本文整理汇总了Java中org.apache.hadoop.hdfs.server.namenode.BackupNode类的典型用法代码示例。如果您正苦于以下问题：Java BackupNode类的具体用法？Java BackupNode怎么用？Java BackupNode使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
BackupNode类属于org.apache.hadoop.hdfs.server.namenode包，在下文中一共展示了BackupNode类的4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: startBackupNode
import org.apache.hadoop.hdfs.server.namenode.BackupNode; //导入依赖的package包/类
/**
* Start the BackupNode
*/
public BackupNode startBackupNode(Configuration conf) throws IOException {
// Set up testing environment directories
hdfsDir = new File(TEST_DATA_DIR, "backupNode");
if ( hdfsDir.exists() && !FileUtil.fullyDelete(hdfsDir) ) {
throw new IOException("Could not delete hdfs directory '" + hdfsDir + "'");
}
File currDir = new File(hdfsDir, "name2");
File currDir2 = new File(currDir, "current");
File currDir3 = new File(currDir, "image");
assertTrue(currDir.mkdirs());
assertTrue(currDir2.mkdirs());
assertTrue(currDir3.mkdirs());
conf.set(DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY,
fileAsURI(new File(hdfsDir, "name2")).toString());
conf.set(DFSConfigKeys.DFS_NAMENODE_EDITS_DIR_KEY,
"${" + DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY + "}");
// Start BackupNode
String[] args = new String [] { StartupOption.BACKUP.getName() };
BackupNode bu = (BackupNode)NameNode.createNameNode(args, conf);
return bu;
}
示例2: canStartBackupNode
import org.apache.hadoop.hdfs.server.namenode.BackupNode; //导入依赖的package包/类
/**
* Check whether the BackupNode can be started.
*/
private boolean canStartBackupNode(Configuration conf) throws IOException {
BackupNode bn = null;
try {
bn = startBackupNode(conf);
} catch(IOException e) {
if (e instanceof java.net.BindException)
return false;
throw e;
} finally {
if(bn != null) bn.stop();
}
return true;
}
示例3: startBackupNode
import org.apache.hadoop.hdfs.server.namenode.BackupNode; //导入依赖的package包/类
/**
* Start the BackupNode
*/
public BackupNode startBackupNode(Configuration conf) throws IOException {
String dataDir = getTestingDir();
// Set up testing environment directories
hdfsDir = new File(dataDir, "backupNode");
if ( hdfsDir.exists() && !FileUtil.fullyDelete(hdfsDir) ) {
throw new IOException("Could not delete hdfs directory '" + hdfsDir + "'");
}
File currDir = new File(hdfsDir, "name2");
File currDir2 = new File(currDir, "current");
File currDir3 = new File(currDir, "image");
assertTrue(currDir.mkdirs());
assertTrue(currDir2.mkdirs());
assertTrue(currDir3.mkdirs());
conf.set(DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY,
fileAsURI(new File(hdfsDir, "name2")).toString());
conf.set(DFSConfigKeys.DFS_NAMENODE_EDITS_DIR_KEY, "${dfs.name.dir}");
// Start BackupNode
String[] args = new String [] { StartupOption.BACKUP.getName() };
BackupNode bu = (BackupNode)NameNode.createNameNode(args, conf);
return bu;
}
示例4: startBackupNode
import org.apache.hadoop.hdfs.server.namenode.BackupNode; //导入依赖的package包/类
/**
* Start the BackupNode
*/
public BackupNode startBackupNode(Configuration conf) throws IOException {
String dataDir = getTestingDir();
// Set up testing environment directories
hdfsDir = new File(dataDir, "backupNode");
if ( hdfsDir.exists() && !FileUtil.fullyDelete(hdfsDir) ) {
throw new IOException("Could not delete hdfs directory '" + hdfsDir + "'");
}
File currDir = new File(hdfsDir, "name2");
File currDir2 = new File(currDir, "current");
File currDir3 = new File(currDir, "image");
assertTrue(currDir.mkdirs());
assertTrue(currDir2.mkdirs());
assertTrue(currDir3.mkdirs());
conf.set(DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY,
fileAsURI(new File(hdfsDir, "name2")).toString());
conf.set(DFSConfigKeys.DFS_NAMENODE_EDITS_DIR_KEY,
"${" + DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY + "}");
// Start BackupNode
String[] args = new String [] { StartupOption.BACKUP.getName() };
BackupNode bu = (BackupNode)NameNode.createNameNode(args, conf);
return bu;
}