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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.fs.statistics;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
* 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.
*
*
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public final class StreamStatisticNames {
/**
* Count of times the TCP stream was aborted.
* Value: {@value}.
*/
public static final String STREAM_READ_ABORTED = "stream_aborted";
/**
* 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: {@value}.
*/
public static final String STREAM_READ_BYTES
= "stream_read_bytes";
/**
* Count of bytes discarded by aborting an input stream .
* Value: {@value}.
*/
public static final String STREAM_READ_BYTES_DISCARDED_ABORT
= "stream_read_bytes_discarded_in_abort";
/**
* Count of bytes read and discarded when closing an input stream.
* Value: {@value}.
*/
public static final String STREAM_READ_BYTES_DISCARDED_CLOSE
= "stream_read_bytes_discarded_in_close";
/**
* Count of times the TCP stream was closed.
* Value: {@value}.
*/
public static final String STREAM_READ_CLOSED = "stream_read_closed";
/**
* Total count of times an attempt to close an input stream was made.
* Value: {@value}.
*/
public static final String STREAM_READ_CLOSE_OPERATIONS
= "stream_read_close_operations";
/**
* Total count of times an input stream to was opened.
* For object stores, that means the count a GET request was initiated.
* Value: {@value}.
*/
public static final String STREAM_READ_OPENED = "stream_read_opened";
/**
* Count of exceptions raised during input stream reads.
* Value: {@value}.
*/
public static final String STREAM_READ_EXCEPTIONS =
"stream_read_exceptions";
/**
* Count of readFully() operations in an input stream.
* Value: {@value}.
*/
public static final String STREAM_READ_FULLY_OPERATIONS
= "stream_read_fully_operations";
/**
* Count of read() operations in an input stream.
* Value: {@value}.
*/
public static final String STREAM_READ_OPERATIONS =
"stream_read_operations";
/**
* Count of readVectored() operations in an input stream.
* Value: {@value}.
*/
public static final String STREAM_READ_VECTORED_OPERATIONS =
"stream_read_vectored_operations";
/**
* Count of bytes discarded during readVectored() operation
* in an input stream.
* Value: {@value}.
*/
public static final String STREAM_READ_VECTORED_READ_BYTES_DISCARDED =
"stream_read_vectored_read_bytes_discarded";
/**
* Count of incoming file ranges during readVectored() operation.
* Value: {@value}
*/
public static final String STREAM_READ_VECTORED_INCOMING_RANGES =
"stream_read_vectored_incoming_ranges";
/**
* Count of combined file ranges during readVectored() operation.
* Value: {@value}
*/
public static final String STREAM_READ_VECTORED_COMBINED_RANGES =
"stream_read_vectored_combined_ranges";
/**
* Count of incomplete read() operations in an input stream,
* that is, when the bytes returned were less than that requested.
* Value: {@value}.
*/
public static final String STREAM_READ_OPERATIONS_INCOMPLETE
= "stream_read_operations_incomplete";
/**
* count/duration of aborting a remote stream during stream IO
* IO.
* Value: {@value}.
*/
public static final String STREAM_READ_REMOTE_STREAM_ABORTED
= "stream_read_remote_stream_aborted";
/**
* count/duration of closing a remote stream,
* possibly including draining the stream to recycle
* the HTTP connection.
* Value: {@value}.
*/
public static final String STREAM_READ_REMOTE_STREAM_DRAINED
= "stream_read_remote_stream_drain";
/**
* Count of version mismatches encountered while reading an input stream.
* Value: {@value}.
*/
public static final String STREAM_READ_VERSION_MISMATCHES
= "stream_read_version_mismatches";
/**
* Count of executed seek operations which went backwards in a stream.
* Value: {@value}.
*/
public static final String STREAM_READ_SEEK_BACKWARD_OPERATIONS =
"stream_read_seek_backward_operations";
/**
* Count of bytes moved backwards during seek operations
* in an input stream.
* Value: {@value}.
*/
public static final String STREAM_READ_SEEK_BYTES_BACKWARDS
= "stream_read_bytes_backwards_on_seek";
/**
* Count of bytes read and discarded during seek() in an input stream.
* Value: {@value}.
*/
public static final String STREAM_READ_SEEK_BYTES_DISCARDED =
"stream_read_seek_bytes_discarded";
/**
* Count of bytes skipped during forward seek operations.
* Value: {@value}.
*/
public static final String STREAM_READ_SEEK_BYTES_SKIPPED
= "stream_read_seek_bytes_skipped";
/**
* Count of executed seek operations which went forward in
* an input stream.
* Value: {@value}.
*/
public static final String STREAM_READ_SEEK_FORWARD_OPERATIONS
= "stream_read_seek_forward_operations";
/**
* Count of times the seek policy was dynamically changed
* in an input stream.
* Value: {@value}.
*/
public static final String STREAM_READ_SEEK_POLICY_CHANGED =
"stream_read_seek_policy_changed";
/**
* Count of seek operations in an input stream.
* Value: {@value}.
*/
public static final String STREAM_READ_SEEK_OPERATIONS =
"stream_read_seek_operations";
/**
* Count of {@code InputStream.skip()} calls.
* Value: {@value}.
*/
public static final String STREAM_READ_SKIP_OPERATIONS =
"stream_read_skip_operations";
/**
* Count bytes skipped in {@code InputStream.skip()} calls.
* Value: {@value}.
*/
public static final String STREAM_READ_SKIP_BYTES =
"stream_read_skip_bytes";
/**
* Total count of bytes read from an input stream.
* Value: {@value}.
*/
public static final String STREAM_READ_TOTAL_BYTES
= "stream_read_total_bytes";
/**
* Count of calls of {@code CanUnbuffer.unbuffer()}.
* Value: {@value}.
*/
public static final String STREAM_READ_UNBUFFERED
= "stream_read_unbuffered";
/**
* "Count of stream write failures reported.
* Value: {@value}.
*/
public static final String STREAM_WRITE_EXCEPTIONS =
"stream_write_exceptions";
/**
* Count of failures when finalizing a multipart upload:
* {@value}.
*/
public static final String STREAM_WRITE_EXCEPTIONS_COMPLETING_UPLOADS =
"stream_write_exceptions_completing_upload";
/**
* Count of block/partition uploads complete.
* Value: {@value}.
*/
public static final String STREAM_WRITE_BLOCK_UPLOADS
= "stream_write_block_uploads";
/**
* Count of number of block uploads aborted.
* Value: {@value}.
*/
public static final String STREAM_WRITE_BLOCK_UPLOADS_ABORTED
= "stream_write_block_uploads_aborted";
/**
* Count of block/partition uploads active.
* Value: {@value}.
*/
public static final String STREAM_WRITE_BLOCK_UPLOADS_ACTIVE
= "stream_write_block_uploads_active";
/**
* Gauge of data queued to be written.
* Value: {@value}.
*/
public static final String STREAM_WRITE_BLOCK_UPLOADS_BYTES_PENDING =
"stream_write_block_uploads_data_pending";
/**
* Count of number of block uploads committed.
* Value: {@value}.
*/
public static final String STREAM_WRITE_BLOCK_UPLOADS_COMMITTED
= "stream_write_block_uploads_committed";
/**
* Gauge of block/partitions uploads queued to be written.
* Value: {@value}.
*/
public static final String STREAM_WRITE_BLOCK_UPLOADS_PENDING
= "stream_write_block_uploads_pending";
/**
* "Count of bytes written to output stream including all not yet uploaded.
* {@value}.
*/
public static final String STREAM_WRITE_BYTES
= "stream_write_bytes";
/**
* Count of total time taken for uploads to complete.
* {@value}.
*/
public static final String STREAM_WRITE_TOTAL_TIME
= "stream_write_total_time";
/**
* Total queue duration of all block uploads.
* {@value}.
*/
public static final String STREAM_WRITE_QUEUE_DURATION
= "stream_write_queue_duration";
public static final String STREAM_WRITE_TOTAL_DATA
= "stream_write_total_data";
/**
* Number of bytes to upload from an OutputStream.
*/
public static final String BYTES_TO_UPLOAD
= "bytes_upload";
/**
* Number of bytes uploaded successfully to the object store.
*/
public static final String BYTES_UPLOAD_SUCCESSFUL
= "bytes_upload_successfully";
/**
* Number of bytes failed to upload to the object store.
*/
public static final String BYTES_UPLOAD_FAILED
= "bytes_upload_failed";
/**
* Total time spent on waiting for a task to complete.
*/
public static final String TIME_SPENT_ON_TASK_WAIT
= "time_spent_task_wait";
/**
* Number of task queue shrunk operations.
*/
public static final String QUEUE_SHRUNK_OPS
= "queue_shrunk_ops";
/**
* Number of times current buffer is written to the service.
*/
public static final String WRITE_CURRENT_BUFFER_OPERATIONS
= "write_current_buffer_ops";
/**
* Total time spent on completing a PUT request.
*/
public static final String TIME_SPENT_ON_PUT_REQUEST
= "time_spent_on_put_request";
/**
* Number of seeks in buffer.
*/
public static final String SEEK_IN_BUFFER
= "seek_in_buffer";
/**
* Number of bytes read from the buffer.
*/
public static final String BYTES_READ_BUFFER
= "bytes_read_buffer";
/**
* Total number of remote read operations performed.
*/
public static final String REMOTE_READ_OP
= "remote_read_op";
/**
* Total number of bytes read from readAhead.
*/
public static final String READ_AHEAD_BYTES_READ
= "read_ahead_bytes_read";
/**
* Total number of bytes read from remote operations.
*/
public static final String REMOTE_BYTES_READ
= "remote_bytes_read";
/**
* Total number of Data blocks allocated by an outputStream.
*/
public static final String BLOCKS_ALLOCATED
= "blocks_allocated";
/**
* Total number of Data blocks released by an outputStream.
*/
public static final String BLOCKS_RELEASED
= "blocks_released";
/**
* Total number of prefetching operations executed.
*/
public static final String STREAM_READ_PREFETCH_OPERATIONS
= "stream_read_prefetch_operations";
/**
* Total number of block in disk cache.
*/
public static final String STREAM_READ_BLOCKS_IN_FILE_CACHE
= "stream_read_blocks_in_cache";
/**
* Total number of active prefetch operations.
*/
public static final String STREAM_READ_ACTIVE_PREFETCH_OPERATIONS
= "stream_read_active_prefetch_operations";
/**
* Total bytes of memory in use by this input stream.
*/
public static final String STREAM_READ_ACTIVE_MEMORY_IN_USE
= "stream_read_active_memory_in_use";
/**
* count/duration of reading a remote block.
*
* Value: {@value}.
*/
public static final String STREAM_READ_REMOTE_BLOCK_READ
= "stream_read_block_read";
/**
* count/duration of acquiring a buffer and reading to it.
*
* Value: {@value}.
*/
public static final String STREAM_READ_BLOCK_ACQUIRE_AND_READ
= "stream_read_block_acquire_read";
/**
* Total number of blocks evicted from the disk cache.
*/
public static final String STREAM_EVICT_BLOCKS_FROM_FILE_CACHE
= "stream_evict_blocks_from_cache";
/**
* Track duration of LRU cache eviction for disk cache.
*/
public static final String STREAM_FILE_CACHE_EVICTION
= "stream_file_cache_eviction";
private StreamStatisticNames() {
}
}
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