[WIP] Add experimental BalancedParquetEngine implementation #80
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WARNING: This PR is still very rough, but I am sharing it now in case others wish to experiment (and/or share feedback)
May address parts of NVIDIA-Merlin/NVTabular#1340
This PR currently adds a
balance_partitions=
option to theDataset
API, which ultimately uses a newBalancedParquetEngine
implementation forengine="parquet"
. The primary goal of this engine is to generate an underlying Dask DataFrame collection with an equivalent row count in every partition. The user may manually specify this desired row count (withrows_per_partition
), or they can pass in the usualpart_size
orpart_mem_fraction
.An additional option is to specify a desired
batch_size
to align with. If thebatch_size
argument is specified, the output partition sizes will always be divisible by this number.TODO: