本文整理汇总了Java中org.apache.hadoop.hdfs.ClientContext.getUseLegacyBlockReaderLocal方法的典型用法代码示例。如果您正苦于以下问题：Java ClientContext.getUseLegacyBlockReaderLocal方法的具体用法？Java ClientContext.getUseLegacyBlockReaderLocal怎么用？Java ClientContext.getUseLegacyBlockReaderLocal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.ClientContext的用法示例。
在下文中一共展示了ClientContext.getUseLegacyBlockReaderLocal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: doShortCircuitReadAfterEvictionTest
import org.apache.hadoop.hdfs.ClientContext; //导入方法依赖的package包/类
private void doShortCircuitReadAfterEvictionTest() throws IOException,
InterruptedException {
final String METHOD_NAME = GenericTestUtils.getMethodName();
Path path1 = new Path("/" + METHOD_NAME + ".01.dat");
Path path2 = new Path("/" + METHOD_NAME + ".02.dat");
final int SEED = 0xFADED;
makeRandomTestFile(path1, BLOCK_SIZE, true, SEED);
// Verify short-circuit read from RAM_DISK.
ensureFileReplicasOnStorageType(path1, RAM_DISK);
File metaFile = cluster.getBlockMetadataFile(0,
DFSTestUtil.getFirstBlock(fs, path1));
assertTrue(metaFile.length() <= BlockMetadataHeader.getHeaderSize());
assertTrue(verifyReadRandomFile(path1, BLOCK_SIZE, SEED));
// Sleep for a short time to allow the lazy writer thread to do its job.
Thread.sleep(3 * LAZY_WRITER_INTERVAL_SEC * 1000);
// Verify short-circuit read from RAM_DISK once again.
ensureFileReplicasOnStorageType(path1, RAM_DISK);
metaFile = cluster.getBlockMetadataFile(0,
DFSTestUtil.getFirstBlock(fs, path1));
assertTrue(metaFile.length() <= BlockMetadataHeader.getHeaderSize());
assertTrue(verifyReadRandomFile(path1, BLOCK_SIZE, SEED));
// Create another file with a replica on RAM_DISK, which evicts the first.
makeRandomTestFile(path2, BLOCK_SIZE, true, SEED);
Thread.sleep(3 * LAZY_WRITER_INTERVAL_SEC * 1000);
triggerBlockReport();
// Verify short-circuit read still works from DEFAULT storage. This time,
// we'll have a checksum written during lazy persistence.
ensureFileReplicasOnStorageType(path1, DEFAULT);
metaFile = cluster.getBlockMetadataFile(0,
DFSTestUtil.getFirstBlock(fs, path1));
assertTrue(metaFile.length() > BlockMetadataHeader.getHeaderSize());
assertTrue(verifyReadRandomFile(path1, BLOCK_SIZE, SEED));
// In the implementation of legacy short-circuit reads, any failure is
// trapped silently, reverts back to a remote read, and also disables all
// subsequent legacy short-circuit reads in the ClientContext. If the test
// uses legacy, then assert that it didn't get disabled.
ClientContext clientContext = client.getClientContext();
if (clientContext.getUseLegacyBlockReaderLocal()) {
Assert.assertFalse(clientContext.getDisableLegacyBlockReaderLocal());
}
}
示例2: doShortCircuitReadAfterEvictionTest
import org.apache.hadoop.hdfs.ClientContext; //导入方法依赖的package包/类
private void doShortCircuitReadAfterEvictionTest() throws IOException,
InterruptedException {
final String METHOD_NAME = GenericTestUtils.getMethodName();
Path path1 = new Path("/" + METHOD_NAME + ".01.dat");
Path path2 = new Path("/" + METHOD_NAME + ".02.dat");
final int SEED = 0xFADED;
makeRandomTestFile(path1, BLOCK_SIZE, true, SEED);
// Verify short-circuit read from RAM_DISK.
ensureFileReplicasOnStorageType(path1, RAM_DISK);
File metaFile = MiniDFSCluster.getBlockMetadataFile(0,
DFSTestUtil.getFirstBlock(fs, path1));
assertTrue(metaFile.length() <= BlockMetadataHeader.getHeaderSize());
assertTrue(verifyReadRandomFile(path1, BLOCK_SIZE, SEED));
// Sleep for a short time to allow the lazy writer thread to do its job.
Thread.sleep(3 * LAZY_WRITER_INTERVAL_SEC * 1000);
// Verify short-circuit read from RAM_DISK once again.
ensureFileReplicasOnStorageType(path1, RAM_DISK);
metaFile = MiniDFSCluster.getBlockMetadataFile(0,
DFSTestUtil.getFirstBlock(fs, path1));
assertTrue(metaFile.length() <= BlockMetadataHeader.getHeaderSize());
assertTrue(verifyReadRandomFile(path1, BLOCK_SIZE, SEED));
// Create another file with a replica on RAM_DISK, which evicts the first.
makeRandomTestFile(path2, BLOCK_SIZE, true, SEED);
Thread.sleep(3 * LAZY_WRITER_INTERVAL_SEC * 1000);
triggerBlockReport();
// Verify short-circuit read still works from DEFAULT storage. This time,
// we'll have a checksum written during lazy persistence.
ensureFileReplicasOnStorageType(path1, DEFAULT);
metaFile = MiniDFSCluster.getBlockMetadataFile(0,
DFSTestUtil.getFirstBlock(fs, path1));
assertTrue(metaFile.length() > BlockMetadataHeader.getHeaderSize());
assertTrue(verifyReadRandomFile(path1, BLOCK_SIZE, SEED));
// In the implementation of legacy short-circuit reads, any failure is
// trapped silently, reverts back to a remote read, and also disables all
// subsequent legacy short-circuit reads in the ClientContext. If the test
// uses legacy, then assert that it didn't get disabled.
ClientContext clientContext = client.getClientContext();
if (clientContext.getUseLegacyBlockReaderLocal()) {
Assert.assertFalse(clientContext.getDisableLegacyBlockReaderLocal());
}
}