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https://issues.apache.org/jira/browse/SPARK-3091?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Patrick Wendell updated SPARK-3091:
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Priority: Blocker (was: Major)
> Add support for caching metadata on Parquet files
> -------------------------------------------------
>
> Key: SPARK-3091
> URL: https://issues.apache.org/jira/browse/SPARK-3091
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Reporter: Matei Zaharia
> Assignee: Matei Zaharia
> Priority: Blocker
>
> For larger Parquet files, reading the file footers (which is done in parallel
> on up to 5 threads) and HDFS block locations (which is serial) can take
> multiple seconds. We can add an option to cache this data within
> FilteringParquetInputFormat. Unfortunately ParquetInputFormat only caches
> footers within each instance of ParquetInputFormat, not across them.
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