Hyukjin Kwon created SPARK-21326:
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Summary: Use TextFileFormat in implementation of LibSVMFileFormat
Key: SPARK-21326
URL: https://issues.apache.org/jira/browse/SPARK-21326
Project: Spark
Issue Type: Improvement
Components: ML, SQL
Affects Versions: 2.3.0
Reporter: Hyukjin Kwon
This is related with SPARK-19918 and SPARK-18362.
There are three points here:
- The main advantage of this change was file-listing bottlenecks in driver side
and I guess this does not applies to LibSVM datasource for the current state as
it requires the file should be single.
As a side note, it looks possible with multiple files - SPARK-21066 but it is
still in discussion
- Another advantage is ones from using {{FileScanRDD}}. For example, I guess we
can use {{spark.sql.files.ignoreCorruptFiles}} option if we allow multiple
files in schema inference.
- We can unify the schema inference code path in text based data sources. This
is also a preparation for SPARK-21289.
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