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https://issues.apache.org/jira/browse/SPARK-21326?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon updated SPARK-21326:
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Description:
This is related with SPARK-19918 and SPARK-18362.
There are three points here:
- The main advantage of this change was removing 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.
was:
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.
> 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 removing 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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