Xiangyi Zhu created HDFS-16412:
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Summary: Add metrics to support obtaining file size distribution
Key: HDFS-16412
URL: https://issues.apache.org/jira/browse/HDFS-16412
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
Affects Versions: 3.4.0
Reporter: Xiangyi Zhu
Assignee: Xiangyi Zhu
Use RangeMapRange "Map<Long, MutableLong> fileSizeRange" to store counters at
different intervals. RangeMap key is a specific interval, and value is the
counter corresponding to the interval.
**
*Counter update:*
When the file size changes or the file is deleted, the file size is obtained,
and the counter in the corresponding interval is called to update the counter.
**
*Interval division:*
The default is to initialize the startup according to the following interval,
or it can be initialized through the configuration file.
0MB
0-16MB
16-32MB
32-64MB
64-128MB
128-256MB
256-512MB
>512MB
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