Java DistributedFileSystem.getConf方法代码示例

import org.apache.hadoop.hdfs.DistributedFileSystem; //导入方法依赖的package包/类
/**
 * Dumps DFS data structures into specified file.
 * Usage: hdfs dfsadmin -metasave filename
 * @param argv List of of command line parameters.
 * @param idx The index of the command that is being processed.
 * @exception IOException if an error occurred while accessing
 *            the file or path.
 */
public int metaSave(String[] argv, int idx) throws IOException {
  String pathname = argv[idx];
  DistributedFileSystem dfs = getDFS();
  Configuration dfsConf = dfs.getConf();
  URI dfsUri = dfs.getUri();
  boolean isHaEnabled = HAUtil.isLogicalUri(dfsConf, dfsUri);

  if (isHaEnabled) {
    String nsId = dfsUri.getHost();
    List<ProxyAndInfo<ClientProtocol>> proxies =
        HAUtil.getProxiesForAllNameNodesInNameservice(dfsConf,
        nsId, ClientProtocol.class);
    for (ProxyAndInfo<ClientProtocol> proxy : proxies) {
      proxy.getProxy().metaSave(pathname);
      System.out.println("Created metasave file " + pathname + " in the log "
          + "directory of namenode " + proxy.getAddress());
    }
  } else {
    dfs.metaSave(pathname);
    System.out.println("Created metasave file " + pathname + " in the log " +
        "directory of namenode " + dfs.getUri());
  }
  return 0;
}
 

import org.apache.hadoop.hdfs.DistributedFileSystem; //导入方法依赖的package包/类
/**
 * Command to ask the namenode to save the namespace.
 * Usage: hdfs dfsadmin -saveNamespace
 * @exception IOException 
 * @see org.apache.hadoop.hdfs.protocol.ClientProtocol#saveNamespace()
 */
public int saveNamespace() throws IOException {
  int exitCode = -1;

  DistributedFileSystem dfs = getDFS();
  Configuration dfsConf = dfs.getConf();
  URI dfsUri = dfs.getUri();
  boolean isHaEnabled = HAUtil.isLogicalUri(dfsConf, dfsUri);

  if (isHaEnabled) {
    String nsId = dfsUri.getHost();
    List<ProxyAndInfo<ClientProtocol>> proxies =
        HAUtil.getProxiesForAllNameNodesInNameservice(dfsConf,
        nsId, ClientProtocol.class);
    for (ProxyAndInfo<ClientProtocol> proxy : proxies) {
      proxy.getProxy().saveNamespace();
      System.out.println("Save namespace successful for " +
          proxy.getAddress());
    }
  } else {
    dfs.saveNamespace();
    System.out.println("Save namespace successful");
  }
  exitCode = 0;
 
  return exitCode;
}
 

import org.apache.hadoop.hdfs.DistributedFileSystem; //导入方法依赖的package包/类
/**
 * Command to ask the namenode to reread the hosts and excluded hosts 
 * file.
 * Usage: hdfs dfsadmin -refreshNodes
 * @exception IOException 
 */
public int refreshNodes() throws IOException {
  int exitCode = -1;

  DistributedFileSystem dfs = getDFS();
  Configuration dfsConf = dfs.getConf();
  URI dfsUri = dfs.getUri();
  boolean isHaEnabled = HAUtil.isLogicalUri(dfsConf, dfsUri);

  if (isHaEnabled) {
    String nsId = dfsUri.getHost();
    List<ProxyAndInfo<ClientProtocol>> proxies =
        HAUtil.getProxiesForAllNameNodesInNameservice(dfsConf,
        nsId, ClientProtocol.class);
    for (ProxyAndInfo<ClientProtocol> proxy: proxies) {
      proxy.getProxy().refreshNodes();
      System.out.println("Refresh nodes successful for " +
          proxy.getAddress());
    }
  } else {
    dfs.refreshNodes();
    System.out.println("Refresh nodes successful");
  }
  exitCode = 0;
 
  return exitCode;
}
 

import org.apache.hadoop.hdfs.DistributedFileSystem; //导入方法依赖的package包/类
/**
 * Command to ask the namenode to finalize previously performed upgrade.
 * Usage: hdfs dfsadmin -finalizeUpgrade
 * @exception IOException 
 */
public int finalizeUpgrade() throws IOException {
  DistributedFileSystem dfs = getDFS();
  
  Configuration dfsConf = dfs.getConf();
  URI dfsUri = dfs.getUri();
  boolean isHaAndLogicalUri = HAUtil.isLogicalUri(dfsConf, dfsUri);
  if (isHaAndLogicalUri) {
    // In the case of HA and logical URI, run finalizeUpgrade for all
    // NNs in this nameservice.
    String nsId = dfsUri.getHost();
    List<ClientProtocol> namenodes =
        HAUtil.getProxiesForAllNameNodesInNameservice(dfsConf, nsId);
    if (!HAUtil.isAtLeastOneActive(namenodes)) {
      throw new IOException("Cannot finalize with no NameNode active");
    }

    List<ProxyAndInfo<ClientProtocol>> proxies =
        HAUtil.getProxiesForAllNameNodesInNameservice(dfsConf,
        nsId, ClientProtocol.class);
    for (ProxyAndInfo<ClientProtocol> proxy : proxies) {
      proxy.getProxy().finalizeUpgrade();
      System.out.println("Finalize upgrade successful for " +
          proxy.getAddress());
    }
  } else {
    dfs.finalizeUpgrade();
    System.out.println("Finalize upgrade successful");
  }
  
  return 0;
}
 

import org.apache.hadoop.hdfs.DistributedFileSystem; //导入方法依赖的package包/类
/**
 * Command to ask the namenode to set the balancer bandwidth for all of the
 * datanodes.
 * Usage: hdfs dfsadmin -setBalancerBandwidth bandwidth
 * @param argv List of of command line parameters.
 * @param idx The index of the command that is being processed.
 * @exception IOException 
 */
public int setBalancerBandwidth(String[] argv, int idx) throws IOException {
  long bandwidth;
  int exitCode = -1;

  try {
    bandwidth = Long.parseLong(argv[idx]);
  } catch (NumberFormatException nfe) {
    System.err.println("NumberFormatException: " + nfe.getMessage());
    System.err.println("Usage: hdfs dfsadmin"
                + " [-setBalancerBandwidth <bandwidth in bytes per second>]");
    return exitCode;
  }

  FileSystem fs = getFS();
  if (!(fs instanceof DistributedFileSystem)) {
    System.err.println("FileSystem is " + fs.getUri());
    return exitCode;
  }

  DistributedFileSystem dfs = (DistributedFileSystem) fs;
  Configuration dfsConf = dfs.getConf();
  URI dfsUri = dfs.getUri();
  boolean isHaEnabled = HAUtil.isLogicalUri(dfsConf, dfsUri);

  if (isHaEnabled) {
    String nsId = dfsUri.getHost();
    List<ProxyAndInfo<ClientProtocol>> proxies =
        HAUtil.getProxiesForAllNameNodesInNameservice(dfsConf,
        nsId, ClientProtocol.class);
    for (ProxyAndInfo<ClientProtocol> proxy : proxies) {
      proxy.getProxy().setBalancerBandwidth(bandwidth);
      System.out.println("Balancer bandwidth is set to " + bandwidth +
          " for " + proxy.getAddress());
    }
  } else {
    dfs.setBalancerBandwidth(bandwidth);
    System.out.println("Balancer bandwidth is set to " + bandwidth);
  }
  exitCode = 0;

  return exitCode;
}