ExtensionMethodsWriteWebHdfsBinaryTOutput Method (StreamTOutput, Epoch, String, Int32, Uri, Int32, Int64, Int64)Naiad Help

[This is preliminary documentation and is subject to change.]

method to write a stream of records to a collection of HDFS files using the default Naiad binary serializer. The collection is active throughout the computation and is closed when the computation terminates: it concatenates records from all epochs in an undefined order

Namespace: Microsoft.Research.Naiad.Frameworks.WebHdfs
Assembly: Microsoft.Research.Naiad.WebHdfsSupport (in Microsoft.Research.Naiad.WebHdfsSupport.dll) Version: 0.5.0.0 (0.5.0.0)
Syntax

C#
public static Subscription WriteWebHdfsBinary<TOutput>(
	this Stream<TOutput, Epoch> source,
	string user,
	int webPort,
	Uri prefix,
	int bufferSize = 1048576,
	long blockSize = -1,
	long segmentThreshold = 266338304
)

Parameters

source
Type: Microsoft.Research.NaiadStreamTOutput, Epoch
stream of records to write
user
Type: SystemString
hdfs user
webPort
Type: SystemInt32
webhdfs protocol port
prefix
Type: SystemUri
webhdfs directory to write the partitioned data into
bufferSize (Optional)
Type: SystemInt32
buffer size to use in the serializer
blockSize (Optional)
Type: SystemInt64
hdfs block size to use, or -1 for the file system default value
segmentThreshold (Optional)
Type: SystemInt64
file size to write before closing the file and opening another one

Type Parameters

TOutput
type of the records to write

Return Value

Type: Subscription
handle to wait on until the computation completes

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type StreamTOutput, Epoch. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
See Also

Reference