[This is preliminary documentation and is subject to change.]
Read 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.Hdfs
Assembly: Microsoft.Research.Naiad.HdfsSupport (in Microsoft.Research.Naiad.HdfsSupport.dll) Version: 0.5.0.0 (0.5.0.0)
Syntax
C#
public static Stream<TOutput, Epoch> ReadHdfsCollection<TOutput>( this Computation manager, Uri fileOrDirectoryPath, Func<Stream, IEnumerable<ArraySegment<TOutput>>> deserialize )
Parameters
- manager
- Type: Microsoft.Research.NaiadComputation
Naiad computation - fileOrDirectoryPath
- Type: SystemUri
path of the file or directory to read - deserialize
- Type: SystemFuncStream, IEnumerableArraySegmentTOutput
custom deserializer function to convert a stream of bytes into a sequence of records
Type Parameters
- TOutput
- output record type
Return Value
Type: StreamTOutput, Epochstream 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 Computation. 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