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Type:
Improvement
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Status: Closed
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: 3.0.0-alpha1
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Fix Version/s: 2.6.0
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Component/s: hdfs-client
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Labels:None
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Target Version/s:
BlockReaderLocal must allow zero-copy reads only when the DN believes it's valid. This implies adding a new field to the response to REQUEST_SHORT_CIRCUIT_FDS. We also need some kind of heartbeat from the client to the DN, so that the DN can inform the client when the mapped region is no longer locked into memory.