protocol.PolicyInfo;
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.hdfs.protocol.DataTransferProtocol;
import org.apache.hadoop.raid.DistRaid.Counter;
import org.apache.hadoop.raid.PlacementMonitor.BlockInfo;
import org.apache.hadoop.raid.Utils.Builder;
/**
* Test the generation of parity blocks for files with different block
* sizes. Also test that a data block can be regenerated from a raid stripe
* using the parity block
*/
public class TestRaidNode 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 static Random rand = new Random();
Configuration conf;
String namenode = null;
String hftp = null;
MiniDFSCluster dfs = null;
MiniMRCluster mr = null;
FileSystem fileSys = null;
String jobTrackerName = null;
private void loadTestCodecs(int xorStripeLength, int rsStripeLength,
int xorParityLength, int rsParityLength)
throws IOException {
Utils.loadTestCodecs(conf, new Builder[] {
// priority 100
Utils.getXORBuilder().setStripeLength(xorStripeLength).setParityLength(
xorParityLength),
Utils.getXORBuilder().dirRaid(true).setParityDir(
"/dir-raid").setStripeLength(xorStripeLength).setParityLength(
xorParityLength).setCodeId("dir-xor").setPriority(101),
// priority 300
Utils.getRSBuilder().setStripeLength(rsStripeLength).setParityLength(
rsParityLength),
Utils.getRSBuilder().dirRaid(true).setParityDir(
"/dir-raidrs").setStripeLength(rsStripeLength).setParityLength(
rsParityLength).setCodeId("dir-rs").setPriority(301)
});
}
/**
* create mapreduce and dfs clusters
*/
private void createClusters(boolean local, boolean rackAware) throws Exception {
if (System.getProperty("hadoop.log.dir") == null) {
String base = new File(".").getAbsolutePath();
System.setProperty("hadoop.log.dir", new Path(base).toString() + "/logs");
}
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);
conf.setLong(JobMonitor.JOBMONITOR_INTERVAL_KEY, 20000L);
conf.setLong(RaidNode.TRIGGER_MONITOR_SLEEP_TIME_KEY, 3000L);
conf.setLong(RaidNode.MINIMUM_RAIDABLE_FILESIZE_KEY, 1L);
// scan every policy every 5 seconds
conf.setLong("raid.policy.rescan.interval", 5 * 1000L);
// 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");
}
// use local block fixer
conf.set("raid.blockfix.classname",
"org.apache.hadoop.raid.LocalBlockIntegrityMonitor");
conf.set("dfs.block.replicator.classname",
"org.apache.hadoop.hdfs.server.namenode.BlockPlacementPolicyRaid");
conf.set("raid.server.address", "localhost:0");
this.loadTestCodecs(3, 10, 1, 5);
// create a dfs and map-reduce cluster
final int taskTrackers = 4;
final int jobTrackerPort = 60050;
if (rackAware) {
// Because BlockPlacementPolicyRaid only allows one replica in each rack,
// spread 6 nodes into 6 racks to make sure chooseTarget function could pick
// more than one node.
String[] racks = {"/rack1", "/rack2", "/rack3", "/rack4", "/rack5", "/rack6"};
dfs = new MiniDFSCluster(conf, 6, true, racks);
} else {
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);
}
/**
* stop clusters created earlier
*/
private void stopClusters() throws Exception {
if (mr != null) { mr.shutdown(); }
if (dfs != null) { dfs.shutdown(); }
}
/**
* Test to run a filter
*/
public void testPathFilter() throws Exception {
LOG.info("Test testPathFilter started.");
long blockSizes [] = {1024L};
int stripeLengths [] = {5, 6, 10, 11, 12};
int targetReplication = 1;
int metaReplication = 1;
int numBlock = 11;
int iter = 0;
createClusters(true, false);
try {
assertEquals(DataTransferProtocol.DATA_TRANSFER_VERSION,
RaidUtils.getDataTransferProtocolVersion(conf));
for (long blockSize : blockSizes) {
for (int stripeLength : stripeLengths) {
this.loadTestCodecs(stripeLength, stripeLength, 1, 3);
doTestPathFilter(iter, targetReplication, metaReplication,
stripeLength, blockSize, numBlock);
iter++;
}
}
doCheckPolicy();
} finally {
stopClusters();
}
LOG.info("Test testPathFilter completed.");
}
private void simulateErrors(RaidShell shell, Path file1, long crc, long blockSize,
long numBlock, long stripeLength) throws IOException {
if (numBlock >= 1) {
LOG.info("doTestPathFilter Check error at beginning of file.");
simulateError(shell, fileSys, file1, crc, 0);
}
// check for error at the beginning of second block
if (numBlock >= 2) {
LOG.info("doTestPathFilter Check error at beginning of second block.");
simulateError(shell, fileSys, file1, crc, blockSize + 1);
}
// check for error at the middle of third block
if (numBlock >= 3) {
LOG.info("doTestPathFilter Check error at middle of third block.");
simulateError(shell, fileSys, file1, crc, 2 * blockSize + 10);
}
// check for error at the middle of second stripe
if (numBlock >= stripeLength + 1) {
LOG.info("doTestPathFilter Check error at middle of second stripe.");
simulateError(shell, fileSys, file1, crc,
stripeLength * blockSize + 100);
}
}
/**
* Test to run a filter
*/
private void doTestPathFilter(int iter, long targetReplication,
long metaReplication, long stripeLength,
long blockSize, int numBlock) throws Exception {
LOG.info("doTestPathFilter started---------------------------:" +
" iter " + iter + " blockSize=" + blockSize + " stripeLength=" +
stripeLength);
ConfigBuilder cb = new ConfigBuilder(CONFIG_FILE);
cb.addPolicy("policy1", "/user/dhruba/raidtest",
targetReplication, metaReplication);
cb.addPolicy("policy2", "/user/dhruba/dir-raidtest",
targetReplication, metaReplication, "dir-xor");
cb.persist();
RaidShell shell = null;
Path dir = new Path("/user/dhruba/raidtest/");
Path file1 = new Path(dir + "/file" + iter);
Path dir1 = new Path("/user/dhruba/dir-raidtest/1");
Path file2 = new Path(dir1 + "/file2");
Path file3 = new Path(dir1 + "/file3");
RaidNode cnode = null;
try {
Path destPath = new Path("/raid/user/dhruba/raidtest");
Path destPath1 = new Path("/dir-raid/user/dhruba/dir-raidtest");
fileSys.delete(dir, true);
fileSys.delete(destPath, true);
fileSys.delete(dir1, true);
fileSys.delete(destPath1, true);
long crc1 = createOldFile(fileSys, file1, 1, numBlock, blockSize);
long crc2 = createOldFile(fileSys, file2, 1, numBlock, blockSize);
long crc3 = createOldFile(fileSys, file3, 1, numBlock, blockSize);
LOG.info("doTestPathFilter created test files for iteration " + iter);
// create an instance of the RaidNode
Configuration localConf = new Configuration(conf);
cnode = RaidNode.createRaidNode(null, localConf);
TestRaidDfs.waitForFileRaided(LOG, fileSys, file1, destPath);
TestRaidDfs.waitForDirRaided(LOG, fileSys, dir1, destPath1);
LOG.info("doTestPathFilter all files found in Raid.");
// check for error at beginning of file
shell = new RaidShell(conf);
shell.initializeRpc(conf, cnode.getListenerAddress());
this.simulateErrors(shell, file1, crc1, blockSize,
numBlock, stripeLength);
this.simulateErrors(shell, file2, crc2, blockSize,
numBlock, stripeLength);
this.simulateErrors(shell, file3, crc3, blockSize,
numBlock, stripeLength);
} catch (Exception e) {
LOG.info("doTestPathFilter Exception ", e);
throw e;
} finally {
if (shell != null) shell.close();
if (cnode != null) { cnode.stop(); cnode.join(); }
LOG.info("doTestPathFilter clean up" );
fileSys.delete(dir, true);
fileSys.delete(new Path("/raid"), true);
fileSys.delete(dir1, true);
fileSys.delete(new Path("/dir-raid"), true);
}
LOG.info("doTestPathFilter completed:" + " blockSize=" + blockSize +
" stripeLength=" + stripeLength);
}
// Check that raid occurs only on files that have a replication factor
// greater than or equal to the specified value
private void doCheckPolicy() throws Exception {
LOG.info("doCheckPolicy started---------------------------:");
short srcReplication = 3;
short targetReplication = 2;
long metaReplication = 1;
long stripeLength = 2;
long blockSize = 1024;
int numBlock = 3;
ConfigBuilder cb = new ConfigBuilder(CONFIG_FILE);
cb.addPolicy("policy1", "/user/dhruba/policytest", targetReplication,
metaReplication);
cb.addPolicy("policy2", "/user/dhruba/dir-policytest",
targetReplication, metaReplication, "dir-xor");
cb.persist();
Path dir = new Path("/user/dhruba/policytest/");
Path dir1 = new Path("/user/dhruba/dir-policytest/1");
Path file1 = new Path(dir + "/file1");
Path file2 = new Path(dir1 + "/file2");
Path file3 = new Path(dir1 + "/file3");
Path file4 = new Path(dir1 + "/file4");
RaidNode cnode = null;
try {
Path destPath = new Path("/raid/user/dhruba/policytest");
Path destPath1 = new Path("/dir-raid/user/dhruba/dir-policytest");
fileSys.delete(dir, true);
fileSys.delete(destPath, true);
fileSys.delete(dir1, true);
fileSys.delete(destPath1, true);
// create an instance of the RaidNode
Configuration localConf = new Configuration(conf);
cnode = RaidNode.createRaidNode(null, localConf);
// this file should be picked up RaidNode
createOldFile(fileSys, file1, 3, numBlock, blockSize);
createOldFile(fileSys, file2, 3, numBlock, blockSize);
createOldFile(fileSys, file3, 3, numBlock, blockSize);
TestRaidDfs.waitForFileRaided(LOG, fileSys, file1, destPath, targetReplication);
TestRaidDfs.waitForDirRaided(LOG, fileSys, dir1, destPath1, targetReplication);
LOG.info("doCheckPolicy all files found in Raid the first time.");
LOG.info("doCheckPolicy: recreating source file");
long firstmodetime1 = fileSys.getFileStatus(file1).getModificationTime();
createOldFile(fileSys, file1, 3, numBlock, blockSize);
assertTrue(fileSys.getFileStatus(file1).getModificationTime() > firstmodetime1);
LOG.info("Change the modification time of directory");
long firstmodetime2 = fileSys.getFileStatus(dir1).getModificationTime();
createOldFile(fileSys, file4, 3, numBlock, blockSize);
assertTrue(fileSys.getFileStatus(dir1).getModificationTime() > firstmodetime2);
TestRaidDfs.waitForFileRaided(LOG, fileSys, file1, destPath, targetReplication);
TestRaidDfs.waitForDirRaided(LOG, fileSys, dir1, destPath1, targetReplication);
LOG.info("doCheckPolicy: file got re-raided as expected.");
} catch (Exception e) {
LOG.info("doCheckPolicy Exception ", e);
throw e;
} finally {
if (cnode != null) { cnode.stop(); cnode.join(); }
LOG.info("doTestPathFilter clean up");
fileSys.delete(dir, true);
fileSys.delete(new Path("/raid"), true);
fileSys.delete(dir1, true);
fileSys.delete(new Path("/dir-raid"), true);
}
LOG.info("doCheckPolicy completed:");
}
static public void createTestFiles(FileSystem fileSys,
String path, String destpath, int nfile,
int nblock) throws IOException {
createTestFiles(fileSys, path, destpath, nfile, nblock, (short)1);
}
static void createTestFiles(FileSystem fileSys, String path, String destpath, int nfile,
int nblock, short repl) throws IOException {
long blockSize = 1024L;
Path dir = new Path(path);
Path destPath = new Path(destpath);
fileSys.delete(dir, true);
fileSys.delete(destPath, true);
for(int i = 0 ; i < nfile; i++){
Path file = new Path(dir, "file" + i);
createOldFile(fileSys, file, repl, nblock, blockSize);
}
}
private void checkTestFiles(String srcDir, String parityDir, int stripeLength,
short targetReplication, short metaReplication, PlacementMonitor pm,
Codec codec, int nfiles) throws IOException {
for(int i = 0 ; i < nfiles; i++){
Path srcPath = new Path(srcDir, "file" + i);
Path parityPath = null;
if (codec.isDirRaid) {
parityPath = new Path(parityDir);
} else {
parityPath = new Path(parityDir, "file" + i);
}
FileStatus srcFile = fileSys.getFileStatus(srcPath);
FileStatus parityStat = fileSys.getFileStatus(parityPath);
assertEquals(srcFile.getReplication(), targetReplication);
assertEquals(parityStat.getReplication(), metaReplication);
List<BlockInfo> parityBlocks = pm.getBlockInfos(fileSys, parityStat);
int parityLength = codec.parityLength;
if (parityLength == 1) {
continue;
}
if (codec.isDirRaid && i > 0) {
// One directory has one parity, just need to check once
continue;
}
long numBlocks;
if (codec.isDirRaid) {
List<FileStatus> lfs = RaidNode.listDirectoryRaidFileStatus(conf, fileSys,
new Path(srcDir));
numBlocks = DirectoryStripeReader.getBlockNum(lfs);
} else {
numBlocks = RaidNode.numBlocks(srcFile);
}
int numStripes = (int)RaidNode.numStripes(numBlocks, stripeLength);
Map<String, Integer> nodeToNumBlocks = new HashMap<String, Integer>();
Set<String> nodesInThisStripe = new HashSet<String>();
for (int stripeIndex = 0; stripeIndex < numStripes; ++stripeIndex) {
List<BlockInfo> stripeBlocks = new ArrayList<BlockInfo>();
// Adding parity blocks
int stripeStart = parityLength * stripeIndex;
int stripeEnd = Math.min(
stripeStart + parityLength, parityBlocks.size());
if (stripeStart < stripeEnd) {
stripeBlocks.addAll(parityBlocks.subList(stripeStart, stripeEnd));
}
PlacementMonitor.countBlocksOnEachNode(stripeBlocks, nodeToNumBlocks, nodesInThisStripe);
LOG.info("file: " + parityPath + " stripe: " + stripeIndex);
int max = 0;
for (String node: nodeToNumBlocks.keySet()) {
int count = nodeToNumBlocks.get(node);
LOG.info("node:" + node + " count:" + count);
if (max < count) {
max = count;
}
}
assertTrue("pairty blocks in a stripe cannot live in the same node", max<parityLength);
}
}
}
/**
* Test dist Raid
*/
public void testDistRaid() throws Exception {
LOG.info("Test testDistRaid started.");
short targetReplication = 2;
short metaReplication = 2;
short rstargetReplication = 1;
short rsmetaReplication = 1;
short xorstripeLength = 3;
int rsstripeLength = 10;
createClusters(false, true);
ConfigBuilder cb = new ConfigBuilder(CONFIG_FILE);
cb.addPolicy("policy1", "/user/dhruba/raidtest",
targetReplication, metaReplication);
cb.addAbstractPolicy("abstractPolicy", targetReplication,
metaReplication, "xor");
cb.addPolicy("policy2", "/user/dhruba/raidtest2", "abstractPolicy");
cb.addPolicy("policy3", "/user/dhruba/raidtest3",
rstargetReplication, rsmetaReplication, "rs");
cb.addPolicy("policy4", "/user/dhruba/dir-raidtest/",
targetReplication, metaReplication, "dir-xor");
cb.addPolicy("policy5", "/user/dhruba/dir-raidtestrs/",
rstargetReplication, rsmetaReplication, "dir-rs");
cb.persist();
RaidNode cnode = null;
try {
createTestFiles(fileSys, "/user/dhruba/raidtest/",
"/raid/user/dhruba/raidtest", 5, 7);
createTestFiles(fileSys, "/user/dhruba/raidtest2/",
"/raid/user/dhruba/raidtest2", 5, 7);
createTestFiles(fileSys, "/user/dhruba/raidtest3/",
"/raidrs/user/dhruba/raidtest3", 1, 10);
createTestFiles(fileSys, "/user/dhruba/dir-raidtest/1/",
"/dir-raid/user/dhruba/dir-raidtest/1", 5, 7);
createTestFiles(fileSys, "/user/dhruba/dir-raidtestrs/2/",
"/dir-raidrs/user/dhruba/dir-raidtestrs/2", 2, 8);
LOG.info("Test testDistRaid created test files");
Configuration localConf = new Configuration(conf);
//Avoid block mover to move blocks
localConf.setInt(PlacementMonitor.BLOCK_MOVE_QUEUE_LENGTH_KEY, 0);
localConf.setInt(PlacementMonitor.NUM_MOVING_THREADS_KEY, 1);
cnode = RaidNode.createRaidNode(null, localConf);
// Verify the policies are parsed correctly
for (PolicyInfo p: cnode.getAllPolicies()) {
if (p.getName().equals("policy1")) {
Path srcPath = new Path("/user/dhruba/raidtest");
assertTrue(p.getSrcPath().equals(
srcPath.makeQualified(srcPath.getFileSystem(conf))));
} else if (p.getName().equals("policy2")) {
Path srcPath = new Path("/user/dhruba/raidtest2");
assertTrue(p.getSrcPath().equals(
srcPath.makeQualified(srcPath.getFileSystem(conf))));
} else if (p.getName().equals("policy3")){
Path srcPath = new Path("/user/dhruba/raidtest3");
assertTrue(p.getSrcPath().equals(
srcPath.makeQualified(srcPath.getFileSystem(conf))));
} else if (p.getName().equals("policy4")) {
Path srcPath = new Path("/user/dhruba/dir-raidtest/");
assertTrue(p.getSrcPath().equals(
srcPath.makeQualified(srcPath.getFileSystem(conf))));
} else {
assertEquals(p.getName(), "policy5");
Path srcPath = new Path("/user/dhruba/dir-raidtestrs/");
assertTrue(p.getSrcPath().equals(
srcPath.makeQualified(srcPath.getFileSystem(conf))));
}
if (p.getName().equals("policy3") || p.getName().equals("policy5")) {
if (p.getName().equals("policy3")) {
assertTrue(p.getCodecId().equals("rs"));
} else {
assertTrue(p.getCodecId().equals("dir-rs"));
}
assertEquals(rstargetReplication,
Integer.parseInt(p.getProperty("targetReplication")));
assertEquals(rsmetaReplication,
Integer.parseInt(p.getProperty("metaReplication")));
} else {
if (p.getName().equals("policy4")) {
assertTrue(p.getCodecId().equals("dir-xor"));
} else {
assertTrue(p.getCodecId().equals("xor"));
}
assertEquals(targetReplication,
Integer.parseInt(p.getProperty("targetReplication")));
assertEquals(metaReplication,
Integer.parseInt(p.getProperty("metaReplication")));
}
}
long start = System.currentTimeMillis();
final int MAX_WAITTIME = 120000;
assertTrue("cnode is not DistRaidNode", cnode instanceof DistRaidNode);
DistRaidNode dcnode = (DistRaidNode) cnode;
while (dcnode.jobMonitor.jobsMonitored() < 5 &&
System.currentTimeMillis() - start < MAX_WAITTIME) {
Thread.sleep(1000);
}
start = System.currentTimeMillis();
while (dcnode.jobMonitor.jobsSucceeded() < dcnode.jobMonitor.jobsMonitored() &&
System.currentTimeMillis() - start < MAX_WAITTIME) {
Thread.sleep(1000);
}
assertEquals(dcnode.jobMonitor.jobsSucceeded(), dcnode.jobMonitor.jobsMonitored());
checkTestFiles("/user/dhruba/raidtest/", "/raid/user/dhruba/raidtest",
xorstripeLength, targetReplication, metaReplication, dcnode.placementMonitor,
Codec.getCodec("xor"), 5);
checkTestFiles("/user/dhruba/raidtest2/", "/raid/user/dhruba/raidtest2",
xorstripeLength, targetReplication, metaReplication, dcnode.placementMonitor,
Codec.getCodec("xor"), 5);
checkTestFiles("/user/dhruba/raidtest3/", "/raidrs/user/dhruba/raidtest3",
rsstripeLength, rstargetReplication, rsmetaReplication, dcnode.placementMonitor,
Codec.getCodec("rs"), 1);
checkTestFiles("/user/dhruba/dir-raidtest/1/", "/dir-raid/user/dhruba/dir-raidtest/1",
xorstripeLength, targetReplication, metaReplication, dcnode.placementMonitor,
Codec.getCodec("dir-xor"), 5);
checkTestFiles("/user/dhruba/dir-raidtestrs/2/", "/dir-raidrs/user/dhruba/dir-raidtestrs/2",
rsstripeLength, rstargetReplication, rsmetaReplication, dcnode.placementMonitor,
Codec.getCodec("dir-rs"), 2);
LOG.info("Test testDistRaid successful.");
} catch (Exception e) {
LOG.info("testDistRaid Exception " + e + StringUtils.stringifyException(e));
throw e;
} finally {
if (cnode != null) { cnode.stop(); cnode.join(); }
stopClusters();
}
LOG.info("Test testDistRaid completed.");
}
//
// simulate a corruption at specified offset and verify that eveyrthing is good
//
void simulateError(RaidShell shell, FileSystem fileSys, Path file1,
long crc, long corruptOffset) throws IOException {
// recover the file assuming that we encountered a corruption at offset 0
String[] args = new String[3];
args[0] = "-recover";
args[1] = file1.toString();
args[2] = Long.toString(corruptOffset);
Path recover1 = shell.recover(args[0], args, 1)[0];
// compare that the recovered file is identical to the original one
LOG.info("Comparing file " + file1 + " with recovered file " + recover1);
validateFile(fileSys, file1, recover1, crc);
fileSys.delete(recover1, false);
}
//
// creates a file and populate it with random data. Returns its crc.
//
static long createOldFile(FileSystem fileSys, Path name, int repl, int numBlocks, long blocksize)
throws IOException {
CRC32 crc = new CRC32();
FSDataOutputStream stm = fileSys.create(name, true,
fileSys.getConf().getInt("io.file.buffer.size", 4096),
(short)repl, blocksize);
// fill random data into file
byte[] b = new byte[(int)blocksize];
for (int i = 0; i < numBlocks; i++) {
if (i == (numBlocks-1)) {
b = new byte[(int)blocksize/2];
}
rand.nextBytes(b);
stm.write(b);
crc.update(b);
}
stm.close();
return crc.getValue();
}
//
// validates that file matches the crc.
//
private void validateFile(FileSystem fileSys, Path name1, Path name2, long crc)
throws IOException {
FileStatus stat1 = fileSys.getFileStatus(name1);
FileStatus stat2 = fileSys.getFileStatus(name2);
assertTrue(" Length of file " + name1 + " is " + stat1.getLen() +
" is different from length of file " + name1 + " " + stat2.getLen(),
stat1.getLen() == stat2.getLen());
CRC32 newcrc = new CRC32();
FSDataInputStream stm = fileSys.open(name2);
final byte[] b = new byte[4192];
int num = 0;
while (num >= 0) {
num = stm.read(b);
if (num < 0) {
break;
}
newcrc.update(b, 0, num);
}
stm.close();
if (newcrc.getValue() != crc) {
fail("CRC mismatch of files " + name1 + " with file " + name2);
}
}
public void testSuspendTraversal() throws Exception {
LOG.info("Test testSuspendTraversal started.");
long targetReplication = 2;
long metaReplication = 2;
createClusters(false, false);
ConfigBuilder cb = new ConfigBuilder(CONFIG_FILE);
cb.addPolicy("policy1", "/user/dhruba/raidtest", targetReplication, metaReplication);
cb.persist();
RaidNode cnode = null;
try {
for(int i = 0; i < 6; i++){
Path file = new Path("/user/dhruba/raidtest/dir" + i + "/file" + i);
createOldFile(fileSys, file, 1, 7, 1024L);
}
LOG.info("Test testSuspendTraversal created test files");
Configuration localConf = new Configuration(conf);
localConf.setInt("raid.distraid.max.jobs", 3);
localConf.setInt("raid.distraid.max.files", 2);
localConf.setInt("raid.directorytraversal.threads", 1);
localConf.setBoolean(StatisticsCollector.STATS_COLLECTOR_SUBMIT_JOBS_CONFIG, false);
// 6 test files: 3 jobs with 2 files each.
final int numJobsExpected = 3;
cnode = RaidNode.createRaidNode(null, localConf);
long start = System.currentTimeMillis();
final int MAX_WAITTIME = 300000;
assertTrue("cnode is not DistRaidNode", cnode instanceof DistRaidNode);
DistRaidNode dcnode = (DistRaidNode) cnode;
start = System.currentTimeMillis();
while (dcnode.jobMonitor.jobsSucceeded() < numJobsExpected &&
System.currentTimeMillis() - start < MAX_WAITTIME) {
LOG.info("Waiting for num jobs succeeded " + dcnode.jobMonitor.jobsSucceeded() +
" to reach " + numJobsExpected);
Thread.sleep(3000);
}
// Wait for any running jobs to finish.
start = System.currentTimeMillis();
while (dcnode.jobMonitor.runningJobsCount() > 0 &&
System.currentTimeMillis() - start < MAX_WAITTIME) {
LOG.info("Waiting for zero running jobs: " +
dcnode.jobMonitor.runningJobsCount());
Thread.sleep(1000);
}
assertEquals(numJobsExpected, dcnode.jobMonitor.jobsMonitored());
assertEquals(numJobsExpected, dcnode.jobMonitor.jobsSucceeded());
LOG.info("Test testSuspendTraversal successful.");
} catch (Exception e) {
LOG.info("testSuspendTraversal Exception " + e + StringUtils.stringifyException(e));
throw e;
} finally {
if (cnode != null) { cnode.stop(); cnode.join(); }
stopClusters();
}
LOG.info("Test testSuspendTraversal completed.");
}
public void testFileListPolicy() throws Exception {
LOG.info("Test testFileListPolicy started.");
short targetReplication = 2;
short metaReplication = 2;
long stripeLength = 3;
short srcReplication = 3;
createClusters(false, false);
// don't allow rescan, make sure only one job is submitted.
conf.setLong("raid.policy.rescan.interval", 60 * 1000L);
ConfigBuilder cb = new ConfigBuilder(CONFIG_FILE);
cb.addAbstractPolicy("abstractPolicy", targetReplication, metaReplication,
"xor");
cb.addFileListPolicy("policy2", "/user/rvadali/raidfilelist.txt", "abstractPolicy");
cb.addAbstractPolicy("abstractPolicy2", targetReplication, metaReplication,
"dir-xor");
cb.addFileListPolicy("policy3", "/user/rvadali/raiddirlist.txt", "abstractPolicy2");
cb.persist();
RaidNode cnode = null;
Path fileListPath = new Path("/user/rvadali/raidfilelist.txt");
Path dirListPath = new Path("/user/rvadali/raiddirlist.txt");
try {
createTestFiles(fileSys, "/user/rvadali/raidtest/",
"/raid/user/rvadali/raidtest", 5, 7, srcReplication);
createTestFiles(fileSys, "/user/rvadali/dir-raidtest/1/",
"/dir-raid/user/rvadali/dir-raidtest/1", 2, 7, srcReplication);
// althought the files reach the target replication, because
// they don't have parities, we are still going to raid them.
createTestFiles(fileSys, "/user/rvadali/dir-raidtest/2/",
"/dir-raid/user/rvadali/dir-raidtest/2", 2, 7, targetReplication);
// generate parities files for the following directory, raidnode
// won't raid them again
Path srcDir3 = new Path("/user/rvadali/dir-raidtest/3/");
Path destPath3 = new Path("/dir-raid/user/rvadali/dir-raidtest/3");
createTestFiles(fileSys, srcDir3.toString(), destPath3.toString(), 2, 4,
targetReplication);
Codec dirCode = Codec.getCodec("dir-xor");
FileStatus srcStat3 = fileSys.getFileStatus(srcDir3);
assertTrue(RaidNode.doRaid(conf, srcStat3,
new Path(dirCode.parityDirectory), dirCode, new RaidNode.Statistics(),
RaidUtils.NULL_PROGRESSABLE, false, targetReplication, metaReplication));
FileStatus parityStat3 = fileSys.getFileStatus(destPath3);
assertEquals(parityStat3.getModificationTime(), srcStat3.getModificationTime());
assertEquals(parityStat3.getReplication(), metaReplication);
LOG.info("Test testFileListPolicy created test files");
// Create list of files to raid.
FSDataOutputStream out = fileSys.create(fileListPath);
FileStatus[] files = fileSys.listStatus(new Path("/user/rvadali/raidtest"));
for (FileStatus f: files) {
out.write(f.getPath().toString().getBytes());
out.write("\n".getBytes());
}
// write directory, we should filter it.
out.write("/user/rvadali/raidtest/\n".getBytes());
out.close();
FSDataOutputStream dirOut = fileSys.create(dirListPath);
FileStatus[] dirs = fileSys.listStatus(new Path("/user/rvadali/dir-raidtest"));
for (FileStatus dir: dirs) {
dirOut.write(dir.getPath().toString().getBytes());
dirOut.write("\n".getBytes());
}
// write file, we should filter it
dirOut.write("/user/rvadali/raidtest/file0\n".getBytes());
dirOut.close();
cnode = RaidNode.createRaidNode(conf);
final int MAX_WAITTIME = 120000;
DistRaidNode dcnode = (DistRaidNode) cnode;
long start = System.currentTimeMillis();
int numJobsExpected = 2;
while (dcnode.jobMonitor.jobsSucceeded() < numJobsExpected &&
System.currentTimeMillis() - start < MAX_WAITTIME) {
LOG.info("Waiting for num jobs succeeded " + dcnode.jobMonitor.jobsSucceeded() +
" to reach " + numJobsExpected);
Thread.sleep(1000);
}
assertEquals(numJobsExpected, dcnode.jobMonitor.jobsMonitored());
assertEquals(numJobsExpected, dcnode.jobMonitor.jobsSucceeded());
Path destPath = new Path("/raid/user/rvadali/raidtest");
for (FileStatus file : files) {
TestRaidDfs.waitForFileRaided(LOG, fileSys, file.getPath(), destPath,
targetReplication);
}
Path destPath1 = new Path("/dir-raid/user/rvadali/dir-raidtest");
for (FileStatus dir : dirs) {
TestRaidDfs.waitForDirRaided(LOG, fileSys, dir.getPath(), destPath1,
targetReplication);
}
Map<String, Counters> raidProgress = dcnode.jobMonitor.getRaidProgress();
long succeedFiles = 0;
for (Counters ctrs: raidProgress.values()) {
Counters.Counter ctr = ctrs.findCounter(Counter.FILES_SUCCEEDED);
succeedFiles += ctr.getValue();
}
// We have one raided directory, so it's total - 1;
assertEquals(succeedFiles, files.length + dirs.length -1);
LOG.info("Test testFileListPolicy successful.");
} catch (Exception e) {
LOG.info("testFileListPolicy Exception " + e + StringUtils.stringifyException(e));
throw e;
} finally {
if (cnode != null) { cnode.stop(); cnode.join(); }
stopClusters();
}
LOG.info("Test testFileListPolicy completed.");
}
}