Package org.apache.hadoop.fs.statistics

Class StreamStatisticNames

java.lang.Object
org.apache.hadoop.fs.statistics.StreamStatisticNames
@Public @Evolving public final class StreamStatisticNames extends Object
These are common statistic names.

When adding new common statistic name constants, please make them unique. By convention, they are implicitly unique:

  • The name of the constants are uppercase, words separated by underscores.
  • The value of the constants are lowercase of the constant names.

  • Field Details

    • STREAM_LEAKS

      public static final String STREAM_LEAKS
      Count of Stream leaks from an application which is not cleaning up correctly. Value :"stream_leaks".
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    • STREAM_READ_ABORTED

      public static final String STREAM_READ_ABORTED
      Count of times the TCP stream was aborted. Value: "stream_aborted".
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    • STREAM_READ_BYTES

      public static final String STREAM_READ_BYTES
      Bytes read from an input stream in read()/readVectored() calls. Does not include bytes read and then discarded in seek/close etc. These are the bytes returned to the caller. Value: "stream_read_bytes".
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    • STREAM_READ_BYTES_DISCARDED_ABORT

      public static final String STREAM_READ_BYTES_DISCARDED_ABORT
      Count of bytes discarded by aborting an input stream . Value: "stream_read_bytes_discarded_in_abort".
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    • STREAM_READ_BYTES_DISCARDED_CLOSE

      public static final String STREAM_READ_BYTES_DISCARDED_CLOSE
      Count of bytes read and discarded when closing an input stream. Value: "stream_read_bytes_discarded_in_close".
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    • STREAM_READ_CLOSED

      public static final String STREAM_READ_CLOSED
      Count of times the TCP stream was closed. Value: "stream_read_closed".
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    • STREAM_READ_CLOSE_OPERATIONS

      public static final String STREAM_READ_CLOSE_OPERATIONS
      Total count of times an attempt to close an input stream was made. Value: "stream_read_close_operations".
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    • STREAM_READ_OPENED

      public static final String STREAM_READ_OPENED
      Total count of times an input stream to was opened. For object stores, that means the count a GET request was initiated. Value: "stream_read_opened".
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    • STREAM_READ_ANALYTICS_OPENED

      public static final String STREAM_READ_ANALYTICS_OPENED
      Total count of times an analytics input stream was opened. Value: "stream_read_analytics_opened".
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    • ANALYTICS_STREAM_FACTORY_CLOSED

      public static final String ANALYTICS_STREAM_FACTORY_CLOSED
      Total count of times object stream factory was closed. Value: "analytics_stream_factory_closed".
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    • STREAM_READ_EXCEPTIONS

      public static final String STREAM_READ_EXCEPTIONS
      Count of exceptions raised during input stream reads. Value: "stream_read_exceptions".
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    • STREAM_READ_FULLY_OPERATIONS

      public static final String STREAM_READ_FULLY_OPERATIONS
      Count of readFully() operations in an input stream. Value: "stream_read_fully_operations".
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    • STREAM_READ_OPERATIONS

      public static final String STREAM_READ_OPERATIONS
      Count of read() operations in an input stream. Value: "stream_read_operations".
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    • STREAM_READ_VECTORED_OPERATIONS

      public static final String STREAM_READ_VECTORED_OPERATIONS
      Count of readVectored() operations in an input stream. Value: "stream_read_vectored_operations".
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    • STREAM_READ_VECTORED_READ_BYTES_DISCARDED

      public static final String STREAM_READ_VECTORED_READ_BYTES_DISCARDED
      Count of bytes discarded during readVectored() operation in an input stream. Value: "stream_read_vectored_read_bytes_discarded".
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    • STREAM_READ_VECTORED_INCOMING_RANGES

      public static final String STREAM_READ_VECTORED_INCOMING_RANGES
      Count of incoming file ranges during readVectored() operation. Value: "stream_read_vectored_incoming_ranges"
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    • STREAM_READ_VECTORED_COMBINED_RANGES

      public static final String STREAM_READ_VECTORED_COMBINED_RANGES
      Count of combined file ranges during readVectored() operation. Value: "stream_read_vectored_combined_ranges"
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    • STREAM_READ_OPERATIONS_INCOMPLETE

      public static final String STREAM_READ_OPERATIONS_INCOMPLETE
      Count of incomplete read() operations in an input stream, that is, when the bytes returned were less than that requested. Value: "stream_read_operations_incomplete".
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    • STREAM_READ_REMOTE_STREAM_ABORTED

      public static final String STREAM_READ_REMOTE_STREAM_ABORTED
      count/duration of aborting a remote stream during stream IO IO. Value: "stream_read_remote_stream_aborted".
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    • STREAM_READ_REMOTE_STREAM_DRAINED

      public static final String STREAM_READ_REMOTE_STREAM_DRAINED
      count/duration of closing a remote stream, possibly including draining the stream to recycle the HTTP connection. Value: "stream_read_remote_stream_drain".
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    • STREAM_READ_VERSION_MISMATCHES

      public static final String STREAM_READ_VERSION_MISMATCHES
      Count of version mismatches encountered while reading an input stream. Value: "stream_read_version_mismatches".
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    • STREAM_READ_SEEK_BACKWARD_OPERATIONS

      public static final String STREAM_READ_SEEK_BACKWARD_OPERATIONS
      Count of executed seek operations which went backwards in a stream. Value: "stream_read_seek_backward_operations".
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    • STREAM_READ_SEEK_BYTES_BACKWARDS

      public static final String STREAM_READ_SEEK_BYTES_BACKWARDS
      Count of bytes moved backwards during seek operations in an input stream. Value: "stream_read_bytes_backwards_on_seek".
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    • STREAM_READ_SEEK_BYTES_DISCARDED

      public static final String STREAM_READ_SEEK_BYTES_DISCARDED
      Count of bytes read and discarded during seek() in an input stream. Value: "stream_read_seek_bytes_discarded".
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    • STREAM_READ_SEEK_BYTES_SKIPPED

      public static final String STREAM_READ_SEEK_BYTES_SKIPPED
      Count of bytes skipped during forward seek operations. Value: "stream_read_seek_bytes_skipped".
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    • STREAM_READ_SEEK_FORWARD_OPERATIONS

      public static final String STREAM_READ_SEEK_FORWARD_OPERATIONS
      Count of executed seek operations which went forward in an input stream. Value: "stream_read_seek_forward_operations".
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    • STREAM_READ_SEEK_POLICY_CHANGED

      public static final String STREAM_READ_SEEK_POLICY_CHANGED
      Count of times the seek policy was dynamically changed in an input stream. Value: "stream_read_seek_policy_changed".
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    • STREAM_READ_SEEK_OPERATIONS

      public static final String STREAM_READ_SEEK_OPERATIONS
      Count of seek operations in an input stream. Value: "stream_read_seek_operations".
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    • STREAM_READ_SKIP_OPERATIONS

      public static final String STREAM_READ_SKIP_OPERATIONS
      Count of InputStream.skip() calls. Value: "stream_read_skip_operations".
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    • STREAM_READ_SKIP_BYTES

      public static final String STREAM_READ_SKIP_BYTES
      Count bytes skipped in InputStream.skip() calls. Value: "stream_read_skip_bytes".
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    • STREAM_READ_TOTAL_BYTES

      public static final String STREAM_READ_TOTAL_BYTES
      Total count of bytes read from an input stream. Value: "stream_read_total_bytes".
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    • STREAM_READ_UNBUFFERED

      public static final String STREAM_READ_UNBUFFERED
      Count of calls of CanUnbuffer.unbuffer(). Value: "stream_read_unbuffered".
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    • STREAM_WRITE_EXCEPTIONS

      public static final String STREAM_WRITE_EXCEPTIONS
      "Count of stream write failures reported. Value: "stream_write_exceptions".
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    • STREAM_WRITE_EXCEPTIONS_COMPLETING_UPLOADS

      public static final String STREAM_WRITE_EXCEPTIONS_COMPLETING_UPLOADS
      Count of failures when finalizing a multipart upload: "stream_write_exceptions_completing_upload".
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    • STREAM_WRITE_BLOCK_UPLOADS

      public static final String STREAM_WRITE_BLOCK_UPLOADS
      Count of block/partition uploads complete. Value: "stream_write_block_uploads".
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    • STREAM_WRITE_BLOCK_UPLOADS_ABORTED

      public static final String STREAM_WRITE_BLOCK_UPLOADS_ABORTED
      Count of number of block uploads aborted. Value: "stream_write_block_uploads_aborted".
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    • STREAM_WRITE_BLOCK_UPLOADS_ACTIVE

      public static final String STREAM_WRITE_BLOCK_UPLOADS_ACTIVE
      Count of block/partition uploads active. Value: "stream_write_block_uploads_active".
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    • STREAM_WRITE_BLOCK_UPLOADS_BYTES_PENDING

      public static final String STREAM_WRITE_BLOCK_UPLOADS_BYTES_PENDING
      Gauge of data queued to be written. Value: "stream_write_block_uploads_data_pending".
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    • STREAM_WRITE_BLOCK_UPLOADS_COMMITTED

      public static final String STREAM_WRITE_BLOCK_UPLOADS_COMMITTED
      Count of number of block uploads committed. Value: "stream_write_block_uploads_committed".
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    • STREAM_WRITE_BLOCK_UPLOADS_PENDING

      public static final String STREAM_WRITE_BLOCK_UPLOADS_PENDING
      Gauge of block/partitions uploads queued to be written. Value: "stream_write_block_uploads_pending".
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    • STREAM_WRITE_BYTES

      public static final String STREAM_WRITE_BYTES
      "Count of bytes written to output stream including all not yet uploaded. "stream_write_bytes".
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    • STREAM_WRITE_TOTAL_TIME

      public static final String STREAM_WRITE_TOTAL_TIME
      Count of total time taken for uploads to complete. "stream_write_total_time".
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    • STREAM_WRITE_QUEUE_DURATION

      public static final String STREAM_WRITE_QUEUE_DURATION
      Total queue duration of all block uploads. "stream_write_queue_duration".
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    • STREAM_WRITE_TOTAL_DATA

      public static final String STREAM_WRITE_TOTAL_DATA
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    • BYTES_TO_UPLOAD

      public static final String BYTES_TO_UPLOAD
      Number of bytes to upload from an OutputStream.
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    • BYTES_UPLOAD_SUCCESSFUL

      public static final String BYTES_UPLOAD_SUCCESSFUL
      Number of bytes uploaded successfully to the object store.
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    • BYTES_UPLOAD_FAILED

      public static final String BYTES_UPLOAD_FAILED
      Number of bytes failed to upload to the object store.
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    • TIME_SPENT_ON_TASK_WAIT

      public static final String TIME_SPENT_ON_TASK_WAIT
      Total time spent on waiting for a task to complete.
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    • QUEUE_SHRUNK_OPS

      public static final String QUEUE_SHRUNK_OPS
      Number of task queue shrunk operations.
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    • WRITE_CURRENT_BUFFER_OPERATIONS

      public static final String WRITE_CURRENT_BUFFER_OPERATIONS
      Number of times current buffer is written to the service.
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    • TIME_SPENT_ON_PUT_REQUEST

      public static final String TIME_SPENT_ON_PUT_REQUEST
      Total time spent on completing a PUT request.
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    • SEEK_IN_BUFFER

      public static final String SEEK_IN_BUFFER
      Number of seeks in buffer.
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    • BYTES_READ_BUFFER

      public static final String BYTES_READ_BUFFER
      Number of bytes read from the buffer.
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    • REMOTE_READ_OP

      public static final String REMOTE_READ_OP
      Total number of remote read operations performed.
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    • READ_AHEAD_BYTES_READ

      public static final String READ_AHEAD_BYTES_READ
      Total number of bytes read from readAhead.
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    • REMOTE_BYTES_READ

      public static final String REMOTE_BYTES_READ
      Total number of bytes read from remote operations.
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    • BLOCKS_ALLOCATED

      public static final String BLOCKS_ALLOCATED
      Total number of Data blocks allocated by an outputStream.
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    • BLOCKS_RELEASED

      public static final String BLOCKS_RELEASED
      Total number of Data blocks released by an outputStream.
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    • STREAM_READ_PREFETCH_OPERATIONS

      public static final String STREAM_READ_PREFETCH_OPERATIONS
      Total number of prefetching operations executed.
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    • STREAM_READ_BLOCKS_IN_FILE_CACHE

      public static final String STREAM_READ_BLOCKS_IN_FILE_CACHE
      Total number of block in disk cache.
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    • STREAM_READ_ACTIVE_PREFETCH_OPERATIONS

      public static final String STREAM_READ_ACTIVE_PREFETCH_OPERATIONS
      Total number of active prefetch operations.
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    • STREAM_READ_ACTIVE_MEMORY_IN_USE

      public static final String STREAM_READ_ACTIVE_MEMORY_IN_USE
      Total bytes of memory in use by this input stream.
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    • STREAM_READ_REMOTE_BLOCK_READ

      public static final String STREAM_READ_REMOTE_BLOCK_READ
      count/duration of reading a remote block. Value: "stream_read_block_read".
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    • STREAM_READ_BLOCK_ACQUIRE_AND_READ

      public static final String STREAM_READ_BLOCK_ACQUIRE_AND_READ
      count/duration of acquiring a buffer and reading to it. Value: "stream_read_block_acquire_read".
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    • STREAM_EVICT_BLOCKS_FROM_FILE_CACHE

      public static final String STREAM_EVICT_BLOCKS_FROM_FILE_CACHE
      Total number of blocks evicted from the disk cache.
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    • STREAM_FILE_CACHE_EVICTION

      public static final String STREAM_FILE_CACHE_EVICTION
      Track duration of LRU cache eviction for disk cache.
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    • STREAM_READ_PREFETCHED_BYTES

      public static final String STREAM_READ_PREFETCHED_BYTES
      Bytes that were prefetched by the stream.
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    • STREAM_READ_CACHE_HIT

      public static final String STREAM_READ_CACHE_HIT
      A cache hit occurs when the request range can be satisfied by the data in the cache.
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