Package org.apache.hadoop.hdfs.server.blockmanagement

Interface DatanodeStatistics

public interface DatanodeStatistics
Datanode statistics

  • Method Details

    • getCapacityTotal

      long getCapacityTotal()
      Returns:
      the total capacity

    • getCapacityUsed

      long getCapacityUsed()
      Returns:
      the used capacity

    • getCapacityUsedPercent

      float getCapacityUsedPercent()
      Returns:
      the percentage of the used capacity over the total capacity.

    • getCapacityRemaining

      long getCapacityRemaining()
      Returns:
      the remaining capacity

    • getCapacityRemainingPercent

      float getCapacityRemainingPercent()
      Returns:
      the percentage of the remaining capacity over the total capacity.

    • getBlockPoolUsed

      long getBlockPoolUsed()
      Returns:
      the block pool used.

    • getPercentBlockPoolUsed

      float getPercentBlockPoolUsed()
      Returns:
      the percentage of the block pool used space over the total capacity.

    • getCacheCapacity

      long getCacheCapacity()
      Returns:
      the total cache capacity of all DataNodes

    • getCacheUsed

      long getCacheUsed()
      Returns:
      the total cache used by all DataNodes

    • getXceiverCount

      int getXceiverCount()
      Returns:
      the xceiver count

    • getInServiceXceiverCount

      int getInServiceXceiverCount()
      Returns:
      average xceiver count for non-decommission(ing|ed) nodes

    • getNumDatanodesInService

      int getNumDatanodesInService()
      Returns:
      number of non-decommission(ing|ed) nodes

    • getInServiceAvailableVolumeCount

      int getInServiceAvailableVolumeCount()
      Returns:
      average xceiver count for writable volumes.

    • getCapacityUsedNonDFS

      long getCapacityUsedNonDFS()
      Returns:
      the total used space by data nodes for non-DFS purposes such as storing temporary files on the local file system

    • getStats

      long[] getStats()
      The same as ClientProtocol.getStats(). The block related entries are set to -1.

    • getExpiredHeartbeats

      int getExpiredHeartbeats()
      Returns:
      the expired heartbeats

    • getStorageTypeStats

      Map<org.apache.hadoop.fs.StorageType,StorageTypeStats> getStorageTypeStats()
      Returns:
      Storage Tier statistics

    • getProvidedCapacity

      long getProvidedCapacity()
      Returns:
      the provided capacity