use HDFSiterator;

Iterators for distributed iteration over Hadoop Distributed Filesystem


This module is currently not working. See #12627 to track progress.

Iterators that can iterate over distributed data in an HDFS filesystem in a distributed manner. See HDFS.

iter HDFSiter(path: string, type rec, regex: string)

Iterate through an HDFS file (available in the default configured HDFS server) and yield records matching a regular expression.

Serial and leader-follower versions of this iterator are available.

  • path -- the path to the file within the HDFS server
  • rec -- the type of the records to return
  • regexp -- a regular expression with the same number of captures as the number of fields in the record type rec