check the validity of the source specification
check the validity of the source specification
configure the source.
configure the source.
the InputFormat specifying the type of input for this source
the InputFormat specifying the type of input for this source
the size in bytes of the data being input by this source
map the key-values of a source's InputFormat to the final type produced by it
map the key-values of a source's InputFormat to the final type produced by it
a unique id for this source
DataSource for a computation graph.
It reads key-values (K, V) from the file system and uses an input converter to create a type A of input