Package org.apache.hadoop.fs.statistics

Class StreamStatisticNames

java.lang.Object

org.apache.hadoop.fs.statistics.StreamStatisticNames

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

Count of times the TCP stream was aborted. Value: "stream_aborted".

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Constant Field Values

STREAM_READ_BYTES

public static final java.lang.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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Constant Field Values

STREAM_READ_BYTES_DISCARDED_ABORT

public static final java.lang.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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Constant Field Values

STREAM_READ_BYTES_DISCARDED_CLOSE

public static final java.lang.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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Constant Field Values

STREAM_READ_CLOSED

public static final java.lang.String STREAM_READ_CLOSED

Count of times the TCP stream was closed. Value: "stream_read_closed".

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Constant Field Values

STREAM_READ_CLOSE_OPERATIONS

public static final java.lang.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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Constant Field Values

STREAM_READ_OPENED

public static final java.lang.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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Constant Field Values

STREAM_READ_EXCEPTIONS

public static final java.lang.String STREAM_READ_EXCEPTIONS

Count of exceptions raised during input stream reads. Value: "stream_read_exceptions".

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Constant Field Values

STREAM_READ_FULLY_OPERATIONS

public static final java.lang.String STREAM_READ_FULLY_OPERATIONS

Count of readFully() operations in an input stream. Value: "stream_read_fully_operations".

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Constant Field Values

STREAM_READ_OPERATIONS

public static final java.lang.String STREAM_READ_OPERATIONS

Count of read() operations in an input stream. Value: "stream_read_operations".

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Constant Field Values

STREAM_READ_VECTORED_OPERATIONS

public static final java.lang.String STREAM_READ_VECTORED_OPERATIONS

Count of readVectored() operations in an input stream. Value: "stream_read_vectored_operations".

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Constant Field Values

STREAM_READ_VECTORED_READ_BYTES_DISCARDED

public static final java.lang.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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Constant Field Values

STREAM_READ_VECTORED_INCOMING_RANGES

public static final java.lang.String STREAM_READ_VECTORED_INCOMING_RANGES

Count of incoming file ranges during readVectored() operation. Value: "stream_read_vectored_incoming_ranges"

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Constant Field Values

STREAM_READ_VECTORED_COMBINED_RANGES

public static final java.lang.String STREAM_READ_VECTORED_COMBINED_RANGES

Count of combined file ranges during readVectored() operation. Value: "stream_read_vectored_combined_ranges"

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Constant Field Values

STREAM_READ_OPERATIONS_INCOMPLETE

public static final java.lang.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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Constant Field Values

STREAM_READ_REMOTE_STREAM_ABORTED

public static final java.lang.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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Constant Field Values

STREAM_READ_REMOTE_STREAM_DRAINED

public static final java.lang.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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Constant Field Values

STREAM_READ_VERSION_MISMATCHES

public static final java.lang.String STREAM_READ_VERSION_MISMATCHES

Count of version mismatches encountered while reading an input stream. Value: "stream_read_version_mismatches".

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Constant Field Values

STREAM_READ_SEEK_BACKWARD_OPERATIONS

public static final java.lang.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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Constant Field Values

STREAM_READ_SEEK_BYTES_BACKWARDS

public static final java.lang.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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Constant Field Values

STREAM_READ_SEEK_BYTES_DISCARDED

public static final java.lang.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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Constant Field Values

STREAM_READ_SEEK_BYTES_SKIPPED

public static final java.lang.String STREAM_READ_SEEK_BYTES_SKIPPED

Count of bytes skipped during forward seek operations. Value: "stream_read_seek_bytes_skipped".

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Constant Field Values

STREAM_READ_SEEK_FORWARD_OPERATIONS

public static final java.lang.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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Constant Field Values

STREAM_READ_SEEK_POLICY_CHANGED

public static final java.lang.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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Constant Field Values

STREAM_READ_SEEK_OPERATIONS

public static final java.lang.String STREAM_READ_SEEK_OPERATIONS

Count of seek operations in an input stream. Value: "stream_read_seek_operations".

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Constant Field Values

STREAM_READ_SKIP_OPERATIONS

public static final java.lang.String STREAM_READ_SKIP_OPERATIONS

Count of InputStream.skip() calls. Value: "stream_read_skip_operations".

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Constant Field Values

STREAM_READ_SKIP_BYTES

public static final java.lang.String STREAM_READ_SKIP_BYTES

Count bytes skipped in InputStream.skip() calls. Value: "stream_read_skip_bytes".

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Constant Field Values

STREAM_READ_TOTAL_BYTES

public static final java.lang.String STREAM_READ_TOTAL_BYTES

Total count of bytes read from an input stream. Value: "stream_read_total_bytes".

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Constant Field Values

STREAM_READ_UNBUFFERED

public static final java.lang.String STREAM_READ_UNBUFFERED

Count of calls of CanUnbuffer.unbuffer(). Value: "stream_read_unbuffered".

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Constant Field Values

STREAM_WRITE_EXCEPTIONS

public static final java.lang.String STREAM_WRITE_EXCEPTIONS

"Count of stream write failures reported. Value: "stream_write_exceptions".

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Constant Field Values

STREAM_WRITE_EXCEPTIONS_COMPLETING_UPLOADS

public static final java.lang.String STREAM_WRITE_EXCEPTIONS_COMPLETING_UPLOADS

Count of failures when finalizing a multipart upload: "stream_write_exceptions_completing_upload".

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Constant Field Values

STREAM_WRITE_BLOCK_UPLOADS

public static final java.lang.String STREAM_WRITE_BLOCK_UPLOADS

Count of block/partition uploads complete. Value: "stream_write_block_uploads".

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Constant Field Values

STREAM_WRITE_BLOCK_UPLOADS_ABORTED

public static final java.lang.String STREAM_WRITE_BLOCK_UPLOADS_ABORTED

Count of number of block uploads aborted. Value: "stream_write_block_uploads_aborted".

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Constant Field Values

STREAM_WRITE_BLOCK_UPLOADS_ACTIVE

public static final java.lang.String STREAM_WRITE_BLOCK_UPLOADS_ACTIVE

Count of block/partition uploads active. Value: "stream_write_block_uploads_active".

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Constant Field Values

STREAM_WRITE_BLOCK_UPLOADS_BYTES_PENDING

public static final java.lang.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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Constant Field Values

STREAM_WRITE_BLOCK_UPLOADS_COMMITTED

public static final java.lang.String STREAM_WRITE_BLOCK_UPLOADS_COMMITTED

Count of number of block uploads committed. Value: "stream_write_block_uploads_committed".

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Constant Field Values

STREAM_WRITE_BLOCK_UPLOADS_PENDING

public static final java.lang.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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Constant Field Values

STREAM_WRITE_BYTES

public static final java.lang.String STREAM_WRITE_BYTES

"Count of bytes written to output stream including all not yet uploaded. "stream_write_bytes".

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Constant Field Values

STREAM_WRITE_TOTAL_TIME

public static final java.lang.String STREAM_WRITE_TOTAL_TIME

Count of total time taken for uploads to complete. "stream_write_total_time".

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Constant Field Values

STREAM_WRITE_QUEUE_DURATION

public static final java.lang.String STREAM_WRITE_QUEUE_DURATION

Total queue duration of all block uploads. "stream_write_queue_duration".

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Constant Field Values

STREAM_WRITE_TOTAL_DATA

public static final java.lang.String STREAM_WRITE_TOTAL_DATA

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Constant Field Values

BYTES_TO_UPLOAD

public static final java.lang.String BYTES_TO_UPLOAD

Number of bytes to upload from an OutputStream.

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Constant Field Values

BYTES_UPLOAD_SUCCESSFUL

public static final java.lang.String BYTES_UPLOAD_SUCCESSFUL

Number of bytes uploaded successfully to the object store.

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Constant Field Values

BYTES_UPLOAD_FAILED

public static final java.lang.String BYTES_UPLOAD_FAILED

Number of bytes failed to upload to the object store.

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Constant Field Values

TIME_SPENT_ON_TASK_WAIT

public static final java.lang.String TIME_SPENT_ON_TASK_WAIT

Total time spent on waiting for a task to complete.

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Constant Field Values

QUEUE_SHRUNK_OPS

public static final java.lang.String QUEUE_SHRUNK_OPS

Number of task queue shrunk operations.

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Constant Field Values

WRITE_CURRENT_BUFFER_OPERATIONS

public static final java.lang.String WRITE_CURRENT_BUFFER_OPERATIONS

Number of times current buffer is written to the service.

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Constant Field Values

TIME_SPENT_ON_PUT_REQUEST

public static final java.lang.String TIME_SPENT_ON_PUT_REQUEST

Total time spent on completing a PUT request.

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Constant Field Values

SEEK_IN_BUFFER

public static final java.lang.String SEEK_IN_BUFFER

Number of seeks in buffer.

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Constant Field Values

BYTES_READ_BUFFER

public static final java.lang.String BYTES_READ_BUFFER

Number of bytes read from the buffer.

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Constant Field Values

REMOTE_READ_OP

public static final java.lang.String REMOTE_READ_OP

Total number of remote read operations performed.

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Constant Field Values

READ_AHEAD_BYTES_READ

public static final java.lang.String READ_AHEAD_BYTES_READ

Total number of bytes read from readAhead.

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Constant Field Values

REMOTE_BYTES_READ

public static final java.lang.String REMOTE_BYTES_READ

Total number of bytes read from remote operations.

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Constant Field Values

BLOCKS_ALLOCATED

public static final java.lang.String BLOCKS_ALLOCATED

Total number of Data blocks allocated by an outputStream.

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Constant Field Values

BLOCKS_RELEASED

public static final java.lang.String BLOCKS_RELEASED

Total number of Data blocks released by an outputStream.

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Constant Field Values

STREAM_READ_PREFETCH_OPERATIONS

public static final java.lang.String STREAM_READ_PREFETCH_OPERATIONS

Total number of prefetching operations executed.

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Constant Field Values

STREAM_READ_BLOCKS_IN_FILE_CACHE

public static final java.lang.String STREAM_READ_BLOCKS_IN_FILE_CACHE

Total number of block in disk cache.

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Constant Field Values

STREAM_READ_ACTIVE_PREFETCH_OPERATIONS

public static final java.lang.String STREAM_READ_ACTIVE_PREFETCH_OPERATIONS

Total number of active prefetch operations.

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Constant Field Values

STREAM_READ_ACTIVE_MEMORY_IN_USE

public static final java.lang.String STREAM_READ_ACTIVE_MEMORY_IN_USE

Total bytes of memory in use by this input stream.

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Constant Field Values

STREAM_READ_REMOTE_BLOCK_READ

public static final java.lang.String STREAM_READ_REMOTE_BLOCK_READ

count/duration of reading a remote block. Value: "stream_read_block_read".

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Constant Field Values

STREAM_READ_BLOCK_ACQUIRE_AND_READ

public static final java.lang.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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Constant Field Values

STREAM_EVICT_BLOCKS_FROM_FILE_CACHE

public static final java.lang.String STREAM_EVICT_BLOCKS_FROM_FILE_CACHE

Total number of blocks evicted from the disk cache.

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Constant Field Values

STREAM_FILE_CACHE_EVICTION

public static final java.lang.String STREAM_FILE_CACHE_EVICTION

Track duration of LRU cache eviction for disk cache.

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Constant Field Values