hadoop/hadoop-hdfs-project/hadoop-hdfs/CHANGES_HDFS-2832.txt

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BREAKDOWN OF HDFS-2832 ENABLE SUPPORT FOR HETEROGENEOUS STORAGES IN HDFS
IMPROVEMENTS:
HDFS-4985. Add storage type to the protocol and expose it in block report
and block locations. (Arpit Agarwal)
HDFS-5115. Make StorageID a UUID. (Arpit Agarwal)
HDFS-5000. DataNode configuration should allow specifying storage type.
(Arpit Agarwal)
HDFS-4987. Namenode changes to track multiple storages per datanode.
(szetszwo)
HDFS-5154. Fix TestBlockManager and TestDatanodeDescriptor after HDFS-4987.
(Junping Du via szetszwo)
HDFS-5009. Include storage information in the LocatedBlock. (szetszwo)
HDFS-5134. Move blockContentsStale, heartbeatedSinceFailover and
firstBlockReport from DatanodeDescriptor to DatanodeStorageInfo; and
fix a synchronization problem in DatanodeStorageInfo. (szetszwo)
HDFS-5157. Add StorageType to FsVolume. (Junping Du via szetszwo)
HDFS-4990. Change BlockPlacementPolicy to choose storages instead of
datanodes. (szetszwo)
HDFS-5232. Protocol changes to transmit StorageUuid. (Arpit Agarwal)
HDFS-5233. Use Datanode UUID to identify Datanodes. (Arpit Agarwal)
HDFS-5222. Move block schedule information from DatanodeDescriptor to
DatanodeStorageInfo. (szetszwo)
HDFS-4988. Datanode must support all the volumes as individual storages.
(Arpit Agarwal)
HDFS-5377. Heartbeats from Datandode should include one storage report
per storage directory. (Arpit Agarwal)
HDFS-5398. NameNode changes to process storage reports per storage
directory. (Arpit Agarwal)
HDFS-5390. Send one incremental block report per storage directory.
(Arpit Agarwal)
HDFS-5401. Fix NPE in Directory Scanner. (Arpit Agarwal)
HDFS-5417. Fix storage IDs in PBHelper and UpgradeUtilities. (szetszwo)
HDFS-5214. Fix NPEs in BlockManager and DirectoryScanner. (Arpit Agarwal)
HDFS-5435. File append fails to initialize storageIDs. (Junping Du via
Arpit Agarwal)
HDFS-5437. Fix TestBlockReport and TestBPOfferService failures. (Arpit
Agarwal)
HDFS-5447. Fix TestJspHelper. (Arpit Agarwal)
HDFS-5452. Fix TestReplicationPolicy and TestBlocksScheduledCounter.
HDFS-5448. Datanode should generate its ID on first registration. (Arpit
Agarwal)