HADOOP-11812. Implement listLocatedStatus for ViewFileSystem to speed up split calculation (gera)

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -504,6 +504,9 @@ Release 2.8.0 - UNRELEASED
     HADOOP-11785. Reduce the number of listStatus operation in distcp
     buildListing (Zoran Dimitrijevic via Colin P. McCabe)
 
+    HADOOP-11812. Implement listLocatedStatus for ViewFileSystem to speed up
+    split calculation (gera)
+
   BUG FIXES
 
     HADOOP-10027. *Compressor_deflateBytesDirect passes instance instead of

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/LocatedFileStatus.java

@@ -32,6 +32,11 @@ import org.apache.hadoop.fs.permission.FsPermission;
 public class LocatedFileStatus extends FileStatus {
   private BlockLocation[] locations;
 
+
+  public LocatedFileStatus() {
+    super();
+  }
+
   /**
    * Constructor 
    * @param stat a file status
@@ -43,7 +48,7 @@ public class LocatedFileStatus extends FileStatus {
         stat.getBlockSize(), stat.getModificationTime(),
         stat.getAccessTime(), stat.getPermission(), stat.getOwner(),
         stat.getGroup(), null, stat.getPath(), locations);
-    if (isSymlink()) {
+    if (stat.isSymlink()) {
       setSymlink(stat.getSymlink());
     }
   }

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/viewfs/ChRootedFileSystem.java

@@ -37,8 +37,10 @@ import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.FilterFileSystem;
 import org.apache.hadoop.fs.FsServerDefaults;
 import org.apache.hadoop.fs.FsStatus;
+import org.apache.hadoop.fs.LocatedFileStatus;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.fs.XAttrSetFlag;
+import org.apache.hadoop.fs.RemoteIterator;
 import org.apache.hadoop.fs.permission.AclEntry;
 import org.apache.hadoop.fs.permission.AclStatus;
 import org.apache.hadoop.fs.permission.FsAction;
@@ -240,7 +242,13 @@ class ChRootedFileSystem extends FilterFileSystem {
       throws IOException {
     return super.listStatus(fullPath(f));
   }
-  
+
+  @Override
+  public RemoteIterator<LocatedFileStatus> listLocatedStatus(Path f)
+      throws IOException {
+    return super.listLocatedStatus(fullPath(f));
+  }
+
   @Override
   public boolean mkdirs(final Path f, final FsPermission permission)
       throws IOException {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/viewfs/InodeTree.java

@@ -362,7 +362,7 @@ abstract class InodeTree<T> {
       kind = k;
       targetFileSystem = targetFs;
       resolvedPath = resolveP;
-      remainingPath = remainingP;  
+      remainingPath = remainingP;
     }
     
     // isInternalDir of path resolution completed within the mount table 

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/viewfs/ViewFileSystem.java

@@ -45,7 +45,10 @@ import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.FsConstants;
 import org.apache.hadoop.fs.FsServerDefaults;
+import org.apache.hadoop.fs.LocatedFileStatus;
 import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.PathFilter;
+import org.apache.hadoop.fs.RemoteIterator;
 import org.apache.hadoop.fs.UnsupportedFileSystemException;
 import org.apache.hadoop.fs.XAttrSetFlag;
 import org.apache.hadoop.fs.permission.AclEntry;
@@ -115,8 +118,7 @@ public class ViewFileSystem extends FileSystem {
    */
   private String getUriPath(final Path p) {
     checkPath(p);
-    String s = makeAbsolute(p).toUri().getPath();
-    return s;
+    return makeAbsolute(p).toUri().getPath();
   }
   
   private Path makeAbsolute(final Path f) {
@@ -282,7 +284,7 @@ public class ViewFileSystem extends FileSystem {
     }
     assert(res.remainingPath != null);
     return res.targetFileSystem.createNonRecursive(res.remainingPath, permission,
-         flags, bufferSize, replication, blockSize, progress);
+        flags, bufferSize, replication, blockSize, progress);
   }
   
   @Override
@@ -297,7 +299,7 @@ public class ViewFileSystem extends FileSystem {
     }
     assert(res.remainingPath != null);
     return res.targetFileSystem.create(res.remainingPath, permission,
-         overwrite, bufferSize, replication, blockSize, progress);
+        overwrite, bufferSize, replication, blockSize, progress);
   }
 
   
@@ -328,7 +330,7 @@ public class ViewFileSystem extends FileSystem {
     final InodeTree.ResolveResult<FileSystem> res = 
       fsState.resolve(getUriPath(fs.getPath()), true);
     return res.targetFileSystem.getFileBlockLocations(
-          new ViewFsFileStatus(fs, res.remainingPath), start, len);
+        new ViewFsFileStatus(fs, res.remainingPath), start, len);
   }
 
   @Override
@@ -340,24 +342,42 @@ public class ViewFileSystem extends FileSystem {
     return res.targetFileSystem.getFileChecksum(res.remainingPath);
   }
 
+
+  private static FileStatus fixFileStatus(FileStatus orig,
+      Path qualified) throws IOException {
+    // FileStatus#getPath is a fully qualified path relative to the root of
+    // target file system.
+    // We need to change it to viewfs URI - relative to root of mount table.
+
+    // The implementors of RawLocalFileSystem were trying to be very smart.
+    // They implement FileStatus#getOwner lazily -- the object
+    // returned is really a RawLocalFileSystem that expect the
+    // FileStatus#getPath to be unchanged so that it can get owner when needed.
+    // Hence we need to interpose a new ViewFileSystemFileStatus that
+    // works around.
+    if ("file".equals(orig.getPath().toUri().getScheme())) {
+      orig = wrapLocalFileStatus(orig, qualified);
+    }
+
+    orig.setPath(qualified);
+    return orig;
+  }
+
+  private static FileStatus wrapLocalFileStatus(FileStatus orig,
+      Path qualified) {
+    return orig instanceof LocatedFileStatus
+        ? new ViewFsLocatedFileStatus((LocatedFileStatus)orig, qualified)
+        : new ViewFsFileStatus(orig, qualified);
+  }
+
+
   @Override
   public FileStatus getFileStatus(final Path f) throws AccessControlException,
       FileNotFoundException, IOException {
-    InodeTree.ResolveResult<FileSystem> res = 
+    InodeTree.ResolveResult<FileSystem> res =
       fsState.resolve(getUriPath(f), true);
-    
-    // FileStatus#getPath is a fully qualified path relative to the root of 
-    // target file system.
-    // We need to change it to viewfs URI - relative to root of mount table.
-    
-    // The implementors of RawLocalFileSystem were trying to be very smart.
-    // They implement FileStatus#getOwener lazily -- the object
-    // returned is really a RawLocalFileSystem that expect the
-    // FileStatus#getPath to be unchanged so that it can get owner when needed.
-    // Hence we need to interpose a new ViewFileSystemFileStatus that 
-    // works around.
     FileStatus status =  res.targetFileSystem.getFileStatus(res.remainingPath);
-    return new ViewFsFileStatus(status, this.makeQualified(f));
+    return fixFileStatus(status, this.makeQualified(f));
   }
   
   @Override
@@ -378,18 +398,50 @@ public class ViewFileSystem extends FileSystem {
     if (!res.isInternalDir()) {
       // We need to change the name in the FileStatus as described in
       // {@link #getFileStatus }
-      ChRootedFileSystem targetFs;
-      targetFs = (ChRootedFileSystem) res.targetFileSystem;
       int i = 0;
       for (FileStatus status : statusLst) {
-          String suffix = targetFs.stripOutRoot(status.getPath());
-          statusLst[i++] = new ViewFsFileStatus(status, this.makeQualified(
-              suffix.length() == 0 ? f : new Path(res.resolvedPath, suffix)));
+          statusLst[i++] = fixFileStatus(status,
+              getChrootedPath(res, status, f));
       }
     }
     return statusLst;
   }
 
+  @Override
+  public RemoteIterator<LocatedFileStatus>listLocatedStatus(final Path f,
+      final PathFilter filter) throws FileNotFoundException, IOException {
+    final InodeTree.ResolveResult<FileSystem> res = fsState
+        .resolve(getUriPath(f), true);
+    final RemoteIterator<LocatedFileStatus> statusIter = res.targetFileSystem
+        .listLocatedStatus(res.remainingPath);
+
+    if (res.isInternalDir()) {
+      return statusIter;
+    }
+
+    return new RemoteIterator<LocatedFileStatus>() {
+      @Override
+      public boolean hasNext() throws IOException {
+        return statusIter.hasNext();
+      }
+
+      @Override
+      public LocatedFileStatus next() throws IOException {
+        final LocatedFileStatus status = statusIter.next();
+        return (LocatedFileStatus)fixFileStatus(status,
+            getChrootedPath(res, status, f));
+      }
+    };
+  }
+
+  private Path getChrootedPath(InodeTree.ResolveResult<FileSystem> res,
+      FileStatus status, Path f) throws IOException {
+    final String suffix = ((ChRootedFileSystem)res.targetFileSystem)
+        .stripOutRoot(status.getPath());
+    return this.makeQualified(
+        suffix.length() == 0 ? f : new Path(res.resolvedPath, suffix));
+  }
+
   @Override
   public boolean mkdirs(final Path dir, final FsPermission permission)
       throws IOException {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/viewfs/ViewFsLocatedFileStatus.java

@@ -0,0 +1,136 @@
+/**
+ * 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.fs.viewfs;
+
+import org.apache.hadoop.fs.BlockLocation;
+import org.apache.hadoop.fs.LocatedFileStatus;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.permission.FsPermission;
+
+import java.io.IOException;
+
+class ViewFsLocatedFileStatus extends LocatedFileStatus {
+  final LocatedFileStatus myFs;
+  Path modifiedPath;
+
+  ViewFsLocatedFileStatus(LocatedFileStatus locatedFileStatus, Path path) {
+    myFs = locatedFileStatus;
+    modifiedPath = path;
+  }
+
+  @Override
+  public long getLen() {
+    return myFs.getLen();
+  }
+
+  @Override
+  public boolean isFile() {
+    return myFs.isFile();
+  }
+
+  @Override
+  public boolean isDirectory() {
+    return myFs.isDirectory();
+  }
+
+  @Override
+  @SuppressWarnings("deprecation")
+  public boolean isDir() {
+    return myFs.isDirectory();
+  }
+
+  @Override
+  public boolean isSymlink() {
+    return myFs.isSymlink();
+  }
+
+  @Override
+  public long getBlockSize() {
+    return myFs.getBlockSize();
+  }
+
+  @Override
+  public short getReplication() {
+    return myFs.getReplication();
+  }
+
+  @Override
+  public long getModificationTime() {
+    return myFs.getModificationTime();
+  }
+
+  @Override
+  public long getAccessTime() {
+    return myFs.getAccessTime();
+  }
+
+  @Override
+  public FsPermission getPermission() {
+    return myFs.getPermission();
+  }
+
+  @Override
+  public String getOwner() {
+    return myFs.getOwner();
+  }
+
+  @Override
+  public String getGroup() {
+    return myFs.getGroup();
+  }
+
+  @Override
+  public Path getPath() {
+    return modifiedPath;
+  }
+
+  @Override
+  public void setPath(final Path p) {
+    modifiedPath = p;
+  }
+
+  @Override
+  public Path getSymlink() throws IOException {
+    return myFs.getSymlink();
+  }
+
+  @Override
+  public void setSymlink(Path p) {
+    myFs.setSymlink(p);
+  }
+
+  @Override
+  public BlockLocation[] getBlockLocations() {
+    return myFs.getBlockLocations();
+  }
+
+  @Override
+  public int compareTo(Object o) {
+    return super.compareTo(o);
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    return super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return super.hashCode();
+  }
+}

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/viewfs/TestChRootedFileSystem.java

@@ -395,6 +395,20 @@ public class TestChRootedFileSystem {
     verify(mockFs).getAclStatus(rawPath);
   }
 
+  @Test
+  public void testListLocatedFileStatus() throws IOException {
+    final Path mockMount = new Path("mockfs://foo/user");
+    final Path mockPath = new Path("/usermock");
+    final Configuration conf = new Configuration();
+    conf.setClass("fs.mockfs.impl", MockFileSystem.class, FileSystem.class);
+    ConfigUtil.addLink(conf, mockPath.toString(), mockMount.toUri());
+    FileSystem vfs = FileSystem.get(URI.create("viewfs:///"), conf);
+    vfs.listLocatedStatus(mockPath);
+    final FileSystem mockFs = ((MockFileSystem)mockMount.getFileSystem(conf))
+        .getRawFileSystem();
+    verify(mockFs).listLocatedStatus(new Path(mockMount.toUri().getPath()));
+  }
+
   static class MockFileSystem extends FilterFileSystem {
     MockFileSystem() {
       super(mock(FileSystem.class));

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/viewfs/ViewFileSystemBaseTest.java

@@ -19,6 +19,7 @@ package org.apache.hadoop.fs.viewfs;
 
 import java.io.FileNotFoundException;
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.ArrayList;
 import java.util.List;
@@ -36,9 +37,11 @@ import static org.junit.Assert.assertFalse;
 
 import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.FsConstants;
+import org.apache.hadoop.fs.LocatedFileStatus;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.fs.permission.AclStatus;
 import org.apache.hadoop.fs.permission.AclUtil;
+import org.apache.hadoop.fs.RemoteIterator;
 import org.apache.hadoop.fs.permission.FsAction;
 import org.apache.hadoop.fs.permission.FsPermission;
 import org.apache.hadoop.fs.viewfs.ConfigUtil;
@@ -125,7 +128,7 @@ public class ViewFileSystemBaseTest {
   
   void setupMountPoints() {
     ConfigUtil.addLink(conf, "/targetRoot", targetTestRoot.toUri());
-    ConfigUtil.addLink(conf, "/user", new Path(targetTestRoot,"user").toUri());
+    ConfigUtil.addLink(conf, "/user", new Path(targetTestRoot, "user").toUri());
     ConfigUtil.addLink(conf, "/user2", new Path(targetTestRoot,"user").toUri());
     ConfigUtil.addLink(conf, "/data", new Path(targetTestRoot,"data").toUri());
     ConfigUtil.addLink(conf, "/internalDir/linkToDir2",
@@ -133,9 +136,9 @@ public class ViewFileSystemBaseTest {
     ConfigUtil.addLink(conf, "/internalDir/internalDir2/linkToDir3",
         new Path(targetTestRoot,"dir3").toUri());
     ConfigUtil.addLink(conf, "/danglingLink",
-        new Path(targetTestRoot,"missingTarget").toUri());
+        new Path(targetTestRoot, "missingTarget").toUri());
     ConfigUtil.addLink(conf, "/linkToAFile",
-        new Path(targetTestRoot,"aFile").toUri());
+        new Path(targetTestRoot, "aFile").toUri());
   }
   
   @Test
@@ -204,19 +207,28 @@ public class ViewFileSystemBaseTest {
         fsView.makeQualified(new Path("/foo/bar")));
   }
 
-  
-  /** 
-   * Test modify operations (create, mkdir, delete, etc) 
+  @Test
+  public void testLocatedOperationsThroughMountLinks() throws IOException {
+    testOperationsThroughMountLinksInternal(true);
+  }
+
+  @Test
+  public void testOperationsThroughMountLinks() throws IOException {
+    testOperationsThroughMountLinksInternal(false);
+  }
+
+  /**
+   * Test modify operations (create, mkdir, delete, etc)
    * on the mount file system where the pathname references through
    * the mount points.  Hence these operation will modify the target
    * file system.
-   * 
+   *
    * Verify the operation via mountfs (ie fSys) and *also* via the
    *  target file system (ie fSysLocal) that the mount link points-to.
    */
-  @Test
-  public void testOperationsThroughMountLinks() throws IOException {
-    // Create file 
+  private void testOperationsThroughMountLinksInternal(boolean located)
+      throws IOException {
+    // Create file
     fileSystemTestHelper.createFile(fsView, "/user/foo");
     Assert.assertTrue("Created file should be type file",
         fsView.isFile(new Path("/user/foo")));
@@ -329,7 +341,8 @@ public class ViewFileSystemBaseTest {
     fsView.mkdirs(new Path("/targetRoot/dirFoo"));
     Assert.assertTrue(fsView.exists(new Path("/targetRoot/dirFoo")));
     boolean dirFooPresent = false;
-    for (FileStatus fileStatus : fsView.listStatus(new Path("/targetRoot/"))) {
+    for (FileStatus fileStatus :
+        listStatusInternal(located, new Path("/targetRoot/"))) {
       if (fileStatus.getPath().getName().equals("dirFoo")) {
         dirFooPresent = true;
       }
@@ -394,9 +407,13 @@ public class ViewFileSystemBaseTest {
       i++;     
     } 
   }
-  
-  
-  
+
+  @Test
+  public void testLocatedListOnInternalDirsOfMountTable() throws IOException {
+    testListOnInternalDirsOfMountTableInternal(true);
+  }
+
+
   /**
    * Test "readOps" (e.g. list, listStatus) 
    * on internal dirs of mount table
@@ -406,15 +423,20 @@ public class ViewFileSystemBaseTest {
   // test list on internal dirs of mount table 
   @Test
   public void testListOnInternalDirsOfMountTable() throws IOException {
+    testListOnInternalDirsOfMountTableInternal(false);
+  }
+
+  private void testListOnInternalDirsOfMountTableInternal(boolean located)
+      throws IOException {
     
     // list on Slash
-    
-    FileStatus[] dirPaths = fsView.listStatus(new Path("/"));
+
+    FileStatus[] dirPaths = listStatusInternal(located, new Path("/"));
     FileStatus fs;
     verifyRootChildren(dirPaths);
 
     // list on internal dir
-    dirPaths = fsView.listStatus(new Path("/internalDir"));
+    dirPaths = listStatusInternal(located, new Path("/internalDir"));
     Assert.assertEquals(2, dirPaths.length);
 
     fs = fileSystemTestHelper.containsPath(fsView, "/internalDir/internalDir2", dirPaths);
@@ -452,13 +474,26 @@ public class ViewFileSystemBaseTest {
   
   @Test
   public void testListOnMountTargetDirs() throws IOException {
-    FileStatus[] dirPaths = fsView.listStatus(new Path("/data"));
+    testListOnMountTargetDirsInternal(false);
+  }
+
+  @Test
+  public void testLocatedListOnMountTargetDirs() throws IOException {
+    testListOnMountTargetDirsInternal(true);
+  }
+
+  private void testListOnMountTargetDirsInternal(boolean located)
+      throws IOException {
+    final Path dataPath = new Path("/data");
+
+    FileStatus[] dirPaths = listStatusInternal(located, dataPath);
+
     FileStatus fs;
     Assert.assertEquals(0, dirPaths.length);
     
     // add a file
     long len = fileSystemTestHelper.createFile(fsView, "/data/foo");
-    dirPaths = fsView.listStatus(new Path("/data"));
+    dirPaths = listStatusInternal(located, dataPath);
     Assert.assertEquals(1, dirPaths.length);
     fs = fileSystemTestHelper.containsPath(fsView, "/data/foo", dirPaths);
     Assert.assertNotNull(fs);
@@ -467,7 +502,7 @@ public class ViewFileSystemBaseTest {
     
     // add a dir
     fsView.mkdirs(fileSystemTestHelper.getTestRootPath(fsView, "/data/dirX"));
-    dirPaths = fsView.listStatus(new Path("/data"));
+    dirPaths = listStatusInternal(located, dataPath);
     Assert.assertEquals(2, dirPaths.length);
     fs = fileSystemTestHelper.containsPath(fsView, "/data/foo", dirPaths);
     Assert.assertNotNull(fs);
@@ -476,7 +511,23 @@ public class ViewFileSystemBaseTest {
     Assert.assertNotNull(fs);
     Assert.assertTrue("Created dir should appear as a dir", fs.isDirectory()); 
   }
-      
+
+  private FileStatus[] listStatusInternal(boolean located, Path dataPath) throws IOException {
+    FileStatus[] dirPaths = new FileStatus[0];
+    if (located) {
+      RemoteIterator<LocatedFileStatus> statIter =
+          fsView.listLocatedStatus(dataPath);
+      ArrayList<LocatedFileStatus> tmp = new ArrayList<LocatedFileStatus>(10);
+      while (statIter.hasNext()) {
+        tmp.add(statIter.next());
+      }
+      dirPaths = tmp.toArray(dirPaths);
+    } else {
+      dirPaths = fsView.listStatus(dataPath);
+    }
+    return dirPaths;
+  }
+
   @Test
   public void testFileStatusOnMountLink() throws IOException {
     Assert.assertTrue(fsView.getFileStatus(new Path("/")).isDirectory());
@@ -692,11 +743,21 @@ public class ViewFileSystemBaseTest {
     Assert.assertTrue("Created file should be type file",
         fsView.isFile(new Path("/user/foo")));
     Assert.assertTrue("Target of created file should be type file",
-        fsTarget.isFile(new Path(targetTestRoot,"user/foo")));
+        fsTarget.isFile(new Path(targetTestRoot, "user/foo")));
   }
 
   @Test
   public void testRootReadableExecutable() throws IOException {
+    testRootReadableExecutableInternal(false);
+  }
+
+  @Test
+  public void testLocatedRootReadableExecutable() throws IOException {
+    testRootReadableExecutableInternal(true);
+  }
+
+  private void testRootReadableExecutableInternal(boolean located)
+      throws IOException {
     // verify executable permission on root: cd /
     //
     Assert.assertFalse("In root before cd",
@@ -707,7 +768,8 @@ public class ViewFileSystemBaseTest {
 
     // verify readable
     //
-    verifyRootChildren(fsView.listStatus(fsView.getWorkingDirectory()));
+    verifyRootChildren(listStatusInternal(located,
+        fsView.getWorkingDirectory()));
 
     // verify permissions
     //