Package org.apache.hadoop.hdfs.server.namenode.metrics

Interface FSNamesystemMBean

All Known Implementing Classes:
FSNamesystem
@Private public interface FSNamesystemMBean
This Interface defines the methods to get the status of a the FSNamesystem of a name node. It is also used for publishing via JMX (hence we follow the JMX naming convention.) Note we have not used the MetricsDynamicMBeanBase to implement this because the interface for the NameNodeStateMBean is stable and should be published as an interface.

Name Node runtime activity statistic info is reported in

See Also:

  • Method Details

    • getFSState

      String getFSState()
      The state of the file system: Safemode or Operational
      Returns:
      the state

    • getBlocksTotal

      long getBlocksTotal()
      Number of allocated blocks in the system
      Returns:
      - number of allocated blocks

    • getCapacityTotal

      long getCapacityTotal()
      Total storage capacity
      Returns:
      - total capacity in bytes

    • getCapacityRemaining

      long getCapacityRemaining()
      Free (unused) storage capacity
      Returns:
      - free capacity in bytes

    • getCapacityUsed

      long getCapacityUsed()
      Used storage capacity
      Returns:
      - used capacity in bytes

    • getProvidedCapacityTotal

      long getProvidedCapacityTotal()
      Total PROVIDED storage capacity.
      Returns:
      - total PROVIDED storage capacity in bytes

    • getFilesTotal

      long getFilesTotal()
      Total number of files and directories
      Returns:
      - num of files and directories

    • getPendingReplicationBlocks

      @Deprecated long getPendingReplicationBlocks()
      Deprecated.
      Use getPendingReconstructionBlocks() instead.
      Get aggregated count of all blocks pending to be reconstructed.

    • getPendingReconstructionBlocks

      long getPendingReconstructionBlocks()
      Get aggregated count of all blocks pending to be reconstructed.
      Returns:
      Number of blocks to be replicated.

    • getUnderReplicatedBlocks

      @Deprecated long getUnderReplicatedBlocks()
      Deprecated.
      Use getLowRedundancyBlocks() instead.
      Get aggregated count of all blocks with low redundancy.

    • getLowRedundancyBlocks

      long getLowRedundancyBlocks()
      Get aggregated count of all blocks with low redundancy.
      Returns:
      Number of blocks with low redundancy.

    • getScheduledReplicationBlocks

      long getScheduledReplicationBlocks()
      Blocks scheduled for replication
      Returns:
      - num of blocks scheduled for replication

    • getTotalLoad

      int getTotalLoad()
      Total Load on the FSNamesystem
      Returns:
      - total load of FSNamesystem

    • getNumLiveDataNodes

      int getNumLiveDataNodes()
      Number of Live data nodes
      Returns:
      number of live data nodes

    • getNumDeadDataNodes

      int getNumDeadDataNodes()
      Number of dead data nodes
      Returns:
      number of dead data nodes

    • getNumStaleDataNodes

      int getNumStaleDataNodes()
      Number of stale data nodes
      Returns:
      number of stale data nodes

    • getNumDecomLiveDataNodes

      int getNumDecomLiveDataNodes()
      Number of decommissioned Live data nodes
      Returns:
      number of decommissioned live data nodes

    • getNumDecomDeadDataNodes

      int getNumDecomDeadDataNodes()
      Number of decommissioned dead data nodes
      Returns:
      number of decommissioned dead data nodes

    • getNumInServiceLiveDataNodes

      int getNumInServiceLiveDataNodes()
      Returns:
      Number of in-service data nodes, where NumInServiceDataNodes = NumLiveDataNodes - NumDecomLiveDataNodes - NumInMaintenanceLiveDataNodes

    • getVolumeFailuresTotal

      int getVolumeFailuresTotal()
      Number of failed data volumes across all live data nodes.
      Returns:
      number of failed data volumes across all live data nodes

    • getEstimatedCapacityLostTotal

      long getEstimatedCapacityLostTotal()
      Returns an estimate of total capacity lost due to volume failures in bytes across all live data nodes.
      Returns:
      estimate of total capacity lost in bytes

    • getNumDecommissioningDataNodes

      int getNumDecommissioningDataNodes()
      Number of data nodes that are in the decommissioning state

    • getSnapshotStats

      String getSnapshotStats()
      The statistics of snapshots

    • getMaxObjects

      long getMaxObjects()
      Return the maximum number of inodes in the file system

    • getPendingDeletionBlocks

      long getPendingDeletionBlocks()
      Number of blocks pending deletion
      Returns:
      number of blocks pending deletion

    • getBlockDeletionStartTime

      long getBlockDeletionStartTime()
      Time when block deletions will begin
      Returns:
      time when block deletions will begin

    • getNumStaleStorages

      int getNumStaleStorages()
      Number of content stale storages.
      Returns:
      number of content stale storages

    • getTopUserOpCounts

      String getTopUserOpCounts()
      Returns a nested JSON object listing the top users for different RPC operations over tracked time windows.
      Returns:
      JSON string

    • getNumEncryptionZones

      int getNumEncryptionZones()
      Return the number of encryption zones in the system.

    • getFsLockQueueLength

      int getFsLockQueueLength()
      Returns the length of the wait Queue for the FSNameSystemLock. A larger number here indicates lots of threads are waiting for FSNameSystemLock.
      Returns:
      int - Number of Threads waiting to acquire FSNameSystemLock

    • getTotalSyncCount

      long getTotalSyncCount()
      Return total number of Sync Operations on FSEditLog.

    • getTotalSyncTimes

      String getTotalSyncTimes()
      Return total time spent doing sync operations on FSEditLog.

    • getNumInMaintenanceLiveDataNodes

      int getNumInMaintenanceLiveDataNodes()
      Returns:
      Number of IN_MAINTENANCE live data nodes

    • getNumInMaintenanceDeadDataNodes

      int getNumInMaintenanceDeadDataNodes()
      Returns:
      Number of IN_MAINTENANCE dead data nodes

    • getNumEnteringMaintenanceDataNodes

      int getNumEnteringMaintenanceDataNodes()
      Returns:
      Number of ENTERING_MAINTENANCE data nodes

    • getCurrentTokensCount

      long getCurrentTokensCount()
      Get the current number of delegation tokens in memory.
      Returns:
      number of DTs

    • getPendingSPSPaths

      int getPendingSPSPaths()
      Returns the number of paths to be processed by storage policy satisfier.
      Returns:
      The number of paths to be processed by sps.

    • getReconstructionQueuesInitProgress

      float getReconstructionQueuesInitProgress()
      Get the progress of the reconstruction queues initialisation.
      Returns:
      Returns values between 0 and 1 for the progress.