Java Code Examples for org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory#clearDirectory()

The following examples show how to use org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory#clearDirectory() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: NameSpaceSliceStorage.java    From RDFS with Apache License 2.0 6 votes vote down vote up 
/**
 * Format a namespace slice storage. 
 * @param sd the namespace storage
 * @param nsInfo the name space info
 * @throws IOException Signals that an I/O exception has occurred.
 */
private void format(StorageDirectory nsSdir, NamespaceInfo nsInfo) throws IOException {
  LOG.info("Formatting namespace " + namespaceID + " directory "
      + nsSdir.getCurrentDir());
  nsSdir.clearDirectory(); // create directory
  File rbwDir = new File(nsSdir.getCurrentDir(), STORAGE_DIR_RBW);
  File finalizedDir = new File(nsSdir.getCurrentDir(), STORAGE_DIR_FINALIZED);
  LOG.info("Creating Directories : " + rbwDir + ", " + finalizedDir);
  if (!rbwDir.mkdirs() || !finalizedDir.mkdirs()) {
    throw new IOException("Cannot create directories : " + rbwDir + ", "
        + finalizedDir);
  }
  this.layoutVersion = FSConstants.LAYOUT_VERSION;
  this.cTime = nsInfo.getCTime();
  this.namespaceID = nsInfo.getNamespaceID();
  this.storageType = NodeType.DATA_NODE;
  nsSdir.write();
}
Example 2
Source File: BackupImage.java    From hadoop with Apache License 2.0 5 votes vote down vote up 
/**
 * Analyze backup storage directories for consistency.<br>
 * Recover from incomplete checkpoints if required.<br>
 * Read VERSION and fstime files if exist.<br>
 * Do not load image or edits.
 *
 * @throws IOException if the node should shutdown.
 */
void recoverCreateRead() throws IOException {
  for (Iterator<StorageDirectory> it = storage.dirIterator(); it.hasNext();) {
    StorageDirectory sd = it.next();
    StorageState curState;
    try {
      curState = sd.analyzeStorage(HdfsServerConstants.StartupOption.REGULAR, storage);
      // sd is locked but not opened
      switch(curState) {
      case NON_EXISTENT:
        // fail if any of the configured storage dirs are inaccessible
        throw new InconsistentFSStateException(sd.getRoot(),
              "checkpoint directory does not exist or is not accessible.");
      case NOT_FORMATTED:
        // for backup node all directories may be unformatted initially
        LOG.info("Storage directory " + sd.getRoot() + " is not formatted.");
        LOG.info("Formatting ...");
        sd.clearDirectory(); // create empty current
        break;
      case NORMAL:
        break;
      default:  // recovery is possible
        sd.doRecover(curState);
      }
      if(curState != StorageState.NOT_FORMATTED) {
        // read and verify consistency with other directories
        storage.readProperties(sd);
      }
    } catch(IOException ioe) {
      sd.unlock();
      throw ioe;
    }
  }
}
Example 3
Source File: BackupImage.java    From big-c with Apache License 2.0 5 votes vote down vote up 
/**
 * Analyze backup storage directories for consistency.<br>
 * Recover from incomplete checkpoints if required.<br>
 * Read VERSION and fstime files if exist.<br>
 * Do not load image or edits.
 *
 * @throws IOException if the node should shutdown.
 */
void recoverCreateRead() throws IOException {
  for (Iterator<StorageDirectory> it = storage.dirIterator(); it.hasNext();) {
    StorageDirectory sd = it.next();
    StorageState curState;
    try {
      curState = sd.analyzeStorage(HdfsServerConstants.StartupOption.REGULAR, storage);
      // sd is locked but not opened
      switch(curState) {
      case NON_EXISTENT:
        // fail if any of the configured storage dirs are inaccessible
        throw new InconsistentFSStateException(sd.getRoot(),
              "checkpoint directory does not exist or is not accessible.");
      case NOT_FORMATTED:
        // for backup node all directories may be unformatted initially
        LOG.info("Storage directory " + sd.getRoot() + " is not formatted.");
        LOG.info("Formatting ...");
        sd.clearDirectory(); // create empty current
        break;
      case NORMAL:
        break;
      default:  // recovery is possible
        sd.doRecover(curState);
      }
      if(curState != StorageState.NOT_FORMATTED) {
        // read and verify consistency with other directories
        storage.readProperties(sd);
      }
    } catch(IOException ioe) {
      sd.unlock();
      throw ioe;
    }
  }
}
Example 4
Source File: SecondaryNameNode.java    From hadoop with Apache License 2.0 4 votes vote down vote up 
/**
 * Analyze checkpoint directories.
 * Create directories if they do not exist.
 * Recover from an unsuccessful checkpoint if necessary.
 *
 * @throws IOException
 */
void recoverCreate(boolean format) throws IOException {
  storage.attemptRestoreRemovedStorage();
  storage.unlockAll();

  for (Iterator<StorageDirectory> it = 
               storage.dirIterator(); it.hasNext();) {
    StorageDirectory sd = it.next();
    boolean isAccessible = true;
    try { // create directories if don't exist yet
      if(!sd.getRoot().mkdirs()) {
        // do nothing, directory is already created
      }
    } catch(SecurityException se) {
      isAccessible = false;
    }
    if(!isAccessible)
      throw new InconsistentFSStateException(sd.getRoot(),
          "cannot access checkpoint directory.");
    
    if (format) {
      // Don't confirm, since this is just the secondary namenode.
      LOG.info("Formatting storage directory " + sd);
      sd.clearDirectory();
    }
    
    StorageState curState;
    try {
      curState = sd.analyzeStorage(HdfsServerConstants.StartupOption.REGULAR, storage);
      // sd is locked but not opened
      switch(curState) {
      case NON_EXISTENT:
        // fail if any of the configured checkpoint dirs are inaccessible 
        throw new InconsistentFSStateException(sd.getRoot(),
              "checkpoint directory does not exist or is not accessible.");
      case NOT_FORMATTED:
        break;  // it's ok since initially there is no current and VERSION
      case NORMAL:
        // Read the VERSION file. This verifies that:
        // (a) the VERSION file for each of the directories is the same,
        // and (b) when we connect to a NN, we can verify that the remote
        // node matches the same namespace that we ran on previously.
        storage.readProperties(sd);
        break;
      default:  // recovery is possible
        sd.doRecover(curState);
      }
    } catch (IOException ioe) {
      sd.unlock();
      throw ioe;
    }
  }
}
Example 5
Source File: SecondaryNameNode.java    From big-c with Apache License 2.0 4 votes vote down vote up 
/**
 * Analyze checkpoint directories.
 * Create directories if they do not exist.
 * Recover from an unsuccessful checkpoint if necessary.
 *
 * @throws IOException
 */
void recoverCreate(boolean format) throws IOException {
  storage.attemptRestoreRemovedStorage();
  storage.unlockAll();

  for (Iterator<StorageDirectory> it = 
               storage.dirIterator(); it.hasNext();) {
    StorageDirectory sd = it.next();
    boolean isAccessible = true;
    try { // create directories if don't exist yet
      if(!sd.getRoot().mkdirs()) {
        // do nothing, directory is already created
      }
    } catch(SecurityException se) {
      isAccessible = false;
    }
    if(!isAccessible)
      throw new InconsistentFSStateException(sd.getRoot(),
          "cannot access checkpoint directory.");
    
    if (format) {
      // Don't confirm, since this is just the secondary namenode.
      LOG.info("Formatting storage directory " + sd);
      sd.clearDirectory();
    }
    
    StorageState curState;
    try {
      curState = sd.analyzeStorage(HdfsServerConstants.StartupOption.REGULAR, storage);
      // sd is locked but not opened
      switch(curState) {
      case NON_EXISTENT:
        // fail if any of the configured checkpoint dirs are inaccessible 
        throw new InconsistentFSStateException(sd.getRoot(),
              "checkpoint directory does not exist or is not accessible.");
      case NOT_FORMATTED:
        break;  // it's ok since initially there is no current and VERSION
      case NORMAL:
        // Read the VERSION file. This verifies that:
        // (a) the VERSION file for each of the directories is the same,
        // and (b) when we connect to a NN, we can verify that the remote
        // node matches the same namespace that we ran on previously.
        storage.readProperties(sd);
        break;
      default:  // recovery is possible
        sd.doRecover(curState);
      }
    } catch (IOException ioe) {
      sd.unlock();
      throw ioe;
    }
  }
}