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[HDFS-5453] Support fine grain locking in FSNamesystem
...The namesystem currently uses a course grain lock to control access. This prevents concurrent writers in different branches of the tree, and prevents readers from accessing branches th...
, 2018-03-19, 08:17
[VOTE] Merging branch HDFS-7240 to trunk
- [mail # dev]
...I’m generally neutral and looked foremost at developer impact. Ie. Willit be so intertwined with hdfs that each project risks destabilizing theother? Will developers with n...
, 2018-03-02, 01:33
[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. ...
, 2018-02-14, 03:49
[HDFS-12049] Recommissioning live nodes stalls the NN
...A node refresh will recommission included nodes that are alive and in decommissioning or decommissioned state. The recommission will scan all blocks on the node, find over replicated b...
, 2018-02-14, 03:49
[HDFS-6763] Initialize file system-wide quota once on transitioning to active
...FSImage#loadEdits calls updateCountForQuota to recalculate & verify quotas for the entire namespace. A standby NN using shared edits calls this method every minute. The stand...
, 2018-02-08, 21:57
[HDFS-10673] Optimize FSPermissionChecker's internal path usage
...The INodeAttributeProvider and AccessControlEnforcer features degrade performance and generate excessive garbage even when neither is used. Main issues: A byte of components is unn...
, 2018-01-05, 18:27
[HDFS-12907] Allow read-only access to reserved raw for non-superusers
...HDFS-6509 added a special /.reserved/raw path prefix to access the raw file contents of EZ files. In the simplest sense it doesn't return the FE info in the LocatedBlocks so the dfs cl...
, 2017-12-14, 21:19
[HDFS-4411] Asserts are disabled in unit tests
...Unlike 23, asserts are disabled for tests....
, 2017-12-12, 22:17
[HDFS-6305] WebHdfs response decoding may throw RuntimeExceptions
...WebHdfs does not guard against exceptions while decoding the response payload. The json parser will throw RunTime exceptions on malformed responses. The json decoding routines do...
, 2017-12-06, 19:12
[HDFS-12647] DN commands processing should be async
...Due to dataset lock contention, service actors may encounter significant latency while processing DN commands. Even the queuing of async deletions require multiple lock acquisiti...
, 2017-12-05, 22:59
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