| Metric Name | Unit | Description |
|---|---|---|
| CapacityTotal | GB | Total cluster storage capacity |
| CapacityUsed | GB | Used cluster storage capacity |
| CapacityRemaining | GB | Remaining cluster storage capacity |
| CapacityUsedNonDFS | GB | Non-HDFS used cluster capacity |
| TotalLoad | - | Number of current connections |
| FilesTotal | - | Total number of files |
| BlocksTotal | - | Total number of blocks |
| PendingReplicationBlocks | - | Number of blocks waiting to be backed up |
| UnderReplicatedBlocks | - | Number of blocks with insufficient replicas |
| CorruptBlocks | - | Number of corrupted blocks |
| ScheduledReplicationBlocks | - | Number of blocks arranged for backup |
| PendingDeletionBlocks | - | Number of blocks waiting to be deleted |
| ExcessBlocks | - | Number of excessive blocks |
| PostponedMisreplicatedBlocks | - | Number of exceptional blocks postponed to be processed |
| BlockCapacity | - | Capacity of blocks |
| NumLiveDataNodes | - | Number of live data nodes |
| NumDeadDataNodes | - | Number of data nodes marked as dead |
| NumDecomLiveDataNodes | - | Number of decommissioned live nodes |
| NumDecomDeadDataNodes | - | Number of decommissioned dead nodes |
| NumDecommissioningDataNodes | - | Number of decommissioning nodes |
| NumStaleDataNodes | - | Number of current DataNodes marked as expired due to heartbeat delay |
| Snapshots | - | Number of snapshots |
| VolumeFailuresTotal | - | Total number of failures on all DataNodes |
| Metric Name | Unit | Description |
|---|---|---|
| ReceivedBytes | Bytes/s | Data receiving rate |
| SentBytes | Bytes/s | Data sending rate |
| RpcQueueTimeNumOps | Calls/s | RPC call rate |
| RpcQueueTimeAvgTime | ms | Average RPC delay |
| RpcAuthenticationFailures | - | Number of RPC authentication failures |
| RpcAuthenticationSuccesses | - | Number of RPC authentication successes |
| RpcAuthorizationFailures | - | Number of RPC authorization failures |
| RpcAuthorizationSuccesses | - | Number of RPC authorization successes |
| NumOpenConnections | - | Number of current connections |
| CallQueueLength | - | Length of current RPC processing queue |
| MemNonHeapUsedM | MB | Size of NonHeapMemory currently used by JVM |
| MemNonHeapCommittedM | MB | JVM memory |
| MemHeapUsedM | MB | Size of HeapMemory currently used by JVM |
| MemHeapCommittedM | MB | Submitted size of JVM HeapMemory |
| MemHeapMaxM | MB | Size of HeapMemory configured by JVM |
| MemMaxM | MB | Maximum memory size that can be used by JVM during runtime |
| BlockReportAvgTime | Blocks/s | Average delay for processing DataNode blocks per second |
| FGC | Operations/s | Full GC count |
| YGC | 2/s | Young GC count |
| YGCT | ms | Young GC time |
| FGCT | ms | Full GC time |
| GCT | ms | Garbage collection time |
| ThreadsNew | - | Number of threads in new state |
| ThreadsRunnable | - | Number of threads in runnable state |
| ThreadsBlocked | - | Number of threads in blocked state |
| ThreadsWaiting | - | Number of threads in WAITING state |
| ThreadsTimedWaiting | - | Number of threads in TIMED WAITING state |
| ThreadsTerminated | - | Number of threads in Terminated state |
| LogFatal | - | Number of Fatal logs |
| LogError | - | Number of Error logs |
| LogWarn | - | Number of Warn logs |
| LogInfo | - | Number of Info logs |
| S0 | % | Percentage of used Survivor 0 memory |
| S1 | % | Percentage of used Survivor 1 memory |
| E | % | Percentage of used Eden memory |
| O | % | Percentage of used Old memory |
| M | % | Percentage of used Metaspace memory |
| CCS | % | Percentage of memory used by compressed class space |
| NumStaleStorages | - | Number of current DataNodes marked as expired due to heartbeat delay |
| PendingDataNodeMessageCount | Requests/s | Number of DataNode requests queued on standby NameNode |
| NumberOfMissingBlocks | - | Number of missing blocks |
| NumberOfMissingBlocksWithReplicationFactorOne | - | Number of missing blocks (rf = 1) |
| AllowSnapshotOps | Operations/s | Number of AllowSnapshot operations executed per second |
| DisallowSnapshotOps | Operations/s | Number of DisallowSnapshot operations executed per second |
| CreateSnapshotOps | Operations/s | Number of CreateSnapshot operations executed per second |
| DeleteSnapshotOps | Operations/s | Number of DeleteSnapshot operations executed per second |
| ListSnapshottableDirOps | Operations/s | Number of ListSnapshottableDir operations executed per second |
| SnapshotDiffReportOps | Operations/s | Number of SnapshotDiffReportOps operations executed per second |
| RenameSnapshotOps | Operations/s | Number of RenameSnapshotOps operations executed per second |
| CreateFileOps | Operations/s | Number of CreateFile operations executed per second |
| GetListingOps | Operations/s | Number of GetListing operations executed per second |
| TotalFileOps | Operations/s | Number of TotalFileOps operations executed per second |
| DeleteFileOps | Operations/s | Number of DeleteFile operations executed per second |
| FileInfoOps | Operations/s | Number of FileInfo operations executed per second |
| GetAdditionalDatanodeOps | Operations/s | Number of GetAdditionalDatanode operations executed per second |
| CreateSymlinkOps | Operations/s | Number of CreateSymlink operations executed per second |
| GetLinkTargetOps | Operations/s | Number of GetLinkTarget operations executed per second |
| FilesInGetListingOps | Operations/s | Number of FilesInGetListing operations executed per second |
| TransactionsNumOps | Operations/s | Number of Journal transaction operations processed per second |
| TransactionsBatchedInSync | Operations/s | Number of Journal transaction operations processed in batches per second |
| GetEditNumOps | Operations/s | Number of GetEditNumOps operations executed per second |
| GetImageNumOps | Operations/s | Number of GetImageNumOps operations executed per second |
| PutImageNumOps | Operations/s | Number of PutImageNumOps operations executed per second |
| SyncsNumOps | Operations/s | Number of Journal syncs operations processed per second |
| BlockReceivedAndDeletedOps | Operations/s | Number of BlockReceivedAndDeletedOps operations executed per second |
| BlockOpsQueued | Operations/s | Delay in processing DataNode block reporting operations |
| CacheReportNumOps | Operations/s | Number of CacheReport operations processed per second |
| BlockReportNumQps | Operations/s | Number of DataNode block reporting operations processed per second |
| SyncsAvgTime | ms | Average delay in processing Journal syncs operations |
| CacheReportAvgTime | ms | Average time of cache reporting operation |
| GetEditAvgTime | ms | Average delay in reading Edit file |
| GetImageAvgTime | ms | Average delay reading image file |
| PutImageAvgTime | ms | Average delay in writing image file |
| TransactionsAvgTime | ms | Average delay in processing Journal transaction operations |
| StartTime | ms | Process start time |
| State | - | NN state |
| PeakThreadCount | - | Peak number of threads |
| ThreadCount | - | Number of threads |
| DaemonThreadCount | - | Number of background threads |
| Metric Name | Unit | Description |
|---|---|---|
| XceiverCount | - | Number of Xceivers |
| BytesWrittenMB | Bytes/s | DN byte write rate |
| BytesReadMB | Bytes/s | DN byte read rate |
| RemoteBytesReadMB | Bytes/s | Rate of bytes read by remote client |
| RemoteBytesWrittenMB | Bytes/s | Rate of bytes written by remote client |
| WritesFromRemoteClient | - | QPS of write operations from remote client |
| WritesFromLocalClient | - | OPS of write operations from local client |
| ReadsFromRemoteClient | - | QPS of read operations from remote client |
| ReadsFromLocalClient | - | QPS of read operations from local client |
| BlockVerificationFailures | Failures/s | Number of block check failures |
| VolumeFailures | Failures/s | Number of disk failures |
| DatanodeNetworkErrors | Errors/s | Total number of network errors |
| HeartbeatsAvgTime | ms | Average heartbeat API time |
| HeartbeatsNumOps | Queries/s | Heartbeat API QPS |
| SendDataPacketTransferNanosAvgTime | ms | Average data packet sending time |
| ReadBlockOpNumOps | Operations/s | OPS of block reads from DataNode |
| WriteBlockOpNumOps | Operations/s | OPS of block writes to DataNode |
| BlockChecksumOpNumOps | Operations/s | OPS of Checksum operations by DataNode |
| CopyBlockOpNumOps | Operations/s | OPS of block copying operations |
| ReplaceBlockOpNumOps | Operations/s | OPS of Replace Block operations |
| BlockReportsNumOps | Operations/s | OPS of block reporting operations |
| IncrementalBlockReportsNumOps | Reports/s | OPS of incremental block reporting |
| CacheReportsNumOps | Reports/s | OPS of cache reporting |
| PacketAckRoundTripTimeNanosNumOps | Operations/s | Number of ACK ROUND TRIP operations processed per second |
| FlushNanosNumOps | Operations/s | Number of Flush operations processed per second |
| ReadBlockOpAvgTime | ms | Average block read time |
| WriteBlockOpAvgTime | ms | Average block write operation time |
| BlockChecksumOpAvgTime | ms | Average block check time |
| CopyBlockOpAvgTime | ms | Average block copy time |
| ReplaceBlockOpAvgTime | ms | Average Replace Block operation time |
| BlockReportsAvgTime | ms | Average block reporting time |
| IncrementalBlockReportsAvgTime | ms | Average time of incremental block reporting |
| CacheReportsAvgTime | ms | Average time of cache reporting |
| PacketAckRoundTripTimeNanosAvgTime | ms | Average time of processing ACK ROUND TRIP |
| FlushNanosAvgTime | ms | Average Flush operation time |
| FsyncNanosAvgTime | ms | Average Fsync operation time |
| RamDiskBlocksWrite | Blocks/s | Total number of blocks written to memory |
| RamDiskBlocksWriteFallback | Blocks/s | Total number of blocks failed to be written to memory (failover to disk) |
| RamDiskBlocksDeletedBeforeLazyPersisted | Blocks/s | Total number of blocks deleted before application is saved to disk |
| RamDiskBlocksReadHits | Blocks/s | Number of reads from blocks in memory |
| RamDiskBlocksEvicted | Blocks/s | Total number of blocks cleared in memory |
| RamDiskBlocksEvictedWithoutRead | Blocks/s | Total number of blocks retrieved from memory |
| RamDiskBlocksLazyPersisted | Blocks/s | Number of disk writes by lazy writer |
| RamDiskBytesLazyPersisted | Bytes/s | Total number of blocks written by the lazy writer to a disk |
| RamDiskBytesWrite | Bytes/s | Total number of bytes written to memory |
| MemNonHeapUsedM | MB | Size of NonHeapMemory currently used by JVM |
| MemNonHeapCommittedM | MB | Size of NonHeapCommittedM configured by JVM |
| MemHeapUsedM | MB | Size of HeapMemory currently used by JVM |
| MemHeapCommittedM | MB | Submitted size of JVM HeapMemory |
| MemHeapMaxM | MB | Size of HeapMemory configured by JVM |
| MemMaxM | MB | Maximum memory size that can be used by JVM during runtime |
| ThreadsNew | - | Number of threads in new state |
| ThreadsRunnable | - | Number of threads in runnable state |
| ThreadsBlocked | - | Number of threads in blocked state |
| ThreadsWaiting | - | Number of threads in WAITING state |
| ThreadsTimedWaiting | - | Number of threads in TIMED WAITING state |
| ThreadsTerminated | - | Number of threads in Terminated state |
| LogFatal | - | Number of Fatal logs |
| LogError | - | Number of Error logs |
| LogWarn | - | Number of Warn logs |
| LogInfo | - | Number of Info logs |
| S0 | % | Percentage of used Survivor 0 memory |
| S1 | % | Percentage of used Survivor 1 memory |
| E | % | Percentage of used Eden memory |
| O | % | Percentage of used Old memory |
| M | % | Percentage of used Metaspace memory |
| CCS | % | Percentage of memory used by compressed class space |
| FGC | - | Full GC count |
| YGC | ms | Young GC count |
| YGCT | s | Young GC time |
| FGCT | s | Full GC time |
| GCT | s | Garbage collection time |
| ReceivedBytes | Bytes/s | Data receiving rate |
| SentBytes | Bytes/s | Data sending rate |
| RpcQueueTimeNumOps | Calls/s | RPC call rate |
| RpcQueueTimeAvgTime | ms | Average RPC delay |
| RpcAuthenticationFailures | Failures/s | Number of RPC authentication failures |
| RpcAuthenticationSuccesses | Successes/s | Number of RPC authentication successes |
| RpcAuthorizationFailures | Failures/s | Number of RPC authorization failures |
| RpcAuthorizationSuccesses | Successes/s | Number of RPC authorization successes |
| NumOpenConnections | - | Number of current connections |
| CallQueueLength | - | Length of current RPC processing queue |
| CurrentThreadSystemTime | ms | System time |
| CurrentThreadUserTime | ms | User time |
| StartTime | s | Process start time |
| PeckThreadCount | - | Peak number of threads |
| DaemonThreadCount | - | Number of background threads |
| write | MB/s | Disk write rate |
| read | Queries/s | QPS of read operations |
| FsyncNanosOps | Operation/s | Average number of Fsync operations |
| DataPacketOps | Operations/s | QPS of packet transmission operations |
| Metric Name | Unit | Description |
|---|---|---|
| MemNonHeapUsedM | MB | Size of NonHeapMemory currently used by JVM |
| MemNonHeapCommittedM | MB | JVM memory |
| MemHeapUsedM | MB | Size of HeapMemory currently used by JVM |
| MemHeapCommittedM | MB | Submitted size of JVM HeapMemory |
| MemHeapMaxM | MB | Size of HeapMemory configured by JVM |
| MemMaxM | MB | Maximum memory size that can be used by JVM during runtime |
| ThreadsNew | - | Number of threads in new state |
| ThreadsRunnable | - | Number of threads in runnable state |
| ThreadsBlocked | - | Number of threads in blocked state |
| ThreadsWaiting | - | Number of threads in WAITING state |
| ThreadsTimedWaiting | - | Number of threads in TIMED WAITING state |
| ThreadsTerminated | - | Number of threads in Terminated state |
| LogFatal | - | Number of Fatal logs |
| LogError | - | Number of Error logs |
| LogWarn | - | Number of Warn logs |
| LogInfo | - | Number of Info logs |
| S0 | % | Percentage of used Survivor 0 memory |
| S1 | % | Percentage of used Survivor 1 memory |
| E | % | Percentage of used Eden memory |
| O | % | Percentage of used Old memory |
| M | % | Percentage of used Metaspace memory |
| CCS | % | Percentage of memory used by compressed class space |
| FGC | - | Full GC count |
| YGC | - | Young GC count |
| YGCT | s | Young GC time |
| FGCT | s | Full GC time |
| GCT | s | Garbage collection time |
| ReceivedBytes | Bytes/s | Data receiving rate |
| SentBytes | Bytes/s | Data sending rate |
| RpcQueueTimeNumOps | Calls/s | RPC call rate |
| RpcQueueTimeAvgTime | ms | Average RPC delay |
| RpcAuthenticationFailures | Failures/s | Number of RPC authentication failures |
| RpcAuthenticationSuccesses | Successes/s | Number of RPC authentication successes |
| RpcAuthorizationFailures | Failures/s | Number of RPC authorization failures |
| NumOpenConnections | - | Number of current connections |
| CallQueueLength | - | Length of current RPC processing queue |
| CurrentThreadSystemTime | ms | System time |
| CurrentThreadUserTime | ms | User time |
| StartTime | s | Process start time |
| ThreadCount | - | Number of threads |
| PeckThreadCount | - | Peak number of threads |
| DaemonThreadCount | - | Number of background threads |
| Metric Name | Unit | Description |
|---|---|---|
| S0 | % | Percentage of used Survivor 0 memory |
| S1 | % | Percentage of used Survivor 1 memory |
| E | % | Percentage of used Eden memory |
| O | % | Percentage of used Old memory |
| M | % | Percentage of used Metaspace memory |
| CCS | % | Percentage of memory used by compressed class space |
| FGC | - | Full GC count |
| YGC | - | Young GC count |
| YGCT | s | Young GC time |
| FGCT | s | Full GC time |
| GCT | s | Garbage collection time |
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