[jira] [Created] (SPARK-21326) Use TextFileFormat in implementation of LibSVMFileFormat

["Hyukjin Kwon (JIRA)" <ji...@apache.org>]

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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