HADOOP-18023. Allow cp command to run with multi threads. (#3721)
This commit is contained in:
smarthan
GitHub
parent
829af89dc4
commit
932a78fe38
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@ -147,33 +147,40 @@ class CopyCommands {
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}
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}
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static class Cp extends CommandWithDestination {
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static class Cp extends CopyCommandWithMultiThread {
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public static final String NAME = "cp";
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public static final String USAGE =
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"[-f] [-p | -p[topax]] [-d] <src> ... <dst>";
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"[-f] [-p | -p[topax]] [-d] [-t <thread count>]"
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+ " [-q <thread pool queue size>] <src> ... <dst>";
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public static final String DESCRIPTION =
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"Copy files that match the file pattern <src> to a " +
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"destination. When copying multiple files, the destination " +
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"must be a directory. Passing -p preserves status " +
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"[topax] (timestamps, ownership, permission, ACLs, XAttr). " +
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"If -p is specified with no <arg>, then preserves " +
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"timestamps, ownership, permission. If -pa is specified, " +
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"then preserves permission also because ACL is a super-set of " +
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"permission. Passing -f overwrites the destination if it " +
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"already exists. raw namespace extended attributes are preserved " +
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"if (1) they are supported (HDFS only) and, (2) all of the source and " +
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"target pathnames are in the /.reserved/raw hierarchy. raw namespace " +
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"xattr preservation is determined solely by the presence (or absence) " +
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"of the /.reserved/raw prefix and not by the -p option. Passing -d "+
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"will skip creation of temporary file(<dst>._COPYING_).\n";
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"Copy files that match the file pattern <src> to a destination."
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+ " When copying multiple files, the destination must be a "
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+ "directory.\nFlags :\n"
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+ " -p[topax] : Preserve file attributes [topx] (timestamps, "
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+ "ownership, permission, ACL, XAttr). If -p is specified with "
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+ "no arg, then preserves timestamps, ownership, permission. "
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+ "If -pa is specified, then preserves permission also because "
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+ "ACL is a super-set of permission. Determination of whether raw "
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+ "namespace extended attributes are preserved is independent of "
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+ "the -p flag.\n"
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+ " -f : Overwrite the destination if it already exists.\n"
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+ " -d : Skip creation of temporary file(<dst>._COPYING_).\n"
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+ " -t <thread count> : Number of threads to be used, "
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+ "default is 1.\n"
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+ " -q <thread pool queue size> : Thread pool queue size to be "
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+ "used, default is 1024.\n";
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@Override
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protected void processOptions(LinkedList<String> args) throws IOException {
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popPreserveOption(args);
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CommandFormat cf = new CommandFormat(2, Integer.MAX_VALUE, "f", "d");
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cf.addOptionWithValue("t");
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cf.addOptionWithValue("q");
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cf.parse(args);
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setDirectWrite(cf.getOpt("d"));
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setOverwrite(cf.getOpt("f"));
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setThreadCount(cf.getOptValue("t"));
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setThreadPoolQueueSize(cf.getOptValue("q"));
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// should have a -r option
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setRecursive(true);
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getRemoteDestination(args);
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@ -177,7 +177,7 @@ Returns 0 on success and -1 on error.
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cp
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----
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Usage: `hadoop fs -cp [-f] [-p | -p[topax]] URI [URI ...] <dest> `
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Usage: `hadoop fs -cp [-f] [-p | -p[topax]] [-t <thread count>] [-q <thread pool queue size>] URI [URI ...] <dest>`
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Copy files from source to destination. This command allows multiple sources as well in which case the destination must be a directory.
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@ -185,13 +185,18 @@ Copy files from source to destination. This command allows multiple sources as w
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Options:
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* The -f option will overwrite the destination if it already exists.
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* The -p option will preserve file attributes [topx] (timestamps, ownership, permission, ACL, XAttr). If -p is specified with no *arg*, then preserves timestamps, ownership, permission. If -pa is specified, then preserves permission also because ACL is a super-set of permission. Determination of whether raw namespace extended attributes are preserved is independent of the -p flag.
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* `-f` : Overwrite the destination if it already exists.
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* `-d` : Skip creation of temporary file with the suffix `._COPYING_`.
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* `-p` : Preserve file attributes [topx] (timestamps, ownership, permission, ACL, XAttr). If -p is specified with no *arg*, then preserves timestamps, ownership, permission. If -pa is specified, then preserves permission also because ACL is a super-set of permission. Determination of whether raw namespace extended attributes are preserved is independent of the -p flag.
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* `-t <thread count>` : Number of threads to be used, default is 1. Useful when copying directories containing more than 1 file.
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* `-q <thread pool queue size>` : Thread pool queue size to be used, default is 1024. It takes effect only when thread count greater than 1.
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Example:
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* `hadoop fs -cp /user/hadoop/file1 /user/hadoop/file2`
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* `hadoop fs -cp /user/hadoop/file1 /user/hadoop/file2 /user/hadoop/dir`
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* `hadoop fs -cp -t 5 /user/hadoop/file1 /user/hadoop/file2 /user/hadoop/dir`
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* `hadoop fs -cp -t 10 -q 2048 /user/hadoop/file1 /user/hadoop/file2 /user/hadoop/dir`
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Exit Code:
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@ -0,0 +1,210 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.fs.shell;
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import java.io.IOException;
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import java.util.LinkedList;
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import java.util.concurrent.ThreadPoolExecutor;
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import org.junit.AfterClass;
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import org.junit.Assert;
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import org.junit.Before;
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import org.junit.BeforeClass;
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import org.junit.Test;
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import org.apache.commons.lang3.RandomStringUtils;
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import org.apache.commons.lang3.RandomUtils;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.fs.FSDataOutputStream;
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import org.apache.hadoop.fs.FileSystem;
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import org.apache.hadoop.fs.FileSystemTestHelper;
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import org.apache.hadoop.fs.LocalFileSystem;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.fs.shell.CopyCommands.Cp;
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import static org.apache.hadoop.fs.shell.CopyCommandWithMultiThread.DEFAULT_QUEUE_SIZE;
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import static org.junit.Assert.assertEquals;
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public class TestCpCommand {
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private static final String FROM_DIR_NAME = "fromDir";
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private static final String TO_DIR_NAME = "toDir";
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private static FileSystem fs;
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private static Path testDir;
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private static Configuration conf;
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private Path dir = null;
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private int numFiles = 0;
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private static int initialize(Path dir) throws Exception {
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fs.mkdirs(dir);
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Path fromDirPath = new Path(dir, FROM_DIR_NAME);
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fs.mkdirs(fromDirPath);
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Path toDirPath = new Path(dir, TO_DIR_NAME);
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fs.mkdirs(toDirPath);
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int numTotalFiles = 0;
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int numDirs = RandomUtils.nextInt(0, 5);
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for (int dirCount = 0; dirCount < numDirs; ++dirCount) {
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Path subDirPath = new Path(fromDirPath, "subdir" + dirCount);
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fs.mkdirs(subDirPath);
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int numFiles = RandomUtils.nextInt(0, 10);
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for (int fileCount = 0; fileCount < numFiles; ++fileCount) {
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numTotalFiles++;
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Path subFile = new Path(subDirPath, "file" + fileCount);
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fs.createNewFile(subFile);
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FSDataOutputStream output = fs.create(subFile, true);
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for (int i = 0; i < 100; ++i) {
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output.writeInt(i);
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output.writeChar('\n');
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}
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output.close();
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}
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}
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return numTotalFiles;
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}
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@BeforeClass
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public static void init() throws Exception {
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conf = new Configuration(false);
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conf.set("fs.file.impl", LocalFileSystem.class.getName());
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fs = FileSystem.getLocal(conf);
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testDir = new FileSystemTestHelper().getTestRootPath(fs);
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// don't want scheme on the path, just an absolute path
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testDir = new Path(fs.makeQualified(testDir).toUri().getPath());
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FileSystem.setDefaultUri(conf, fs.getUri());
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fs.setWorkingDirectory(testDir);
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}
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@AfterClass
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public static void cleanup() throws Exception {
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fs.delete(testDir, true);
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fs.close();
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}
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private void run(CopyCommandWithMultiThread cmd, String... args) {
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cmd.setConf(conf);
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assertEquals(0, cmd.run(args));
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}
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@Before
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public void initDirectory() throws Exception {
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dir = new Path("dir" + RandomStringUtils.randomNumeric(4));
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numFiles = initialize(dir);
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}
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@Test(timeout = 10000)
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public void testCp() throws Exception {
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MultiThreadedCp copy = new MultiThreadedCp(1, DEFAULT_QUEUE_SIZE, 0);
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run(copy, new Path(dir, FROM_DIR_NAME).toString(),
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new Path(dir, TO_DIR_NAME).toString());
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assert copy.getExecutor() == null;
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}
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@Test(timeout = 10000)
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public void testCpWithThreads() {
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run(new MultiThreadedCp(5, DEFAULT_QUEUE_SIZE, numFiles), "-t", "5",
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new Path(dir, FROM_DIR_NAME).toString(),
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new Path(dir, TO_DIR_NAME).toString());
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}
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@Test(timeout = 10000)
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public void testCpWithThreadWrong() {
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run(new MultiThreadedCp(1, DEFAULT_QUEUE_SIZE, 0), "-t", "0",
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new Path(dir, FROM_DIR_NAME).toString(),
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new Path(dir, TO_DIR_NAME).toString());
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}
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@Test(timeout = 10000)
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public void testCpWithThreadsAndQueueSize() {
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int queueSize = 256;
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run(new MultiThreadedCp(5, queueSize, numFiles), "-t", "5", "-q",
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Integer.toString(queueSize),
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new Path(dir, FROM_DIR_NAME).toString(),
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new Path(dir, TO_DIR_NAME).toString());
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}
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@Test(timeout = 10000)
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public void testCpWithThreadsAndQueueSizeWrong() {
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int queueSize = 0;
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run(new MultiThreadedCp(5, DEFAULT_QUEUE_SIZE, numFiles), "-t", "5", "-q",
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Integer.toString(queueSize),
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new Path(dir, FROM_DIR_NAME).toString(),
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new Path(dir, TO_DIR_NAME).toString());
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}
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@Test(timeout = 10000)
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public void testCpSingleFile() throws Exception {
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Path fromDirPath = new Path(dir, FROM_DIR_NAME);
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Path subFile = new Path(fromDirPath, "file0");
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fs.createNewFile(subFile);
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FSDataOutputStream output = fs.create(subFile, true);
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for (int i = 0; i < 100; ++i) {
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output.writeInt(i);
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output.writeChar('\n');
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}
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output.close();
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MultiThreadedCp copy = new MultiThreadedCp(5, DEFAULT_QUEUE_SIZE, 0);
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run(copy, "-t", "5", subFile.toString(),
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new Path(dir, TO_DIR_NAME).toString());
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assert copy.getExecutor() == null;
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}
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private static class MultiThreadedCp extends Cp {
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public static final String NAME = "multiThreadCp";
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private final int expectedThreads;
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private final int expectedQueuePoolSize;
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private final int expectedCompletedTaskCount;
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MultiThreadedCp(int expectedThreads, int expectedQueuePoolSize,
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int expectedCompletedTaskCount) {
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this.expectedThreads = expectedThreads;
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this.expectedQueuePoolSize = expectedQueuePoolSize;
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this.expectedCompletedTaskCount = expectedCompletedTaskCount;
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}
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@Override
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protected void processArguments(LinkedList<PathData> args)
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throws IOException {
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// Check if the number of threads are same as expected
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Assert.assertEquals(expectedThreads, getThreadCount());
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// Check if the queue pool size of executor is same as expected
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Assert.assertEquals(expectedQueuePoolSize, getThreadPoolQueueSize());
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super.processArguments(args);
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if (isMultiThreadNecessary(args)) {
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// Once the copy is complete, check following
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// 1) number of completed tasks are same as expected
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// 2) There are no active tasks in the executor
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// 3) Executor has shutdown correctly
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ThreadPoolExecutor executor = getExecutor();
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Assert.assertEquals(expectedCompletedTaskCount,
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executor.getCompletedTaskCount());
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Assert.assertEquals(0, executor.getActiveCount());
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Assert.assertTrue(executor.isTerminated());
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} else {
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assert getExecutor() == null;
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}
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}
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}
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}
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@ -324,7 +324,7 @@
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<comparators>
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<comparator>
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<type>RegexpComparator</type>
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<expected-output>^-cp \[-f\] \[-p \| -p\[topax\]\] \[-d\] <src> \.\.\. <dst> :\s*</expected-output>
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<expected-output>^-cp \[-f\] \[-p \| -p\[topax\]\] \[-d\] \[-t <thread count>\] \[-q <thread pool queue size>\] <src> \.\.\. <dst> :\s*</expected-output>
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</comparator>
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<comparator>
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<type>RegexpComparator</type>
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@ -332,43 +332,64 @@
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</comparator>
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<comparator>
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<type>RegexpComparator</type>
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<expected-output>^( |\t)*multiple files, the destination must be a directory.( )*Passing -p preserves status( )*</expected-output>
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<expected-output>^( |\t)*multiple files, the destination must be a directory.( )*</expected-output>
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</comparator>
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<comparator>
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<type>RegexpComparator</type>
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<expected-output>^( |\t)*\[topax\] \(timestamps, ownership, permission, ACLs, XAttr\). If -p is specified( )*</expected-output>
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<expected-output>^( |\t)*Flags :( )*</expected-output>
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</comparator>
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<comparator>
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<type>RegexpComparator</type>
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<expected-output>^( |\t)*with no <arg>, then preserves timestamps, ownership, permission. If -pa is( )*</expected-output>
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<expected-output>^( |\t)*-p\[topax\]\s+Preserve file attributes \[topx\] \(timestamps,( )*</expected-output>
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</comparator>
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<comparator>
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<type>RegexpComparator</type>
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<expected-output>^( |\t)*specified, then preserves permission also because ACL is a super-set of( )*</expected-output>
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<expected-output>^( |\t)*ownership, permission, ACL, XAttr\). If -p is( )*</expected-output>
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</comparator>
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<comparator>
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<type>RegexpComparator</type>
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<expected-output>^( |\t)*permission. Passing -f overwrites the destination if it already exists. raw( )*</expected-output>
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<expected-output>^( |\t)*specified with no arg, then preserves timestamps,( )*</expected-output>
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</comparator>
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<comparator>
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<type>RegexpComparator</type>
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<expected-output>^( |\t)*namespace extended attributes are preserved if \(1\) they are supported \(HDFS( )*</expected-output>
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<expected-output>^( |\t)*ownership, permission. If -pa is specified, then( )*</expected-output>
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</comparator>
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<comparator>
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<type>RegexpComparator</type>
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<expected-output>^( |\t)*only\) and, \(2\) all of the source and target pathnames are in the \/\.reserved\/raw( )*</expected-output>
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<expected-output>^( |\t)*preserves permission also because ACL is a( )*</expected-output>
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</comparator>
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<comparator>
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<type>RegexpComparator</type>
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<expected-output>^( |\t)*hierarchy. raw namespace xattr preservation is determined solely by the presence( )*</expected-output>
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<expected-output>^( |\t)*super-set of permission. Determination of whether( )*</expected-output>
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</comparator>
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<comparator>
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<type>RegexpComparator</type>
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<expected-output>^( |\t)*raw namespace extended attributes are preserved is( )*</expected-output>
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</comparator>
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<comparator>
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<type>RegexpComparator</type>
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<expected-output>^\s*\(or absence\) of the \/\.reserved\/raw prefix and not by the -p option\. Passing -d( )*</expected-output>
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<expected-output>^( |\t)*independent of the -p flag.( )*</expected-output>
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</comparator>
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<comparator>
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<type>RegexpComparator</type>
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<expected-output>^\s*will skip creation of temporary file\(<dst>\._COPYING_\)\.( )*</expected-output>
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<expected-output>^\s*-f\s+Overwrite the destination if it already exists.( )*</expected-output>
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</comparator>
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<comparator>
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<type>RegexpComparator</type>
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<expected-output>^\s*-d\s+Skip creation of temporary file\(<dst>\._COPYING_\).( )*</expected-output>
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</comparator>
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<comparator>
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<type>RegexpComparator</type>
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<expected-output>^\s*-t <thread count>\s+Number of threads to be used, default is 1.( )*</expected-output>
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</comparator>
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<comparator>
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<type>RegexpComparator</type>
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<expected-output>^\s*-q <thread pool queue size>\s+Thread pool queue size to be used, default is( )*</expected-output>
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</comparator>
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<comparator>
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<type>RegexpComparator</type>
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<expected-output>^( |\t)*1024.\s*</expected-output>
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</comparator>
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</comparators>
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</test>
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