Yi Liu created HDFS-8794:
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Summary: Improve CorruptReplicasMap
Key: HDFS-8794
URL: https://issues.apache.org/jira/browse/HDFS-8794
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: Yi Liu
Assignee: Yi Liu
Currently we use {{TreeMap}} for {{corruptReplicasMap}}, actually the only need
sorted place is {{getCorruptReplicaBlockIds}} which is used by test.
So we can use {{HashMap}}.
>From memory and performance view, {{HashMap}} is better than {{TreeMap}}, a
>simliar optimization HDFS-7433. Of course we need to make few change to
>{{getCorruptReplicaBlockIds}}.
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