Yang Yun created HDFS-15033:
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Summary: Support save replica cache file to other place and make
expired time configurable
Key: HDFS-15033
URL: https://issues.apache.org/jira/browse/HDFS-15033
Project: Hadoop HDFS
Issue Type: Improvement
Components: datanode
Reporter: Yang Yun
Assignee: Yang Yun
For slow volume with many replicas, the ShutdownHook may be teminated without
saving all replica. add an option to save the replica files to high-speed disk
and speed up the saving.
Also add a option to change the expire time of the replica file.
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