How to use

getLiveDatanodeStorageReport

method

in

org.apache.hadoop.hdfs.server.balancer.NameNodeConnector

@Override
public DatanodeStorageReport[] getLiveDatanodeStorageReport()
  throws IOException {
 return nnc.getLiveDatanodeStorageReport();
}

/** Get live datanode storage reports and then build the network topology. */
public List<DatanodeStorageReport> init() throws IOException {
 final DatanodeStorageReport[] reports = nnc.getLiveDatanodeStorageReport();
 final List<DatanodeStorageReport> trimmed = new ArrayList<DatanodeStorageReport>(); 
 // create network topology and classify utilization collections:
 // over-utilized, above-average, below-average and under-utilized.
 for (DatanodeStorageReport r : DFSUtil.shuffle(reports)) {
  final DatanodeInfo datanode = r.getDatanodeInfo();
  if (shouldIgnore(datanode)) {
   continue;
  }
  trimmed.add(r);
  cluster.add(datanode);
 }
 return trimmed;
}

/**
 * getNodes function returns a list of DiskBalancerDataNodes.
 *
 * @return Array of DiskBalancerDataNodes
 */
@Override
public List<DiskBalancerDataNode> getNodes() throws Exception {
 Preconditions.checkNotNull(this.connector);
 List<DiskBalancerDataNode> nodeList = new LinkedList<>();
 DatanodeStorageReport[] reports = this.connector
   .getLiveDatanodeStorageReport();
 for (DatanodeStorageReport report : reports) {
  DiskBalancerDataNode datanode = getBalancerNodeFromDataNode(
    report.getDatanodeInfo());
  getVolumeInfoFromStorageReports(datanode, report.getStorageReports());
  nodeList.add(datanode);
 }
 return nodeList;
}

/** Get live datanode storage reports and then build the network topology. */
public List<DatanodeStorageReport> init() throws IOException {
 final DatanodeStorageReport[] reports = nnc.getLiveDatanodeStorageReport();
 final List<DatanodeStorageReport> trimmed = new ArrayList<DatanodeStorageReport>(); 
 // create network topology and classify utilization collections:
 // over-utilized, above-average, below-average and under-utilized.
 for (DatanodeStorageReport r : DFSUtil.shuffle(reports)) {
  final DatanodeInfo datanode = r.getDatanodeInfo();
  if (shouldIgnore(datanode)) {
   continue;
  }
  trimmed.add(r);
  cluster.add(datanode);
 }
 return trimmed;
}

/** Get live datanode storage reports and then build the network topology. */
public List<DatanodeStorageReport> init() throws IOException {
 final DatanodeStorageReport[] reports = nnc.getLiveDatanodeStorageReport();
 final List<DatanodeStorageReport> trimmed = new ArrayList<DatanodeStorageReport>(); 
 // create network topology and classify utilization collections:
 // over-utilized, above-average, below-average and under-utilized.
 for (DatanodeStorageReport r : DFSUtil.shuffle(reports)) {
  final DatanodeInfo datanode = r.getDatanodeInfo();
  if (shouldIgnore(datanode)) {
   continue;
  }
  trimmed.add(r);
  cluster.add(datanode);
 }
 return trimmed;
}