hy00nc opened a new pull request #222: [NEMO-350] Implement Off-heap 
SerializedMemoryStore & [NEMO-384] Implement DirectByteBufferInputStream for 
Off-heap SerializedMemoryStore
URL: https://github.com/apache/incubator-nemo/pull/222
 
 
   JIRA: [NEMO-350: Implement Off-heap 
SerializedMemoryStore](https://issues.apache.org/jira/projects/NEMO/issues/NEMO-#350)
   [NEMO-384: Implement DirectByteBufferInputStream for Off-heap 
SerializedMemoryStore](https://issues.apache.org/jira/projects/NEMO/issues/NEMO-#384)
   
   **Major changes:**
   - When a block is emitted by an executor, we write it directly to off-heap 
memory using `DirectByteBufferOutputStream` and `DirectByteBufferOutputStream`.
   
   **Minor changes to note:**
   - If there is any chance of using `getData()` in `SerializedPartition`, we 
check the length of the `SerializedData` to ensure that this 
`SerializedPartition` was created from existing data.
   

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