sam created SPARK-22225:
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Summary: wholeTextFilesIterators
Key: SPARK-22225
URL: https://issues.apache.org/jira/browse/SPARK-22225
Project: Spark
Issue Type: New Feature
Components: Spark Core
Affects Versions: 2.2.0
Reporter: sam
It is a very common use case to want to preserve a path -> file mapping in an
RDD, or read an entire file in one go. Especially for unstructured data and
ETL.
Currently wholeTextFiles is the goto method for this, but it read the entire
file into memory, which is sometimes an issue (see SPARK-18965). It also
precludes the option to lazily process files.
It would be nice to have a method with the following signature:
{code}
def wholeTextFilesIterators(
path: String,
minPartitions: Int = defaultMinPartitions,
delimiter: String = "\n"): RDD[(String, Iterator[String])]
{code}
Where each `Iterator[String]` is a lazy file iterator where each string is
delimited by the `delimiter` field.
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