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Cache FileStatus in Footer to reduce redundant NameNode RPC calls #3394

@wangyum

Description

@wangyum

Describe the enhancement requested

Optimization reduces redundant getFileStatus() RPC calls to the NameNode
when processing Parquet files.

Benefits:

  • Reduces NameNode RPC calls by 1 per Parquet file during split generation
  • For workloads with thousands of small files, this can significantly reduce
      NameNode pressure and improve job startup time
  • Maintains full backward compatibility with existing code paths

Component(s)

Core

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