Tsz Wo Nicholas Sze created HDFS-13223:
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Summary: Reduce DiffListBySkipList memory usage
Key: HDFS-13223
URL: https://issues.apache.org/jira/browse/HDFS-13223
Project: Hadoop HDFS
Issue Type: Improvement
Components: snapshots
Reporter: Tsz Wo Nicholas Sze
Assignee: Shashikant Banerjee
There are several ways to reduce memory footprint of DiffListBySkipList.
- Move maxSkipLevels and skipInterval to DirectoryDiffListFactory.
- Use an array for skipDiffList instead of List.
- Do not store the level 0 element in skipDiffList.
- Do not create new ChildrenDiff for the same value.
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