[jira] [Created] (TEZ-4029) tez-api: InputDataInformationEvent: decouple payload storage from access

["Adrian Nicoara (JIRA)" <ji...@apache.org>]

Adrian Nicoara created TEZ-4029:
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             Summary: tez-api: InputDataInformationEvent: decouple payload storage from access
                 Key: TEZ-4029
                 URL: https://issues.apache.org/jira/browse/TEZ-4029
             Project: Apache Tez
          Issue Type: Improvement
            Reporter: Adrian Nicoara
         Attachments: 0001-tez-api-InputDataInformationEvent-decouple-payload-s.patch

The current InputDataInformationEvent has different fields, constructors and
 methods of access for a payload, depending on whether it is stored in Object
 form, or if it is stored as a serialized payload within a ByteBuffer.
 
 This can be simplified to having a single Object reference to the payload.
 Access, at runtime, checks if the payload has to be (de)serialized, depending on
 which method is used, and what is stored.
 
 In addition to the one reference that this saves in the
 InputDataInformationEvent, user code can leverage the deserialized storage
 format, to reduce the footprint associated with the same payload being used
 across different events within the AM.



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