本文整理汇总了Java中org.apache.hadoop.hdfs.DFSTestUtil.transferRbw方法的典型用法代码示例。如果您正苦于以下问题：Java DFSTestUtil.transferRbw方法的具体用法？Java DFSTestUtil.transferRbw怎么用？Java DFSTestUtil.transferRbw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.transferRbw方法的1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: testTransferRbw
import org.apache.hadoop.hdfs.DFSTestUtil; //导入方法依赖的package包/类
@Test
public void testTransferRbw() throws Exception {
final HdfsConfiguration conf = new HdfsConfiguration();
final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf
).numDataNodes(REPLICATION).build();
try {
cluster.waitActive();
final DistributedFileSystem fs = cluster.getFileSystem();
//create a file, write some data and leave it open.
final Path p = new Path("/foo");
final int size = (1 << 16) + RAN.nextInt(1 << 16);
LOG.info("size = " + size);
final FSDataOutputStream out = fs.create(p, REPLICATION);
final byte[] bytes = new byte[1024];
for(int remaining = size; remaining > 0; ) {
RAN.nextBytes(bytes);
final int len = bytes.length < remaining? bytes.length: remaining;
out.write(bytes, 0, len);
out.hflush();
remaining -= len;
}
//get the RBW
final ReplicaBeingWritten oldrbw;
final DataNode newnode;
final DatanodeInfo newnodeinfo;
final String bpid = cluster.getNamesystem().getBlockPoolId();
{
final DataNode oldnode = cluster.getDataNodes().get(0);
oldrbw = getRbw(oldnode, bpid);
LOG.info("oldrbw = " + oldrbw);
//add a datanode
cluster.startDataNodes(conf, 1, true, null, null);
newnode = cluster.getDataNodes().get(REPLICATION);
final DatanodeInfo oldnodeinfo;
{
final DatanodeInfo[] datatnodeinfos = cluster.getNameNodeRpc(
).getDatanodeReport(DatanodeReportType.LIVE);
Assert.assertEquals(2, datatnodeinfos.length);
int i = 0;
for(DatanodeRegistration dnReg = newnode.getDNRegistrationForBP(bpid);
i < datatnodeinfos.length && !datatnodeinfos[i].equals(dnReg); i++);
Assert.assertTrue(i < datatnodeinfos.length);
newnodeinfo = datatnodeinfos[i];
oldnodeinfo = datatnodeinfos[1 - i];
}
//transfer RBW
final ExtendedBlock b = new ExtendedBlock(bpid, oldrbw.getBlockId(), oldrbw.getBytesAcked(),
oldrbw.getGenerationStamp());
final BlockOpResponseProto s = DFSTestUtil.transferRbw(
b, DFSClientAdapter.getDFSClient(fs), oldnodeinfo, newnodeinfo);
Assert.assertEquals(Status.SUCCESS, s.getStatus());
}
//check new rbw
final ReplicaBeingWritten newrbw = getRbw(newnode, bpid);
LOG.info("newrbw = " + newrbw);
Assert.assertEquals(oldrbw.getBlockId(), newrbw.getBlockId());
Assert.assertEquals(oldrbw.getGenerationStamp(), newrbw.getGenerationStamp());
Assert.assertEquals(oldrbw.getVisibleLength(), newrbw.getVisibleLength());
LOG.info("DONE");
} finally {
cluster.shutdown();
}
}