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Loader - Data Transformation - Coggle Diagram

- - - - refers to those that does not meet Loader conversion rules, which can be checked with the following steps
        
        Dirty Data is stored in HDFS , and generated by each Map job is stored in a separate file
  - - - Describes the process of extracting transforming and loading data from the data source to the target end.
        it includes data source location and attriutes , rules for source2target data conversion , and targetend attributes
      - If a Mapper task fails after Loader submits a job to YARN for execution, the task can be automatically retried.
  - - - Web UI
      - Linux CLI
      - REST API
      - Java API