TaskMetrics Class

Provides information about the read and write operations done by a task.

Inheritance Hierarchy

SystemObject
Ookii.Jumbo.JetTaskMetrics

Namespace: Ookii.Jumbo.Jet
Assembly: Ookii.Jumbo.Jet (in Ookii.Jumbo.Jet.dll) Version: 0.3.0+dc1307f20e065bb638e0b73a34cd216f57e486f1

Syntax

C++

Copy

public sealed class TaskMetrics : IWritable

Public NotInheritable Class TaskMetrics
	Implements IWritable

public ref class TaskMetrics sealed : IWritable

[<SealedAttribute>]
type TaskMetrics = 
    class
        interface IWritable
    end

The TaskMetrics type exposes the following members.

Constructors

	Name	Description
	TaskMetrics	Initializes a new instance of the TaskMetrics class

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Properties

	Name	Description
	DfsBytesRead	Gets or sets the number of bytes read from the Distributed File System.
	DfsBytesWritten	Gets or sets the number of bytes written to the Distributed File System.
	DiscardedPartitions	Gets or sets the number of partitions that were discarded because the had been reassigned to another task.
	DynamicallyAssignedPartitions	Gets or sets the number of partitions that the task received through dynamic partition assignment.
	InputBytes	Gets or sets the number of bytes that this task had as input.
	InputRecords	Gets or sets the number of records read.
	LocalBytesRead	Gets or sets the number of bytes read from the local disk.
	LocalBytesWritten	Gets or sets the number of bytes written to the local disk.
	NetworkBytesRead	Gets or sets the number of bytes read over the network by the file and TCP channels.
	NetworkBytesWritten	Gets or sets the number of bytes written over the network by the TCP channel.
	OutputBytes	Gets or sets the number of bytes that this task had as output.
	OutputRecords	Gets or sets the number of records written.

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Methods

	Name	Description
	Add	Adds the value of the specified TaskMetrics instance to this instance.
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object)
	FromXml	Creates a TaskMetrics instance from an XML element.
	GetHashCode	Serves as the default hash function. (Inherited from Object)
	GetType	Gets the Type of the current instance. (Inherited from Object)
	LogMetrics	Writes the metrics to the log.
	Read	Reads the object from the specified reader.
	ToString	Returns a string representation of the TaskMetrics object. (Overrides ObjectToString)
	ToXml	Returns the value of this TaskMetrics object as an XElement.
	Write	Writes the object to the specified writer.

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Remarks

The InputRecords, InputBytes, OutputRecords and OutputBytes properties provide information about the amount of data processed and generated by this task. They do not take compression or the source or destination of the data into account.

The remaining properties provide information about the amount of I/O activity performed by the task. For instance LocalBytesRead tells you how much data was read from the local disk. This can include data that was first written to the disk by a channel or record reader and then read again. Because of this and things like compression, this number doesn't need to match InputBytes.

Reference

Ookii.Jumbo.Jet Namespace