Facility to query serializable types such as Writables for 'raw length'
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Key: HADOOP-3414
URL: https://issues.apache.org/jira/browse/HADOOP-3414
Project: Hadoop Core
Issue Type: Improvement
Components: io
Reporter: Arun C Murthy
Currently we need to jump through hoops to get the 'raw length' of serializable
types for e.g. SequenceFile.Writer.append needs to copy the key/value into a
buffer and then check the buffer's size to figure the record/key/value lenghts.
Obviously this can be improved to do away with the extra copy if we had types
which could be queried for it's raw-length.
Thoughts?
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