[This is preliminary documentation and is subject to change.]
Read a stream of path names (file or directory names) each of which corresponds to a collection of HDFS files
serialized in a custom binary format. Concatenate all the records to the output, in an unspecified 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 Stream<TOutput, TTime> FromWebHdfs<TOutput, TTime>( this Stream<Uri, TTime> input, Func<Stream, IEnumerable<ArraySegment<TOutput>>> deserialize, string user, int webPort ) where TTime : Object, Time<TTime>
Parameters
- input
- Type: Microsoft.Research.NaiadStreamUri, TTime
stream of input paths - deserialize
- Type: SystemFuncStream, IEnumerableArraySegmentTOutput
custom deserializer function to convert a stream of bytes into a sequence of records - user
- Type: SystemString
hdfs user - webPort
- Type: SystemInt32
webhdfs protocol port
Type Parameters
- TOutput
- output record type
- TTime
- time of the input and output records
Return Value
Type: StreamTOutput, TTimestream of records in the hdfs files
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type StreamUri, TTime. 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