data_metrics

BytesWritten    Total number of bytes written to DataNode
BytesRead   Total number of bytes read from DataNode
BlocksWritten   Total number of blocks written to DataNode
BlocksRead  Total number of blocks read from DataNode
BlocksReplicated    Total number of blocks replicated
BlocksRemoved   Total number of blocks removed
BlocksVerified  Total number of blocks verified
BlockVerificationFailures   Total number of verifications failures
BlocksCached    Total number of blocks cached
BlocksUncached  Total number of blocks uncached
ReadsFromLocalClient    Total number of read operations from local client
ReadsFromRemoteClient   Total number of read operations from remote client
WritesFromLocalClient   Total number of write operations from local client
WritesFromRemoteClient  Total number of write operations from remote client
BlocksGetLocalPathInfo  Total number of operations to get local path names of blocks
FsyncCount  Total number of fsync
VolumeFailures  Total number of volume failures occurred
ReadBlockOpNumOps   Total number of read operations
ReadBlockOpAvgTime  Average time of read operations in milliseconds
WriteBlockOpNumOps  Total number of write operations
WriteBlockOpAvgTime Average time of write operations in milliseconds
BlockChecksumOpNumOps   Total number of blockChecksum operations
BlockChecksumOpAvgTime  Average time of blockChecksum operations in milliseconds
CopyBlockOpNumOps   Total number of block copy operations
CopyBlockOpAvgTime  Average time of block copy operations in milliseconds
ReplaceBlockOpNumOps    Total number of block replace operations
ReplaceBlockOpAvgTime   Average time of block replace operations in milliseconds
HeartbeatsNumOps    Total number of heartbeats
HeartbeatsAvgTime   Average heartbeat time in milliseconds
BlockReportsNumOps  Total number of block report operations
BlockReportsAvgTime Average time of block report operations in milliseconds
IncrementalBlockReportsNumOps   Total number of incremental block report operations
IncrementalBlockReportsAvgTime  Average time of incremental block report operations in milliseconds
CacheReportsNumOps  Total number of cache report operations
CacheReportsAvgTime Average time of cache report operations in milliseconds
PacketAckRoundTripTimeNanosNumOps   Total number of ack round trip
PacketAckRoundTripTimeNanosAvgTime  Average time from ack send to receive minus the downstream ack time in nanoseconds
FlushNanosNumOps    Total number of flushes
FlushNanosAvgTime   Average flush time in nanoseconds
FsyncNanosNumOps    Total number of fsync
FsyncNanosAvgTime   Average fsync time in nanoseconds
SendDataPacketBlockedOnNetworkNanosNumOps   Total number of sending packets
SendDataPacketBlockedOnNetworkNanosAvgTime  Average waiting time of sending packets in nanoseconds
SendDataPacketTransferNanosNumOps   Total number of sending packets
SendDataPacketTransferNanosAvgTime  Average transfer time of sending packets in nanoseconds