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[HDFS-8072] Reserved RBW space is not released if client terminates while writing block
...The DataNode reserves space for a full block when creating an RBW block (introduced in HDFS-6898).The reserved space is released incrementally as data is written to disk and fully when the b...
, 2015-09-02, 04:44
[HDFS-7596] NameNode should prune dead storages from storageMap
...The NameNode must be able to prune storages that are no longer reported by the DataNode and that have no blocks associated. These stale storages can skew the balancer behavior.Detailed discu...
, 2015-08-31, 19:37
[HDFS-8983] NameNode support for protected directories
...To protect important system directories from inadvertent deletion (e.g. /Users) the NameNode can allow marking directories as protected. Such directories cannot be deleted unless they are em...
, 2015-08-29, 21:58
[HDFS-5851] Support memory as a storage medium
...Memory can be used as a storage medium for smaller/transient files for fast write throughput.More information/design will be added later....
, 2015-08-25, 08:07
[HDFS-7649] Multihoming docs should emphasize using hostnames in configurations
...The docs should emphasize that master and slave configurations should hostnames wherever possible.Link to current docs: https://hadoop.apache.org/docs/r2.6.0/hadoop-project-dist/hadoop-hdfs/...
, 2015-08-14, 21:22
[HDFS-8815] DFS getStoragePolicy implementation using single RPC call
...HADOOP-12161 introduced a new FileSystem#getStoragePolicy call. The DFS implementation of the call requires two RPC calls, the first to fetch the storage policy ID and the second to fetch th...
, 2015-08-11, 07:10
[HDFS-8856] Make LeaseManager#countPath O(1)
...LeaseManager#countPath loops over all existing lease holders to compute the pending lease count. We can just track the pending leased files so it runs in constant time....
, 2015-08-07, 15:33
[HDFS-7192] DN should ignore lazyPersist hint if the writer is not local
...The DN should ignore allowLazyPersist hint to DataTransferProtocol#writeBlock if the writer is not local.Currently we don't restrict memory writes to local clients. For in-cluster clients th...
, 2015-07-31, 16:47
[HDFS-6931] Move lazily persisted replicas to finalized directory on DN startup
...On restart the DN should move replicas from the current/lazyPersist/ directory to current/finalized. Duplicate replicas of the same block should be deleted from RAM disk....
, 2015-07-20, 17:59
[HDFS-8778] TestBlockReportRateLimiting#testLeaseExpiration can deadlock
...requestBlockReportLease blocks on DataNode registration while holding the NameSystem read lock.DataNode registration can block on the NameSystem read lock if a writer gets in the queue....
, 2015-07-17, 14:09
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