NameNode - aajisaka/hadoop-metrics GitHub Wiki

  • CreateFileOps
    • Total number of files created
  • FilesCreated
    • Total number of files/dirs created by create or mkdir operations
  • FilesAppended
    • Total number of files appended
  • GetBlockLocations
    • Total number of getBlockLocations operations
  • FilesRenamed
    • Total number of rename operations (NOT number of files/dirs renamed)
  • GetListingOps
    • Total number of directory listing operations
  • DeleteFileOps
    • Total number of delete operations
  • FilesDeleted
    • Total number of files/dirs deleted by delete or rename operations
  • FileInfoOps
    • Total number of getFileInfo/getLinkFileInfo operations
  • AddBlockOps
    • Total number of addBlock operations succeeded
  • GetAdditionalDatanodeOps
    • Total number of GetAdditionalDatenode operations
  • CreateSymlinkOps
    • Total number of createSymlink operations
  • GetLinkTargetOps
    • Total number of getLinkTarget operations
  • FilesInGetListingOps
    • Total number of files/dirs listed by directory listing operations
  • AllowSnapshotOps
    • Total number of allowSnapshot operations
  • DisallowSnapshotOps
    • Total number of disallowSnapshot operations
  • CreateSnapshotOps
    • Total number of createSnapshot operations
  • DeleteSnapshotOps
    • Total number of deleteSnapshot operations
  • RenameSnapshotOps
    • Total number of renameSnapshot operations
  • ListSnapshottableDirOps
    • Total number of snapshottableDirectoryStatus operations
  • SnapshotDiffreportOps
    • Total number of getSnapshotDiffReport operations
  • TransactionsNumOps
    • Total number of Journal transactions
  • TransactionsAvgTime
    • Average time of Journal transactions in milliseconds
  • SyncsNumOps
    • Total number of Journal syncs
  • SyncsAvgTime
    • Average time of Journal syncs in milliseconds
  • TransactionsBatchedInSync
    • Total number of Journal transactions batched in sync
  • BlockReportNumOps
    • Total number of processing block reports from DataNode
  • BlockReportAvgTime
    • Average time of processing block reports in milliseconds
  • SafeModeTime
    • The interval between FSNameSystem starts and the last time safemode leaves in milliseconds
  • FsImageLoadTime
    • Time loading FS Image at startup in milliseconds

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