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[HDFS-11310] Reduce the performance impact of the balancer (trunk port)
...HDFS-7967 introduced a highly performant balancer getBlocks() query that scales to large/dense clusters. The simple design implementation depends on the triplets data structure. ...
, 2017-06-30, 00:49
[HDFS-5239] Allow FSNamesystem lock fairness to be configurable
...The fairness of the FSNamesystem#fsLock is hardcoded to true. Using an unfair lock provides a negligible increase to throughput. However this is due to bottlenecks elsewhere in t...
, 2017-06-15, 05:27
[HDFS-8498] Blocks can be committed with wrong size
...When an IBR for a UC block arrives, the NN updates the expected location's block and replica state only if it's on an unexpected storage for an expected DN. If it's for an expected sto...
, 2017-06-07, 22:59
[HDFS-11648] Lazy construct the IIP pathname
...The IIP pathname is a string constructed from the byte components. If the pathname will never be accessed, ex. processing listStatus children, building the path is unnecessarily ex...
, 2017-06-07, 22:59
[HDFS-10619] Cache path in InodesInPath
...INodesInPath#getPath, a frequently called method, dynamically builds the path. IIP should cache the path upon construction....
, 2017-05-31, 18:46
[HDFS-8674] Improve performance of postponed block scans
...When a standby goes active, it marks all nodes as "stale" which will cause block invalidations for over-replicated blocks to be queued until full block reports are received from the nodes wi...
, 2017-05-27, 02:05
[HDFS-7990] IBR delete ack should not be delayed
...HDFS-395 added the incremental BR feature. A concern was avoiding a race condition with ack-ing block invalidates followed by the directory scanner re-adding the block before the async...
, 2017-05-18, 07:39
[HDFS-8492] DN should notify NN when client requests a missing block
...If the DN has a block its volume map but not on-disk, it tells clients it's an invalid block id. The NN is not informed of the missing block until either the bp slice scanner or the di...
, 2017-04-27, 14:05
[HDFS-4389] Non-HA DFSClients do not attempt reconnects
...The HA retry policy implementation appears to have broken non-HA DFSClient connect retries. The ipc Client.Connection#handleConnectionFailure used to perform 45 connection attempts, bu...
, 2017-03-31, 05:48
[HDFS-4493] webhdfs fails after SPNEGO token expires
...Webhdfs assumes that SPNEGO's AuthenticationException is always fatal. The exception is thrown if authentication truly fails due to bad credentials, but it's also thrown when the auth ...
, 2017-03-31, 05:33
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