hadoop/hadoop-hdfs-project/hadoop-hdfs/CHANGES-HDFS-4949.txt

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Hadoop HDFS Change Log for HDFS-4949
HDFS-4949 (Unreleased)
INCOMPATIBLE CHANGES
NEW FEATURES
IMPROVEMENTS
HDFS-5049. Add JNI mlock support. (Andrew Wang via Colin Patrick McCabe)
HDFS-5051. Propagate cache status information from the DataNode to the
NameNode (Andrew Wang via Colin Patrick McCabe)
HDFS-5052. Add cacheRequest/uncacheRequest support to NameNode.
(contributed by Colin Patrick McCabe)
HDFS-5050. Add DataNode support for mlock and munlock
(Andrew Wang via Colin Patrick McCabe)
HDFS-5141. Add cache status information to datanode heartbeat.
(Contributed by Andrew Wang)
HDFS-5121. Add RPCs for creating and manipulating cache pools.
(Contributed by Colin Patrick McCabe)
HDFS-5163. Miscellaneous cache pool RPC fixes. (Contributed by Colin
Patrick McCabe)
HDFS-5120. Add command-line support for manipulating cache pools.
(Contributed by Colin Patrick McCabe)
HDFS-5158. Add command-line support for manipulating cache directives.
(Contributed by Colin Patrick McCabe)
HDFS-5053. NameNode should invoke DataNode APIs to coordinate caching.
(Andrew Wang)
HDFS-5197. Document dfs.cachereport.intervalMsec in hdfs-default.xml.
(cnauroth)
HDFS-5213. Separate PathBasedCacheEntry and PathBasedCacheDirectiveWithId.
(Contributed by Colin Patrick McCabe)
HDFS-5236. Change PathBasedCacheDirective APIs to be a single value
rather than batch. (Contributed by Andrew Wang)
HDFS-5191. Revisit zero-copy API in FSDataInputStream to make it more
intuitive. (Contributed by Colin Patrick McCabe)
HDFS-5119. Persist CacheManager state in the edit log.
(Contributed by Andrew Wang)
HDFS-5190. Move cache pool related CLI commands to CacheAdmin.
(Contributed by Andrew Wang)
HDFS-5304. Expose if a block replica is cached in getFileBlockLocations.
(Contributed by Andrew Wang)
HDFS-5224. Refactor PathBasedCache* methods to use a Path rather than a
String. (cnauroth)
HDFS-5358. Add replication field to PathBasedCacheDirective.
(Contributed by Colin Patrick McCabe)
HDFS-5359. Allow LightWeightGSet#Iterator to remove elements.
(Contributed by Colin Patrick McCabe)
HDFS-5096. Automatically cache new data added to a cached path.
(Contributed by Colin Patrick McCabe)
OPTIMIZATIONS
HDFS-5349. DNA_CACHE and DNA_UNCACHE should be by blockId only. (cmccabe)
BUG FIXES
HDFS-5169. hdfs.c: translateZCRException: null pointer deref when
translating some exceptions. (Contributed by Colin Patrick McCabe)
HDFS-5198. NameNodeRpcServer must not send back DNA_FINALIZE in reply to a
cache report. (Contributed by Colin Patrick McCabe)
HDFS-5195. Prevent passing null pointer to mlock and munlock. (cnauroth)
HDFS-5201. NativeIO: consolidate getrlimit into NativeIO#getMemlockLimit
(Contributed by Colin Patrick McCabe)
HDFS-5210. Fix some failing unit tests on HDFS-4949 branch.
(Contributed by Andrew Wang)
HDFS-5266. ElasticByteBufferPool#Key does not implement equals. (cnauroth)
HDFS-5309. Fix failing caching unit tests. (Andrew Wang)
HDFS-5314. Do not expose CachePool type in AddCachePoolOp (Colin Patrick
McCabe)
HDFS-5348. Fix error message when dfs.datanode.max.locked.memory is
improperly configured. (Colin Patrick McCabe)
HDFS-5373. hdfs cacheadmin -addDirective short usage does not mention
-replication parameter. (cnauroth)
HDFS-5383. fix broken caching unit tests. (Andrew Wang)
HDFS-5388. Loading fsimage fails to find cache pools during namenode
startup. (Chris Nauroth via Colin Patrick McCabe)