Java Code Examples for org.apache.hadoop.hdfs.TestFileCreation#writeFile()
The following examples show how to use
org.apache.hadoop.hdfs.TestFileCreation#writeFile() .
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Example 1
Source File: TestBlockUnderConstruction.java From hadoop with Apache License 2.0 | 6 votes |
void writeFile(Path file, FSDataOutputStream stm, int size) throws IOException { long blocksBefore = stm.getPos() / BLOCK_SIZE; TestFileCreation.writeFile(stm, BLOCK_SIZE); // need to make sure the full block is completely flushed to the DataNodes // (see FSOutputSummer#flush) stm.flush(); int blocksAfter = 0; // wait until the block is allocated by DataStreamer BlockLocation[] locatedBlocks; while(blocksAfter <= blocksBefore) { locatedBlocks = DFSClientAdapter.getDFSClient(hdfs).getBlockLocations( file.toString(), 0L, BLOCK_SIZE*NUM_BLOCKS); blocksAfter = locatedBlocks == null ? 0 : locatedBlocks.length; } }
Example 2
Source File: TestBlockUnderConstruction.java From big-c with Apache License 2.0 | 6 votes |
void writeFile(Path file, FSDataOutputStream stm, int size) throws IOException { long blocksBefore = stm.getPos() / BLOCK_SIZE; TestFileCreation.writeFile(stm, BLOCK_SIZE); // need to make sure the full block is completely flushed to the DataNodes // (see FSOutputSummer#flush) stm.flush(); int blocksAfter = 0; // wait until the block is allocated by DataStreamer BlockLocation[] locatedBlocks; while(blocksAfter <= blocksBefore) { locatedBlocks = DFSClientAdapter.getDFSClient(hdfs).getBlockLocations( file.toString(), 0L, BLOCK_SIZE*NUM_BLOCKS); blocksAfter = locatedBlocks == null ? 0 : locatedBlocks.length; } }
Example 3
Source File: TestAvatarDataNodeMultipleRegistrations.java From RDFS with Apache License 2.0 | 4 votes |
/** * Test that file data becomes available before file is closed. */ @Test public void testFileCreation() throws IOException, ConfigException, InterruptedException { Configuration conf = new Configuration(); if (simulatedStorage) { conf.setBoolean(SimulatedFSDataset.CONFIG_PROPERTY_SIMULATED, true); } MiniAvatarCluster cluster = new MiniAvatarCluster(conf, 1, true, null, null, 3, true); try { for (int i = 0; i < cluster.getNumNameNodes(); i++) { FileSystem fs = cluster.getFileSystem(i); // // check that / exists // Path path = new Path("/"); System.out.println("Path : \"" + path.toString() + "\""); System.out.println(fs.getFileStatus(path).isDir()); assertTrue("/ should be a directory", fs.getFileStatus(path).isDir() == true); // // Create a directory inside /, then try to overwrite it // Path dir1 = new Path("/test_dir"); fs.mkdirs(dir1); System.out.println("createFile: Creating " + dir1.getName() + " for overwrite of existing directory."); try { fs.create(dir1, true); // Create path, overwrite=true fs.close(); assertTrue("Did not prevent directory from being overwritten.", false); } catch (IOException ie) { if (!ie.getMessage().contains("already exists as a directory.")) throw ie; } // create a new file in home directory. Do not close it. // Path file1 = new Path("filestatus.dat"); FSDataOutputStream stm = TestFileCreation.createFile(fs, file1, 1); // verify that file exists in FS namespace assertTrue(file1 + " should be a file", fs.getFileStatus(file1).isDir() == false); System.out.println("Path : \"" + file1 + "\""); // write to file TestFileCreation.writeFile(stm); // Make sure a client can read it before it is closed. checkFile(fs, file1, 1); // verify that file size has changed long len = fs.getFileStatus(file1).getLen(); assertTrue(file1 + " should be of size " + (numBlocks * blockSize) + " but found to be of size " + len, len == numBlocks * blockSize); stm.close(); // verify that file size has changed to the full size len = fs.getFileStatus(file1).getLen(); assertTrue(file1 + " should be of size " + fileSize + " but found to be of size " + len, len == fileSize); // Check storage usage // can't check capacities for real storage since the OS file system may be changing under us. if (simulatedStorage) { AvatarDataNode dn = cluster.getDataNodes().get(0); int namespaceId = cluster.getNameNode(i).avatars.get(0).avatar.getNamespaceID(); assertEquals(fileSize, dn.getFSDataset().getNSUsed(namespaceId)); //Because all namespaces share the same simulated dataset assertEquals(SimulatedFSDataset.DEFAULT_CAPACITY-fileSize*(i+1), dn.getFSDataset().getRemaining()); } } } finally { cluster.shutDown(); } }