tajo-storage/tajo-storage-hdfs/src/test/java/org/apache/tajo/storage/TestFileTablespace.java - tajo - Git at Google

 /**
  * 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.tajo.storage;

 import com.google.common.base.Optional;
 import com.google.common.collect.Lists;
 import net.minidev.json.JSONObject;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hdfs.*;
 import org.apache.tajo.catalog.CatalogUtil;
 import org.apache.tajo.catalog.Schema;
 import org.apache.tajo.catalog.TableMeta;
 import org.apache.tajo.common.TajoDataTypes.Type;
 import org.apache.tajo.conf.TajoConf;
 import org.apache.tajo.datum.Datum;
 import org.apache.tajo.datum.DatumFactory;
 import org.apache.tajo.storage.fragment.FileFragment;
 import org.apache.tajo.storage.fragment.Fragment;
 import org.apache.tajo.util.CommonTestingUtil;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;

 import java.io.IOException;
 import java.net.URI;
 import java.util.List;
 import java.util.UUID;

 import static org.junit.Assert.*;

 public class TestFileTablespace {
 	private TajoConf conf;
 	private static String TEST_PATH = "target/test-data/TestFileTablespace";
   private Path testDir;
   private FileSystem localFs;

 	@Before
 	public void setUp() throws Exception {
 		conf = new TajoConf();
     testDir = CommonTestingUtil.getTestDir(TEST_PATH);
     localFs = testDir.getFileSystem(conf);
 	}

 	@After
 	public void tearDown() throws Exception {
 	}

   @Test
 	public final void testGetScannerAndAppender() throws IOException {
 		Schema schema = new Schema();
 		schema.addColumn("id", Type.INT4);
 		schema.addColumn("age",Type.INT4);
 		schema.addColumn("name",Type.TEXT);

 		TableMeta meta = CatalogUtil.newTableMeta("TEXT");

 		VTuple[] tuples = new VTuple[4];
 		for(int i=0; i < tuples.length; i++) {
 		  tuples[i] = new VTuple(new Datum[] {
           DatumFactory.createInt4(i),
 		      DatumFactory.createInt4(i + 32),
 		      DatumFactory.createText("name" + i)});
 		}

     Path path = StorageUtil.concatPath(testDir, "testGetScannerAndAppender", "table.csv");
     localFs.mkdirs(path.getParent());
     FileTablespace fileStorageManager = (FileTablespace) TablespaceManager.getLocalFs();
     assertEquals(localFs.getUri(), fileStorageManager.getFileSystem().getUri());

 		Appender appender = fileStorageManager.getAppender(meta, schema, path);
     appender.init();
 		for(Tuple t : tuples) {
 		  appender.addTuple(t);
 		}
 		appender.close();

 		Scanner scanner = fileStorageManager.getFileScanner(meta, schema, path);
     scanner.init();
 		int i=0;
 		while(scanner.next() != null) {
 			i++;
 		}
 		assertEquals(4,i);
 	}

   @Test(timeout = 60000)
   public void testGetSplit() throws Exception {
     final Configuration conf = new HdfsConfiguration();
     String testDataPath = TEST_PATH + "/" + UUID.randomUUID().toString();
     conf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR, testDataPath);
     conf.setLong(DFSConfigKeys.DFS_NAMENODE_MIN_BLOCK_SIZE_KEY, 0);
     conf.setInt(DFSConfigKeys.DFS_REPLICATION_KEY, 1);
     conf.setBoolean(DFSConfigKeys.DFS_HDFS_BLOCKS_METADATA_ENABLED, false);

     final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
         .numDataNodes(1).build();
     TajoConf tajoConf = new TajoConf(conf);
     tajoConf.setVar(TajoConf.ConfVars.ROOT_DIR, cluster.getFileSystem().getUri() + "/tajo");

     int testCount = 10;
     Path tablePath = new Path("/testGetSplit");
     try {
       DistributedFileSystem fs = cluster.getFileSystem();

       // Create test partitions
       List<Path> partitions = Lists.newArrayList();
       for (int i =0; i < testCount; i++){
         Path tmpFile = new Path(tablePath, String.valueOf(i));
         DFSTestUtil.createFile(fs, new Path(tmpFile, "tmpfile.dat"), 10, (short) 2, 0xDEADDEADl);
         partitions.add(tmpFile);
       }

       assertTrue(fs.exists(tablePath));
       FileTablespace space = new FileTablespace("testGetSplit", fs.getUri(), null);
       space.init(new TajoConf(conf));
       assertEquals(fs.getUri(), space.getUri());

       Schema schema = new Schema();
       schema.addColumn("id", Type.INT4);
       schema.addColumn("age",Type.INT4);
       schema.addColumn("name",Type.TEXT);
       TableMeta meta = CatalogUtil.newTableMeta("TEXT");

       List<Fragment> splits = Lists.newArrayList();
       // Get FileFragments in partition batch
       splits.addAll(space.getSplits("data", meta, schema, partitions.toArray(new Path[partitions.size()])));
       assertEquals(testCount, splits.size());
       // -1 is unknown volumeId
       assertEquals(-1, ((FileFragment)splits.get(0)).getDiskIds()[0]);

       splits.clear();
       splits.addAll(space.getSplits("data", meta, schema,
           partitions.subList(0, partitions.size() / 2).toArray(new Path[partitions.size() / 2])));
       assertEquals(testCount / 2, splits.size());
       assertEquals(1, splits.get(0).getHosts().length);
       assertEquals(-1, ((FileFragment)splits.get(0)).getDiskIds()[0]);
       fs.close();
     } finally {
       cluster.shutdown(true);
     }
   }

   @Test(timeout = 60000)
   public void testZeroLengthSplit() throws Exception {
     final Configuration conf = new HdfsConfiguration();
     String testDataPath = TEST_PATH + "/" + UUID.randomUUID().toString();
     conf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR, testDataPath);
     conf.setInt(DFSConfigKeys.DFS_REPLICATION_KEY, 1);
     conf.setLong(DFSConfigKeys.DFS_NAMENODE_MIN_BLOCK_SIZE_KEY, 0);

     final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
         .numDataNodes(1).build();
     TajoConf tajoConf = new TajoConf(conf);
     tajoConf.setVar(TajoConf.ConfVars.ROOT_DIR, cluster.getFileSystem().getUri() + "/tajo");

     int testCount = 10;
     Path tablePath = new Path("/testZeroLengthSplit");
     try {
       DistributedFileSystem fs = cluster.getFileSystem();

       // Create test partitions
       List<Path> partitions = Lists.newArrayList();
       for (int i =0; i < testCount; i++){
         Path tmpFile = new Path(tablePath, String.valueOf(i));

         //creates zero length file
         DFSTestUtil.createFile(fs, new Path(tmpFile, "tmpfile.dat"), 0, (short) 2, 0xDEADDEADl);
         partitions.add(tmpFile);
       }

       assertTrue(fs.exists(tablePath));
       FileTablespace space = new FileTablespace("testZeroLengthSplit", fs.getUri(), new JSONObject());
       space.init(new TajoConf(conf));
       assertEquals(fs.getUri(), space.getUri());

       Schema schema = new Schema();
       schema.addColumn("id", Type.INT4);
       schema.addColumn("age",Type.INT4);
       schema.addColumn("name",Type.TEXT);
       TableMeta meta = CatalogUtil.newTableMeta("TEXT");

       List<Fragment> splits = Lists.newArrayList();
       // Get FileFragments in partition batch
       splits.addAll(space.getSplits("data", meta, schema, partitions.toArray(new Path[partitions.size()])));
       assertEquals(0, splits.size());
       fs.close();
     } finally {
       cluster.shutdown(true);
     }
   }

   @Test(timeout = 60000)
   public void testGetSplitWithBlockStorageLocationsBatching() throws Exception {
     final Configuration conf = new HdfsConfiguration();
     String testDataPath = TEST_PATH + "/" + UUID.randomUUID().toString();
     conf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR, testDataPath);
     conf.setLong(DFSConfigKeys.DFS_NAMENODE_MIN_BLOCK_SIZE_KEY, 0);
     conf.setInt(DFSConfigKeys.DFS_REPLICATION_KEY, 2);
     conf.setBoolean(DFSConfigKeys.DFS_HDFS_BLOCKS_METADATA_ENABLED, true);

     final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
         .numDataNodes(2).build();

     TajoConf tajoConf = new TajoConf(conf);
     tajoConf.setVar(TajoConf.ConfVars.ROOT_DIR, cluster.getFileSystem().getUri() + "/tajo");

     int testCount = 10;
     Path tablePath = new Path("/testGetSplitWithBlockStorageLocationsBatching");
     try {
       DistributedFileSystem fs = cluster.getFileSystem();

       // Create test files
       for (int i = 0; i < testCount; i++) {
         Path tmpFile = new Path(tablePath, "tmpfile" + i + ".dat");
         DFSTestUtil.createFile(fs, tmpFile, 10, (short) 2, 0xDEADDEADl);
       }
       assertTrue(fs.exists(tablePath));

       FileTablespace sm = new FileTablespace("testGetSplitWithBlockStorageLocationsBatching", fs.getUri(), null);
       sm.init(new TajoConf(conf));

       assertEquals(fs.getUri(), sm.getUri());

       Schema schema = new Schema();
       schema.addColumn("id", Type.INT4);
       schema.addColumn("age", Type.INT4);
       schema.addColumn("name", Type.TEXT);
       TableMeta meta = CatalogUtil.newTableMeta("TEXT");

       List<Fragment> splits = Lists.newArrayList();
       splits.addAll(sm.getSplits("data", meta, schema, tablePath));

       assertEquals(testCount, splits.size());
       assertEquals(2, splits.get(0).getHosts().length);
       assertEquals(2, ((FileFragment)splits.get(0)).getDiskIds().length);
       assertNotEquals(-1, ((FileFragment)splits.get(0)).getDiskIds()[0]);
       fs.close();
     } finally {
       cluster.shutdown(true);
     }
   }

   @Test(timeout = 60000)
   public void testGetFileTablespace() throws Exception {
     final Configuration hdfsConf = new HdfsConfiguration();
     String testDataPath = TEST_PATH + "/" + UUID.randomUUID().toString();
     hdfsConf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR, testDataPath);
     hdfsConf.setLong(DFSConfigKeys.DFS_NAMENODE_MIN_BLOCK_SIZE_KEY, 0);
     hdfsConf.setInt(DFSConfigKeys.DFS_REPLICATION_KEY, 1);
     hdfsConf.setBoolean(DFSConfigKeys.DFS_HDFS_BLOCKS_METADATA_ENABLED, true);

     final MiniDFSCluster cluster =
         new MiniDFSCluster.Builder(hdfsConf).numDataNodes(1).build();
     URI uri = URI.create(cluster.getFileSystem().getUri() + "/tajo");

     Optional<Tablespace> existingTs = Optional.absent();
     try {
       /* Local FileSystem */
       FileTablespace space = TablespaceManager.getLocalFs();
       assertEquals(localFs.getUri(), space.getFileSystem().getUri());

       FileTablespace distTablespace = new FileTablespace("testGetFileTablespace", uri, null);
       distTablespace.init(conf);
       existingTs = TablespaceManager.addTableSpaceForTest(distTablespace);

       /* Distributed FileSystem */
       space = (FileTablespace) TablespaceManager.get(uri);
       assertEquals(cluster.getFileSystem().getUri(), space.getFileSystem().getUri());

       space = (FileTablespace) TablespaceManager.getByName("testGetFileTablespace");
       assertEquals(cluster.getFileSystem().getUri(), space.getFileSystem().getUri());
     } finally {
       cluster.shutdown(true);
     }
   }
 }
	/**
	* 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.tajo.storage;

	import com.google.common.base.Optional;
	import com.google.common.collect.Lists;
	import net.minidev.json.JSONObject;
	import org.apache.hadoop.conf.Configuration;
	import org.apache.hadoop.fs.FileSystem;
	import org.apache.hadoop.fs.Path;
	import org.apache.hadoop.hdfs.*;
	import org.apache.tajo.catalog.CatalogUtil;
	import org.apache.tajo.catalog.Schema;
	import org.apache.tajo.catalog.TableMeta;
	import org.apache.tajo.common.TajoDataTypes.Type;
	import org.apache.tajo.conf.TajoConf;
	import org.apache.tajo.datum.Datum;
	import org.apache.tajo.datum.DatumFactory;
	import org.apache.tajo.storage.fragment.FileFragment;
	import org.apache.tajo.storage.fragment.Fragment;
	import org.apache.tajo.util.CommonTestingUtil;
	import org.junit.After;
	import org.junit.Before;
	import org.junit.Test;

	import java.io.IOException;
	import java.net.URI;
	import java.util.List;
	import java.util.UUID;

	import static org.junit.Assert.*;

	public class TestFileTablespace {
	private TajoConf conf;
	private static String TEST_PATH = "target/test-data/TestFileTablespace";
	private Path testDir;
	private FileSystem localFs;

	@Before
	public void setUp() throws Exception {
	conf = new TajoConf();
	testDir = CommonTestingUtil.getTestDir(TEST_PATH);
	localFs = testDir.getFileSystem(conf);
	}

	@After
	public void tearDown() throws Exception {
	}

	@Test
	public final void testGetScannerAndAppender() throws IOException {
	Schema schema = new Schema();
	schema.addColumn("id", Type.INT4);
	schema.addColumn("age",Type.INT4);
	schema.addColumn("name",Type.TEXT);

	TableMeta meta = CatalogUtil.newTableMeta("TEXT");

	VTuple[] tuples = new VTuple[4];
	for(int i=0; i < tuples.length; i++) {
	tuples[i] = new VTuple(new Datum[] {
	DatumFactory.createInt4(i),
	DatumFactory.createInt4(i + 32),
	DatumFactory.createText("name" + i)});
	}

	Path path = StorageUtil.concatPath(testDir, "testGetScannerAndAppender", "table.csv");
	localFs.mkdirs(path.getParent());
	FileTablespace fileStorageManager = (FileTablespace) TablespaceManager.getLocalFs();
	assertEquals(localFs.getUri(), fileStorageManager.getFileSystem().getUri());

	Appender appender = fileStorageManager.getAppender(meta, schema, path);
	appender.init();
	for(Tuple t : tuples) {
	appender.addTuple(t);
	}
	appender.close();

	Scanner scanner = fileStorageManager.getFileScanner(meta, schema, path);
	scanner.init();
	int i=0;
	while(scanner.next() != null) {
	i++;
	}
	assertEquals(4,i);
	}

	@Test(timeout = 60000)
	public void testGetSplit() throws Exception {
	final Configuration conf = new HdfsConfiguration();
	String testDataPath = TEST_PATH + "/" + UUID.randomUUID().toString();
	conf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR, testDataPath);
	conf.setLong(DFSConfigKeys.DFS_NAMENODE_MIN_BLOCK_SIZE_KEY, 0);
	conf.setInt(DFSConfigKeys.DFS_REPLICATION_KEY, 1);
	conf.setBoolean(DFSConfigKeys.DFS_HDFS_BLOCKS_METADATA_ENABLED, false);

	final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
	.numDataNodes(1).build();
	TajoConf tajoConf = new TajoConf(conf);
	tajoConf.setVar(TajoConf.ConfVars.ROOT_DIR, cluster.getFileSystem().getUri() + "/tajo");

	int testCount = 10;
	Path tablePath = new Path("/testGetSplit");
	try {
	DistributedFileSystem fs = cluster.getFileSystem();

	// Create test partitions
	List<Path> partitions = Lists.newArrayList();
	for (int i =0; i < testCount; i++){
	Path tmpFile = new Path(tablePath, String.valueOf(i));
	DFSTestUtil.createFile(fs, new Path(tmpFile, "tmpfile.dat"), 10, (short) 2, 0xDEADDEADl);
	partitions.add(tmpFile);
	}

	assertTrue(fs.exists(tablePath));
	FileTablespace space = new FileTablespace("testGetSplit", fs.getUri(), null);
	space.init(new TajoConf(conf));
	assertEquals(fs.getUri(), space.getUri());

	Schema schema = new Schema();
	schema.addColumn("id", Type.INT4);
	schema.addColumn("age",Type.INT4);
	schema.addColumn("name",Type.TEXT);
	TableMeta meta = CatalogUtil.newTableMeta("TEXT");

	List<Fragment> splits = Lists.newArrayList();
	// Get FileFragments in partition batch
	splits.addAll(space.getSplits("data", meta, schema, partitions.toArray(new Path[partitions.size()])));
	assertEquals(testCount, splits.size());
	// -1 is unknown volumeId
	assertEquals(-1, ((FileFragment)splits.get(0)).getDiskIds()[0]);

	splits.clear();
	splits.addAll(space.getSplits("data", meta, schema,
	partitions.subList(0, partitions.size() / 2).toArray(new Path[partitions.size() / 2])));
	assertEquals(testCount / 2, splits.size());
	assertEquals(1, splits.get(0).getHosts().length);
	assertEquals(-1, ((FileFragment)splits.get(0)).getDiskIds()[0]);
	fs.close();
	} finally {
	cluster.shutdown(true);
	}
	}

	@Test(timeout = 60000)
	public void testZeroLengthSplit() throws Exception {
	final Configuration conf = new HdfsConfiguration();
	String testDataPath = TEST_PATH + "/" + UUID.randomUUID().toString();
	conf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR, testDataPath);
	conf.setInt(DFSConfigKeys.DFS_REPLICATION_KEY, 1);
	conf.setLong(DFSConfigKeys.DFS_NAMENODE_MIN_BLOCK_SIZE_KEY, 0);

	final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
	.numDataNodes(1).build();
	TajoConf tajoConf = new TajoConf(conf);
	tajoConf.setVar(TajoConf.ConfVars.ROOT_DIR, cluster.getFileSystem().getUri() + "/tajo");

	int testCount = 10;
	Path tablePath = new Path("/testZeroLengthSplit");
	try {
	DistributedFileSystem fs = cluster.getFileSystem();

	// Create test partitions
	List<Path> partitions = Lists.newArrayList();
	for (int i =0; i < testCount; i++){
	Path tmpFile = new Path(tablePath, String.valueOf(i));

	//creates zero length file
	DFSTestUtil.createFile(fs, new Path(tmpFile, "tmpfile.dat"), 0, (short) 2, 0xDEADDEADl);
	partitions.add(tmpFile);
	}

	assertTrue(fs.exists(tablePath));
	FileTablespace space = new FileTablespace("testZeroLengthSplit", fs.getUri(), new JSONObject());
	space.init(new TajoConf(conf));
	assertEquals(fs.getUri(), space.getUri());

	Schema schema = new Schema();
	schema.addColumn("id", Type.INT4);
	schema.addColumn("age",Type.INT4);
	schema.addColumn("name",Type.TEXT);
	TableMeta meta = CatalogUtil.newTableMeta("TEXT");

	List<Fragment> splits = Lists.newArrayList();
	// Get FileFragments in partition batch
	splits.addAll(space.getSplits("data", meta, schema, partitions.toArray(new Path[partitions.size()])));
	assertEquals(0, splits.size());
	fs.close();
	} finally {
	cluster.shutdown(true);
	}
	}

	@Test(timeout = 60000)
	public void testGetSplitWithBlockStorageLocationsBatching() throws Exception {
	final Configuration conf = new HdfsConfiguration();
	String testDataPath = TEST_PATH + "/" + UUID.randomUUID().toString();
	conf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR, testDataPath);
	conf.setLong(DFSConfigKeys.DFS_NAMENODE_MIN_BLOCK_SIZE_KEY, 0);
	conf.setInt(DFSConfigKeys.DFS_REPLICATION_KEY, 2);
	conf.setBoolean(DFSConfigKeys.DFS_HDFS_BLOCKS_METADATA_ENABLED, true);

	final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
	.numDataNodes(2).build();

	TajoConf tajoConf = new TajoConf(conf);
	tajoConf.setVar(TajoConf.ConfVars.ROOT_DIR, cluster.getFileSystem().getUri() + "/tajo");

	int testCount = 10;
	Path tablePath = new Path("/testGetSplitWithBlockStorageLocationsBatching");
	try {
	DistributedFileSystem fs = cluster.getFileSystem();

	// Create test files
	for (int i = 0; i < testCount; i++) {
	Path tmpFile = new Path(tablePath, "tmpfile" + i + ".dat");
	DFSTestUtil.createFile(fs, tmpFile, 10, (short) 2, 0xDEADDEADl);
	}
	assertTrue(fs.exists(tablePath));

	FileTablespace sm = new FileTablespace("testGetSplitWithBlockStorageLocationsBatching", fs.getUri(), null);
	sm.init(new TajoConf(conf));

	assertEquals(fs.getUri(), sm.getUri());

	Schema schema = new Schema();
	schema.addColumn("id", Type.INT4);
	schema.addColumn("age", Type.INT4);
	schema.addColumn("name", Type.TEXT);
	TableMeta meta = CatalogUtil.newTableMeta("TEXT");

	List<Fragment> splits = Lists.newArrayList();
	splits.addAll(sm.getSplits("data", meta, schema, tablePath));

	assertEquals(testCount, splits.size());
	assertEquals(2, splits.get(0).getHosts().length);
	assertEquals(2, ((FileFragment)splits.get(0)).getDiskIds().length);
	assertNotEquals(-1, ((FileFragment)splits.get(0)).getDiskIds()[0]);
	fs.close();
	} finally {
	cluster.shutdown(true);
	}
	}

	@Test(timeout = 60000)
	public void testGetFileTablespace() throws Exception {
	final Configuration hdfsConf = new HdfsConfiguration();
	String testDataPath = TEST_PATH + "/" + UUID.randomUUID().toString();
	hdfsConf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR, testDataPath);
	hdfsConf.setLong(DFSConfigKeys.DFS_NAMENODE_MIN_BLOCK_SIZE_KEY, 0);
	hdfsConf.setInt(DFSConfigKeys.DFS_REPLICATION_KEY, 1);
	hdfsConf.setBoolean(DFSConfigKeys.DFS_HDFS_BLOCKS_METADATA_ENABLED, true);

	final MiniDFSCluster cluster =
	new MiniDFSCluster.Builder(hdfsConf).numDataNodes(1).build();
	URI uri = URI.create(cluster.getFileSystem().getUri() + "/tajo");

	Optional<Tablespace> existingTs = Optional.absent();
	try {
	/* Local FileSystem */
	FileTablespace space = TablespaceManager.getLocalFs();
	assertEquals(localFs.getUri(), space.getFileSystem().getUri());

	FileTablespace distTablespace = new FileTablespace("testGetFileTablespace", uri, null);
	distTablespace.init(conf);
	existingTs = TablespaceManager.addTableSpaceForTest(distTablespace);

	/* Distributed FileSystem */
	space = (FileTablespace) TablespaceManager.get(uri);
	assertEquals(cluster.getFileSystem().getUri(), space.getFileSystem().getUri());

	space = (FileTablespace) TablespaceManager.getByName("testGetFileTablespace");
	assertEquals(cluster.getFileSystem().getUri(), space.getFileSystem().getUri());
	} finally {
	cluster.shutdown(true);
	}
	}
	}