本文整理汇总了Java中org.apache.hadoop.hdfs.DFSTestUtil.calculateFileContentsFromSeed方法的典型用法代码示例。如果您正苦于以下问题：Java DFSTestUtil.calculateFileContentsFromSeed方法的具体用法？Java DFSTestUtil.calculateFileContentsFromSeed怎么用？Java DFSTestUtil.calculateFileContentsFromSeed使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.hadoop.hdfs.DFSTestUtil的用法示例。
在下文中一共展示了DFSTestUtil.calculateFileContentsFromSeed方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: verifyReadRandomFile
import org.apache.hadoop.hdfs.DFSTestUtil; //导入方法依赖的package包/类
protected final boolean verifyReadRandomFile(
Path path, int fileLength, int seed) throws IOException {
byte contents[] = DFSTestUtil.readFileBuffer(fs, path);
byte expected[] = DFSTestUtil.
calculateFileContentsFromSeed(seed, fileLength);
return Arrays.equals(contents, expected);
}
示例2: testWithLayoutChangeAndRollback
import org.apache.hadoop.hdfs.DFSTestUtil; //导入方法依赖的package包/类
/**
* Support for layout version change with rolling upgrade was
* added by HDFS-6800 and HDFS-6981.
*/
@Test(timeout=300000)
public void testWithLayoutChangeAndRollback() throws Exception {
final long seed = 0x600DF00D;
try {
startCluster();
Path[] paths = new Path[3];
File[] blockFiles = new File[3];
// Create two files in DFS.
for (int i = 0; i < 2; ++i) {
paths[i] = new Path("/" + GenericTestUtils.getMethodName() + "." + i + ".dat");
DFSTestUtil.createFile(fs, paths[i], BLOCK_SIZE, (short) 1, seed);
}
startRollingUpgrade();
// Delete the first file. The DN will save its block files in trash.
blockFiles[0] = getBlockForFile(paths[0], true);
File trashFile0 = getTrashFileForBlock(blockFiles[0], false);
deleteAndEnsureInTrash(paths[0], blockFiles[0], trashFile0);
// Restart the DN with a new layout version to trigger layout upgrade.
LOG.info("Shutting down the Datanode");
MiniDFSCluster.DataNodeProperties dnprop = cluster.stopDataNode(0);
DFSTestUtil.addDataNodeLayoutVersion(
DataNodeLayoutVersion.CURRENT_LAYOUT_VERSION - 1,
"Test Layout for TestDataNodeRollingUpgrade");
LOG.info("Restarting the DataNode");
cluster.restartDataNode(dnprop, true);
cluster.waitActive();
dn0 = cluster.getDataNodes().get(0);
LOG.info("The DN has been restarted");
assertFalse(trashFile0.exists());
assertFalse(dn0.getStorage().getBPStorage(blockPoolId).isTrashAllowed(blockFiles[0]));
// Ensure that the block file for the first file was moved from 'trash' to 'previous'.
assertTrue(isBlockFileInPrevious(blockFiles[0]));
assertFalse(isTrashRootPresent());
// Delete the second file. Ensure that its block file is in previous.
blockFiles[1] = getBlockForFile(paths[1], true);
fs.delete(paths[1], false);
assertTrue(isBlockFileInPrevious(blockFiles[1]));
assertFalse(isTrashRootPresent());
// Create and delete a third file. Its block file should not be
// in either trash or previous after deletion.
paths[2] = new Path("/" + GenericTestUtils.getMethodName() + ".2.dat");
DFSTestUtil.createFile(fs, paths[2], BLOCK_SIZE, (short) 1, seed);
blockFiles[2] = getBlockForFile(paths[2], true);
fs.delete(paths[2], false);
assertFalse(isBlockFileInPrevious(blockFiles[2]));
assertFalse(isTrashRootPresent());
// Rollback and ensure that the first two file contents were restored.
rollbackRollingUpgrade();
for (int i = 0; i < 2; ++i) {
byte[] actual = DFSTestUtil.readFileBuffer(fs, paths[i]);
byte[] calculated = DFSTestUtil.calculateFileContentsFromSeed(seed, BLOCK_SIZE);
assertArrayEquals(actual, calculated);
}
// And none of the block files must be in previous or trash.
assertFalse(isTrashRootPresent());
for (int i = 0; i < 3; ++i) {
assertFalse(isBlockFileInPrevious(blockFiles[i]));
}
} finally {
shutdownCluster();
}
}