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[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...
, 2016-12-16, 13:10
[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...
, 2016-12-01, 18:22
[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...
, 2016-11-18, 01:21
[HDFS-7964] Add support for async edit logging
...Edit logging is a major source of contention within the NN. LogEdit is called within the namespace write log, while logSync is called outside of the lock to allow greater concurrency. ...
, 2016-11-02, 10:31
[HDFS-10997] Reduce number of path resolving methods
...FSDirectory contains many methods for resolving paths to an IIP and/or inode. These should be unified into a couple methods that will consistently do the basics of resolving reserved p...
, 2016-11-01, 14:35
[HDFS-10722] Fix race condition in TestEditLog#testBatchedSyncWithClosedLogs
...The test may fail the following assertion if async edit logs are enabled:logging edit without syncing should do not affect txid expected:<1> but was:<2>. The async thread i...
, 2016-10-31, 23:38
[HDFS-10789] Route webhdfs through the RPC call queue
...Webhdfs is extremely expensive under load and is not subject to the QoS benefits of the RPC call queue. HADOOP-13537 provides the basis for routing webhdfs through the call queue to pr...
, 2016-10-12, 21:48
[HDFS-10980] Optimize check for existence of parent directory
...FSDirectory.verifyParentDir() uses a Path object to parse and return the parent path. This is very expensive compared to using the path within the IIP....
, 2016-10-07, 22:54
[HDFS-10979] Pass IIP for FSDirDeleteOp methods
...Remove path strings from method signatures and/or replace with IIP....
, 2016-10-07, 20:26
[HDFS-10939] Reduce performance penalty of encryption zones
...The encryption zone APIs should be optimized to extensively use IIPs to eliminate path resolutions. The performance penalties incurred by common operations like creation of file status...
, 2016-10-07, 17:37
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