Fsnamesystem - aajisaka/hadoop-metrics GitHub Wiki

  • MissingBlocks
    • Current number of missing blocks
  • ExpiredHeartbeats
    • Total number of expired heartbeats
  • TransactionsSinceLastCheckpoint
    • Total number of transactions since last checkpoint
  • TransactionsSinceLastLogRoll
    • Total number of transactions since last edit log roll
  • LastWrittenTransactionId
    • Last transaction ID written to the edit log
  • LastCheckpointTime
    • Time in milliseconds since epoch of last checkpoint
  • CapacityTotal
    • Current raw capacity of data nodes in bytes
  • CapacityTotalGB
    • Current raw capacity of data nodes in GB
  • CapacityUsed
    • Current used capacity across all data nodes in bytes
  • CapacityUsedGB
    • Current used capacity across all data nodes in GB
  • CapacityRemaining
    • Current remaining capacity in bytes
  • CapacityRemainingGB
    • Current remaining capacity in GB
  • CapacityUsedNonDFS
    • Current space used by data nodes for non DFS purposes in bytes
  • TotalLoad
    • Current number of connections
  • SnapshottableDirectories
    • Current number of snapshottable directories
  • Snapshots
    • Current number of snapshots
  • BlocksTotal
    • Current number of allocated blocks in the system
  • FilesTotal
    • Current number of files and directories
  • PendingReplicationBlocks
    • Current number of blocks pending to be replicated
  • UnderReplicatedBlocks
    • Current number of blocks under replicated
  • CorruptBlocks
    • Current number of corrupt replicas (see HDFS-5189)
  • ScheduledReplicationBlocks
    • Current number of blocks scheduled for replication
  • PendingDeletionBlocks
    • Current number of blocks pending delation
  • ExcessBlocks
    • Current number of excess blocks
  • PostponedMisreplicatedBlocks (HA-only)
    • Current number of blocks postponed to replicate
  • PendingDataNodeMessageCount (HA-only)
    • Current number of pending block-related messages for later processing in the standby node
  • MillisSinceLastLoadedEdits (HA-only)
    • Time in milliseconds since the last time standby namenode load edit log
    • In active namenode, set to 0
  • BlockCapacity
    • Current number of block capacity
  • StaleDataNodes
    • Current number of data nodes marked stale due to delayed heartbeat
  • TotalFiles
    • Current number of files and directories (same as FilesTotal)

For more details, see org.apache.hadoop.hdfs.server.namenode.FSNamesystem.java