Replace Vector types by ArrayList in FSDirectory
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Key: HADOOP-1268
URL: https://issues.apache.org/jira/browse/HADOOP-1268
Project: Hadoop
Issue Type: Improvement
Affects Versions: 0.12.0, 0.11.0, 0.10.0
Reporter: Konstantin Shvachko
Fix For: 0.13.0
FSDirectory contains local variables that are declared Vector but are used
within a
synchronized{ ... } block. Extra synchronization provided by Vector is
redundant in the case.
Using ArrayLists instead should boost the performance.
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