StreamStatisticNames (Apache Hadoop Main 3.3.5 API)

java.lang.Object
- org.apache.hadoop.fs.statistics.StreamStatisticNames

```
@InterfaceAudience.Public
 @InterfaceStability.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 Summary

Fields
Modifier and Type	Field and Description
`static String`	`BLOCKS_ALLOCATED` Total number of Data blocks allocated by an outputStream.
`static String`	`BLOCKS_RELEASED` Total number of Data blocks released by an outputStream.
`static String`	`BYTES_READ_BUFFER` Number of bytes read from the buffer.
`static String`	`BYTES_TO_UPLOAD` Number of bytes to upload from an OutputStream.
`static String`	`BYTES_UPLOAD_FAILED` Number of bytes failed to upload to the object store.
`static String`	`BYTES_UPLOAD_SUCCESSFUL` Number of bytes uploaded successfully to the object store.
`static String`	`QUEUE_SHRUNK_OPS` Number of task queue shrunk operations.
`static String`	`READ_AHEAD_BYTES_READ` Total number of bytes read from readAhead.
`static String`	`REMOTE_BYTES_READ` Total number of bytes read from remote operations.
`static String`	`REMOTE_READ_OP` Total number of remote read operations performed.
`static String`	`SEEK_IN_BUFFER` Number of seeks in buffer.
`static String`	`STREAM_READ_ABORTED` Count of times the TCP stream was aborted.
`static String`	`STREAM_READ_BYTES` Bytes read from an input stream in read()/readVectored() calls.
`static String`	`STREAM_READ_BYTES_DISCARDED_ABORT` Count of bytes discarded by aborting an input stream .
`static String`	`STREAM_READ_BYTES_DISCARDED_CLOSE` Count of bytes read and discarded when closing an input stream.
`static String`	`STREAM_READ_CLOSE_OPERATIONS` Total count of times an attempt to close an input stream was made.
`static String`	`STREAM_READ_CLOSED` Count of times the TCP stream was closed.
`static String`	`STREAM_READ_EXCEPTIONS` Count of exceptions raised during input stream reads.
`static String`	`STREAM_READ_FULLY_OPERATIONS` Count of readFully() operations in an input stream.
`static String`	`STREAM_READ_OPENED` Total count of times an input stream to was opened.
`static String`	`STREAM_READ_OPERATIONS` Count of read() operations in an input stream.
`static 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.
`static String`	`STREAM_READ_REMOTE_STREAM_ABORTED` count/duration of aborting a remote stream during stream IO IO.
`static String`	`STREAM_READ_REMOTE_STREAM_DRAINED` count/duration of closing a remote stream, possibly including draining the stream to recycle the HTTP connection.
`static String`	`STREAM_READ_SEEK_BACKWARD_OPERATIONS` Count of executed seek operations which went backwards in a stream.
`static String`	`STREAM_READ_SEEK_BYTES_BACKWARDS` Count of bytes moved backwards during seek operations in an input stream.
`static String`	`STREAM_READ_SEEK_BYTES_DISCARDED` Count of bytes read and discarded during seek() in an input stream.
`static String`	`STREAM_READ_SEEK_BYTES_SKIPPED` Count of bytes skipped during forward seek operations.
`static String`	`STREAM_READ_SEEK_FORWARD_OPERATIONS` Count of executed seek operations which went forward in an input stream.
`static String`	`STREAM_READ_SEEK_OPERATIONS` Count of seek operations in an input stream.
`static String`	`STREAM_READ_SEEK_POLICY_CHANGED` Count of times the seek policy was dynamically changed in an input stream.
`static String`	`STREAM_READ_SKIP_BYTES` Count bytes skipped in `InputStream.skip()` calls.
`static String`	`STREAM_READ_SKIP_OPERATIONS` Count of `InputStream.skip()` calls.
`static String`	`STREAM_READ_TOTAL_BYTES` Total count of bytes read from an input stream.
`static String`	`STREAM_READ_UNBUFFERED` Count of calls of `CanUnbuffer.unbuffer()`.
`static String`	`STREAM_READ_VECTORED_COMBINED_RANGES` Count of combined file ranges during readVectored() operation.
`static String`	`STREAM_READ_VECTORED_INCOMING_RANGES` Count of incoming file ranges during readVectored() operation.
`static String`	`STREAM_READ_VECTORED_OPERATIONS` Count of readVectored() operations in an input stream.
`static String`	`STREAM_READ_VECTORED_READ_BYTES_DISCARDED` Count of bytes discarded during readVectored() operation in an input stream.
`static String`	`STREAM_READ_VERSION_MISMATCHES` Count of version mismatches encountered while reading an input stream.
`static String`	`STREAM_WRITE_BLOCK_UPLOADS` Count of block/partition uploads complete.
`static String`	`STREAM_WRITE_BLOCK_UPLOADS_ABORTED` Count of number of block uploads aborted.
`static String`	`STREAM_WRITE_BLOCK_UPLOADS_ACTIVE` Count of block/partition uploads active.
`static String`	`STREAM_WRITE_BLOCK_UPLOADS_BYTES_PENDING` Gauge of data queued to be written.
`static String`	`STREAM_WRITE_BLOCK_UPLOADS_COMMITTED` Count of number of block uploads committed.
`static String`	`STREAM_WRITE_BLOCK_UPLOADS_PENDING` Gauge of block/partitions uploads queued to be written.
`static String`	`STREAM_WRITE_BYTES` "Count of bytes written to output stream including all not yet uploaded.
`static String`	`STREAM_WRITE_EXCEPTIONS` "Count of stream write failures reported.
`static String`	`STREAM_WRITE_EXCEPTIONS_COMPLETING_UPLOADS` Count of failures when finalizing a multipart upload: "stream_write_exceptions_completing_upload".
`static String`	`STREAM_WRITE_QUEUE_DURATION` Total queue duration of all block uploads.
`static String`	`STREAM_WRITE_TOTAL_DATA`
`static String`	`STREAM_WRITE_TOTAL_TIME` Count of total time taken for uploads to complete.
`static String`	`TIME_SPENT_ON_PUT_REQUEST` Total time spent on completing a PUT request.
`static String`	`TIME_SPENT_ON_TASK_WAIT` Total time spent on waiting for a task to complete.
`static String`	`WRITE_CURRENT_BUFFER_OPERATIONS` Number of times current buffer is written to the service.

Method Summary
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - STREAM_READ_ABORTED
```
public static final String STREAM_READ_ABORTED
```
    Count of times the TCP stream was aborted. Value: "stream_aborted".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - STREAM_READ_CLOSED
```
public static final String STREAM_READ_CLOSED
```
    Count of times the TCP stream was closed. Value: "stream_read_closed".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - STREAM_READ_EXCEPTIONS
```
public static final String STREAM_READ_EXCEPTIONS
```
    Count of exceptions raised during input stream reads. Value: "stream_read_exceptions".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - STREAM_READ_OPERATIONS
```
public static final String STREAM_READ_OPERATIONS
```
    Count of read() operations in an input stream. Value: "stream_read_operations".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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"
    
    See Also:
    
    Constant Field Values
  - 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"
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - STREAM_READ_SKIP_OPERATIONS
```
public static final String STREAM_READ_SKIP_OPERATIONS
```
    Count of InputStream.skip() calls. Value: "stream_read_skip_operations".
    
    See Also:
    
    Constant Field Values
  - STREAM_READ_SKIP_BYTES
```
public static final String STREAM_READ_SKIP_BYTES
```
    Count bytes skipped in InputStream.skip() calls. Value: "stream_read_skip_bytes".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - STREAM_READ_UNBUFFERED
```
public static final String STREAM_READ_UNBUFFERED
```
    Count of calls of CanUnbuffer.unbuffer(). Value: "stream_read_unbuffered".
    
    See Also:
    
    Constant Field Values
  - STREAM_WRITE_EXCEPTIONS
```
public static final String STREAM_WRITE_EXCEPTIONS
```
    "Count of stream write failures reported. Value: "stream_write_exceptions".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - STREAM_WRITE_BLOCK_UPLOADS
```
public static final String STREAM_WRITE_BLOCK_UPLOADS
```
    Count of block/partition uploads complete. Value: "stream_write_block_uploads".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - 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".
    
    See Also:
    
    Constant Field Values
  - STREAM_WRITE_QUEUE_DURATION
```
public static final String STREAM_WRITE_QUEUE_DURATION
```
    Total queue duration of all block uploads. "stream_write_queue_duration".
    
    See Also:
    
    Constant Field Values
  - STREAM_WRITE_TOTAL_DATA
```
public static final String STREAM_WRITE_TOTAL_DATA
```
    See Also:
    
    Constant Field Values
  - BYTES_TO_UPLOAD
```
public static final String BYTES_TO_UPLOAD
```
    Number of bytes to upload from an OutputStream.
    
    See Also:
    
    Constant Field Values
  - BYTES_UPLOAD_SUCCESSFUL
```
public static final String BYTES_UPLOAD_SUCCESSFUL
```
    Number of bytes uploaded successfully to the object store.
    
    See Also:
    
    Constant Field Values
  - BYTES_UPLOAD_FAILED
```
public static final String BYTES_UPLOAD_FAILED
```
    Number of bytes failed to upload to the object store.
    
    See Also:
    
    Constant Field Values
  - TIME_SPENT_ON_TASK_WAIT
```
public static final String TIME_SPENT_ON_TASK_WAIT
```
    Total time spent on waiting for a task to complete.
    
    See Also:
    
    Constant Field Values
  - QUEUE_SHRUNK_OPS
```
public static final String QUEUE_SHRUNK_OPS
```
    Number of task queue shrunk operations.
    
    See Also:
    
    Constant Field Values
  - WRITE_CURRENT_BUFFER_OPERATIONS
```
public static final String WRITE_CURRENT_BUFFER_OPERATIONS
```
    Number of times current buffer is written to the service.
    
    See Also:
    
    Constant Field Values
  - TIME_SPENT_ON_PUT_REQUEST
```
public static final String TIME_SPENT_ON_PUT_REQUEST
```
    Total time spent on completing a PUT request.
    
    See Also:
    
    Constant Field Values
  - SEEK_IN_BUFFER
```
public static final String SEEK_IN_BUFFER
```
    Number of seeks in buffer.
    
    See Also:
    
    Constant Field Values
  - BYTES_READ_BUFFER
```
public static final String BYTES_READ_BUFFER
```
    Number of bytes read from the buffer.
    
    See Also:
    
    Constant Field Values
  - REMOTE_READ_OP
```
public static final String REMOTE_READ_OP
```
    Total number of remote read operations performed.
    
    See Also:
    
    Constant Field Values
  - READ_AHEAD_BYTES_READ
```
public static final String READ_AHEAD_BYTES_READ
```
    Total number of bytes read from readAhead.
    
    See Also:
    
    Constant Field Values
  - REMOTE_BYTES_READ
```
public static final String REMOTE_BYTES_READ
```
    Total number of bytes read from remote operations.
    
    See Also:
    
    Constant Field Values
  - BLOCKS_ALLOCATED
```
public static final String BLOCKS_ALLOCATED
```
    Total number of Data blocks allocated by an outputStream.
    
    See Also:
    
    Constant Field Values
  - BLOCKS_RELEASED
```
public static final String BLOCKS_RELEASED
```
    Total number of Data blocks released by an outputStream.
    
    See Also:
    
    Constant Field Values

Class StreamStatisticNames

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

STREAM_READ_ABORTED

STREAM_READ_BYTES

STREAM_READ_BYTES_DISCARDED_ABORT

STREAM_READ_BYTES_DISCARDED_CLOSE

STREAM_READ_CLOSED

STREAM_READ_CLOSE_OPERATIONS

STREAM_READ_OPENED

STREAM_READ_EXCEPTIONS

STREAM_READ_FULLY_OPERATIONS

STREAM_READ_OPERATIONS

STREAM_READ_VECTORED_OPERATIONS

STREAM_READ_VECTORED_READ_BYTES_DISCARDED

STREAM_READ_VECTORED_INCOMING_RANGES

STREAM_READ_VECTORED_COMBINED_RANGES

STREAM_READ_OPERATIONS_INCOMPLETE

STREAM_READ_REMOTE_STREAM_ABORTED

STREAM_READ_REMOTE_STREAM_DRAINED

STREAM_READ_VERSION_MISMATCHES

STREAM_READ_SEEK_BACKWARD_OPERATIONS

STREAM_READ_SEEK_BYTES_BACKWARDS

STREAM_READ_SEEK_BYTES_DISCARDED

STREAM_READ_SEEK_BYTES_SKIPPED

STREAM_READ_SEEK_FORWARD_OPERATIONS

STREAM_READ_SEEK_POLICY_CHANGED

STREAM_READ_SEEK_OPERATIONS

STREAM_READ_SKIP_OPERATIONS

STREAM_READ_SKIP_BYTES

STREAM_READ_TOTAL_BYTES

STREAM_READ_UNBUFFERED

STREAM_WRITE_EXCEPTIONS

STREAM_WRITE_EXCEPTIONS_COMPLETING_UPLOADS

STREAM_WRITE_BLOCK_UPLOADS

STREAM_WRITE_BLOCK_UPLOADS_ABORTED

STREAM_WRITE_BLOCK_UPLOADS_ACTIVE

STREAM_WRITE_BLOCK_UPLOADS_BYTES_PENDING

STREAM_WRITE_BLOCK_UPLOADS_COMMITTED

STREAM_WRITE_BLOCK_UPLOADS_PENDING

STREAM_WRITE_BYTES

STREAM_WRITE_TOTAL_TIME

STREAM_WRITE_QUEUE_DURATION

STREAM_WRITE_TOTAL_DATA

BYTES_TO_UPLOAD

BYTES_UPLOAD_SUCCESSFUL

BYTES_UPLOAD_FAILED

TIME_SPENT_ON_TASK_WAIT

QUEUE_SHRUNK_OPS

WRITE_CURRENT_BUFFER_OPERATIONS

TIME_SPENT_ON_PUT_REQUEST

SEEK_IN_BUFFER

BYTES_READ_BUFFER

REMOTE_READ_OP

READ_AHEAD_BYTES_READ

REMOTE_BYTES_READ

BLOCKS_ALLOCATED

BLOCKS_RELEASED