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https://issues.apache.org/jira/browse/HDFS-8982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14724372#comment-14724372
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Jing Zhao commented on HDFS-8982:
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After HDFS-8823, the replication factor is recorded inside of BlockInfo, which
should be equal to the max replication factor among all the time periods
(snapshots and current) the block belongs to. If we can make sure this block
level replication factor is always updated correctly, maybe we do not need
{{getPreferredBlockReplication}} anymore?
> Consolidate getFileReplication and getPreferredBlockReplication in INodeFile
> ----------------------------------------------------------------------------
>
> Key: HDFS-8982
> URL: https://issues.apache.org/jira/browse/HDFS-8982
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Affects Versions: 2.7.1
> Reporter: Zhe Zhang
>
> Currently {{INodeFile}} provides both {{getFileReplication}} and
> {{getPreferredBlockReplication}} interfaces. At the very least they should be
> renamed (e.g. {{getCurrentFileReplication}} and
> {{getMaxConfiguredFileReplication}}), with clearer Javadoc.
> I also suspect we are not using them correctly in all places right now.
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