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@@ -18,6 +18,9 @@ Trunk (Unreleased)
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HDFS-3125. Add JournalService to enable Journal Daemon. (suresh)
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+ HDFS-6581. Support writing to a single replica in RAM. (See breakdown of
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+ tasks below for features and contributors).
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+
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IMPROVEMENTS
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HDFS-4665. Move TestNetworkTopologyWithNodeGroup to common.
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@@ -258,6 +261,103 @@ Trunk (Unreleased)
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HDFS-6981. Fix DN upgrade with layout version change. (Arpit Agarwal)
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+ BREAKDOWN OF HDFS-6581 SUBTASKS AND RELATED JIRAS
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+
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+ HDFS-6921. Add LazyPersist flag to FileStatus. (Arpit Agarwal)
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+
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+ HDFS-6924. Add new RAM_DISK storage type. (Arpit Agarwal)
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+
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+ HDFS-6922. Add LazyPersist flag to INodeFile, save it in FsImage and
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+ edit logs. (Arpit Agarwal)
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+
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+ HDFS-6923. Propagate LazyPersist flag to DNs via DataTransferProtocol.
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+ (Arpit Agarwal)
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+
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+ HDFS-6925. DataNode should attempt to place replicas on transient storage
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+ first if lazyPersist flag is received. (Arpit Agarwal)
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+
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+ HDFS-6926. DN support for saving replicas to persistent storage and
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+ evicting in-memory replicas. (Arpit Agarwal)
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+
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+ HDFS-6927. Initial unit tests for lazy persist files. (Arpit Agarwal)
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+
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+ HDFS-6929. NN periodically unlinks lazy persist files with missing
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+ replicas from namespace. (Arpit Agarwal)
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+
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+ HDFS-6928. 'hdfs put' command should accept lazyPersist flag for testing.
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+ (Arpit Agarwal)
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+
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+ HDFS-6960. Bugfix in LazyWriter, fix test case and some refactoring.
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+ (Arpit Agarwal)
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+
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+ HDFS-6931. Move lazily persisted replicas to finalized directory on DN
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+ startup. (Arpit Agarwal)
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+
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+ HDFS-6950. Add Additional unit tests for HDFS-6581. (Xiaoyu Yao via
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+ Arpit Agarwal)
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+
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+ HDFS-6930. Improve replica eviction from RAM disk. (Arpit Agarwal)
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+
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+ HDFS-6977. Delete all copies when a block is deleted from the block space.
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+ (Arpit Agarwal)
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+
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+ HDFS-6991. Notify NN of evicted block before deleting it from RAM disk.
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+ (Arpit Agarwal)
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+
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+ HDFS-6978. Directory scanner should correctly reconcile blocks on RAM
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+ disk. (Arpit Agarwal)
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+
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+ HDFS-7066. LazyWriter#evictBlocks misses a null check for replicaState.
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+ (Xiaoyu Yao via Arpit Agarwal)
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+
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+ HDFS-7064. Fix unit test failures in HDFS-6581 branch. (Xiaoyu Yao via
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+ Arpit Agarwal)
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+
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+ HDFS-6581. Few more unit test fixes for HDFS-6581. (Arpit Agarwal)
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+
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+ HDFS-7080. Fix finalize and upgrade unit test failures. (Arpit Agarwal)
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+
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+ HDFS-7084. FsDatasetImpl#copyBlockFiles debug log can be improved.
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+ (Xiaoyu Yao via Arpit Agarwal)
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+
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+ HDFS-7091. Add forwarding constructor for INodeFile for existing callers.
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+ (Arpit Agarwal)
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+
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+ HDFS-7100. Make eviction scheme pluggable. (Arpit Agarwal)
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+
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+ HDFS-7108. Fix unit test failures in SimulatedFsDataset. (Arpit Agarwal)
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+
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+ HDFS-7071. Updated editsStored and editsStored.xml to bump layout
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+ version and add LazyPersist flag. (Xiaoyu Yao and Arpit Agarwal via
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+ Arpit Agarwal)
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+
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+ HDFS-6990. Add unit test for evict/delete RAM_DISK block with open
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+ handle. (Xiaoyu Yao via Arpit Agarwal)
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+
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+ HDFS-7143. Fix findbugs warnings in HDFS-6581 branch. (szetszwo via
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+ Arpit Agarwal)
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+
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+ HDFS-6932. Balancer and Mover tools should ignore replicas on RAM_DISK.
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+ (Xiaoyu Yao via Arpit Agarwal)
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+
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+ HDFS-7144. Fix findbugs warnings in RamDiskReplicaTracker. (szetszwo via
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+ Arpit Agarwal)
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+
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+ HDFS-7155. Bugfix in createLocatedFileStatus caused by bad merge.
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+ (Arpit Agarwal)
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+
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+ HDFS-7153. Add storagePolicy to NN edit log during file creation.
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+ (Arpit Agarwal)
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+
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+ HDFS-7159. Use block storage policy to set lazy persist preference.
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+ (Arpit Agarwal)
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+
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+ HDFS-7129. Metrics to track usage of memory for writes. (Xiaoyu Yao
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+ via Arpit Agarwal)
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+
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+ HDFS-7171. Fix Jenkins failures in HDFS-6581 branch. (Arpit Agarwal)
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+
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+
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Release 2.7.0 - UNRELEASED
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INCOMPATIBLE CHANGES
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arp