How to use

getDfsUsed

method

in

org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.BlockPoolSlice

@VisibleForTesting
public long getDfsUsed() throws IOException {
 long dfsUsed = 0;
 for(BlockPoolSlice s : bpSlices.values()) {
  dfsUsed += s.getDfsUsed();
 }
 return dfsUsed;
}

long getBlockPoolUsed(String bpid) throws IOException {
 return getBlockPoolSlice(bpid).getDfsUsed();
}

/**
 * Write the current dfsUsed to the cache file.
 */
void saveDfsUsed() {
 File outFile = new File(currentDir, DU_CACHE_FILE);
 if (!fileIoProvider.deleteWithExistsCheck(volume, outFile)) {
  FsDatasetImpl.LOG.warn("Failed to delete old dfsUsed file in " +
   outFile.getParent());
 }
 try {
  long used = getDfsUsed();
  try (Writer out = new OutputStreamWriter(
    new FileOutputStream(outFile), "UTF-8")) {
   // mtime is written last, so that truncated writes won't be valid.
   out.write(Long.toString(used) + " " + Long.toString(timer.now()));
   // This is only called as part of the volume shutdown.
   // We explicitly avoid calling flush with fileIoProvider which triggers
   // volume check upon io exception to avoid cyclic volume checks.
   out.flush();
  }
 } catch (IOException ioe) {
  // If write failed, the volume might be bad. Since the cache file is
  // not critical, log the error and continue.
  FsDatasetImpl.LOG.warn("Failed to write dfsUsed to " + outFile, ioe);
 }
}

@VisibleForTesting
public long getDfsUsed() throws IOException {
 long dfsUsed = 0;
 synchronized(dataset) {
  for(BlockPoolSlice s : bpSlices.values()) {
   dfsUsed += s.getDfsUsed();
  }
 }
 return dfsUsed;
}

@VisibleForTesting
public long getDfsUsed() throws IOException {
 long dfsUsed = 0;
 synchronized(dataset) {
  for(BlockPoolSlice s : bpSlices.values()) {
   dfsUsed += s.getDfsUsed();
  }
 }
 return dfsUsed;
}

long getBlockPoolUsed(String bpid) throws IOException {
 return getBlockPoolSlice(bpid).getDfsUsed();
}

long getBlockPoolUsed(String bpid) throws IOException {
 return getBlockPoolSlice(bpid).getDfsUsed();
}

/**
 * Write the current dfsUsed to the cache file.
 */
void saveDfsUsed() {
 File outFile = new File(currentDir, DU_CACHE_FILE);
 if (outFile.exists() && !outFile.delete()) {
  FsDatasetImpl.LOG.warn("Failed to delete old dfsUsed file in " +
   outFile.getParent());
 }
 try {
  long used = getDfsUsed();
  try (Writer out = new OutputStreamWriter(
    new FileOutputStream(outFile), "UTF-8")) {
   // mtime is written last, so that truncated writes won't be valid.
   out.write(Long.toString(used) + " " + Long.toString(Time.now()));
   out.flush();
  }
 } catch (IOException ioe) {
  // If write failed, the volume might be bad. Since the cache file is
  // not critical, log the error and continue.
  FsDatasetImpl.LOG.warn("Failed to write dfsUsed to " + outFile, ioe);
 }
}

/**
 * Write the current dfsUsed to the cache file.
 */
void saveDfsUsed() {
 File outFile = new File(currentDir, DU_CACHE_FILE);
 if (outFile.exists() && !outFile.delete()) {
  FsDatasetImpl.LOG.warn("Failed to delete old dfsUsed file in " +
   outFile.getParent());
 }
 try {
  long used = getDfsUsed();
  try (Writer out = new OutputStreamWriter(
    new FileOutputStream(outFile), "UTF-8")) {
   // mtime is written last, so that truncated writes won't be valid.
   out.write(Long.toString(used) + " " + Long.toString(Time.now()));
   out.flush();
  }
 } catch (IOException ioe) {
  // If write failed, the volume might be bad. Since the cache file is
  // not critical, log the error and continue.
  FsDatasetImpl.LOG.warn("Failed to write dfsUsed to " + outFile, ioe);
 }
}