本文整理匯總了Java中org.apache.hadoop.fs.FSDataOutputStream.writeByte方法的典型用法代碼示例。如果您正苦於以下問題：Java FSDataOutputStream.writeByte方法的具體用法？Java FSDataOutputStream.writeByte怎麽用？Java FSDataOutputStream.writeByte使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類org.apache.hadoop.fs.FSDataOutputStream的用法示例。
在下文中一共展示了FSDataOutputStream.writeByte方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: testQuotaUpdatedWhenBlockAbandoned
import org.apache.hadoop.fs.FSDataOutputStream; //導入方法依賴的package包/類
@Test
/** Make sure that the quota is decremented correctly when a block is abandoned */
public void testQuotaUpdatedWhenBlockAbandoned() throws IOException {
// Setting diskspace quota to 3MB
fs.setQuota(new Path("/"), HdfsConstants.QUOTA_DONT_SET, 3 * 1024 * 1024);
// Start writing a file with 2 replicas to ensure each datanode has one.
// Block Size is 1MB.
String src = FILE_NAME_PREFIX + "test_quota1";
FSDataOutputStream fout = fs.create(new Path(src), true, 4096, (short)2, 1024 * 1024);
for (int i = 0; i < 1024; i++) {
fout.writeByte(123);
}
// Shutdown one datanode, causing the block abandonment.
cluster.getDataNodes().get(0).shutdown();
// Close the file, new block will be allocated with 2MB pending size.
try {
fout.close();
} catch (QuotaExceededException e) {
fail("Unexpected quota exception when closing fout");
}
}
示例2: testAppendFileAfterRenameInSnapshot
import org.apache.hadoop.fs.FSDataOutputStream; //導入方法依賴的package包/類
/**
* Similar with testRenameUCFileInSnapshot, but do renaming first and then
* append file without closing it. Unit test for HDFS-5425.
*/
@Test
public void testAppendFileAfterRenameInSnapshot() throws Exception {
final Path test = new Path("/test");
final Path foo = new Path(test, "foo");
final Path bar = new Path(foo, "bar");
DFSTestUtil.createFile(hdfs, bar, BLOCKSIZE, REPL, SEED);
SnapshotTestHelper.createSnapshot(hdfs, test, "s0");
// rename bar --> bar2
final Path bar2 = new Path(foo, "bar2");
hdfs.rename(bar, bar2);
// append file and keep it as underconstruction.
FSDataOutputStream out = hdfs.append(bar2);
out.writeByte(0);
((DFSOutputStream) out.getWrappedStream()).hsync(
EnumSet.of(SyncFlag.UPDATE_LENGTH));
// save namespace and restart
restartClusterAndCheckImage(true);
}
示例3: genFile
import org.apache.hadoop.fs.FSDataOutputStream; //導入方法依賴的package包/類
/** Create a file with the name <code>file</code> and
* a length of <code>fileSize</code>. The file is filled with character 'a'.
*/
private void genFile(Path file, long fileSize) throws IOException {
FSDataOutputStream out = fc.create(file,
EnumSet.of(CreateFlag.CREATE, CreateFlag.OVERWRITE),
CreateOpts.createParent(), CreateOpts.bufferSize(4096),
CreateOpts.repFac((short) 3));
for(long i=0; i<fileSize; i++) {
out.writeByte('a');
}
out.close();
}