URI of LMDB databases
# of the desired partitions.
spark context
(Since version 1.0.0) use mapPartitionsWithIndex and filter
(Since version 1.0.0) use mapPartitionsWithIndex and flatMap
(Since version 1.0.0) use mapPartitionsWithIndex and foreach
(Since version 1.2.0) use TaskContext.get
(Since version 0.7.0) use mapPartitionsWithIndex
(Since version 1.0.0) use mapPartitionsWithIndex
(Since version 1.0.0) use collect
LmdbRDD is a custom RDD for accessing LMDB databases using a specified # of partitions.