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[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
[HDFS-10955] Pass IIP for FSDirAttr methods
...Methods should always use the resolved IIP instead of re-solving the path....
, 2016-10-06, 22:00
[HDFS-10745] Directly resolve paths into INodesInPath
...The intermediate resolution to a string, only to be decomposed by INodesInPath back into a byte can be eliminated by resolving directly to an IIP. The IIP will contain the resolved...
, 2016-10-06, 17:03
[HDFS-10956] Remove rename/delete performance penalty when not using snapshots
...When deleting or renaming directories, the entire subtree(s) is scanned for snapshottable directories. The performance penalty may become very expensive for dense trees. The snap...
, 2016-10-04, 20:30
[HDFS-10940] Reduce performance penalty of block caching when not used
...For every block location generated, the CacheManager will create a junk object for a hash lookup of cached locations. If there are no cached blocks, none of this is required....
, 2016-10-03, 17:01
[HDFS-10619] Cache path in InodesInPath
...INodesInPath#getPath, a frequently called method, dynamically builds the path. IIP should cache the path upon construction....
, 2016-10-03, 14:43
[HDFS-10851] FSDirStatAndListingOp: stop passing path as string
...Path strings should be resolved once into INodesInPath. The IIP should be used extensively from that point forward. ...
, 2016-10-03, 14:10
[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...
, 2016-09-30, 16:57
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