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https://issues.apache.org/jira/browse/HDFS-15355?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17110434#comment-17110434
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Íñigo Goiri commented on HDFS-15355:
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[~ayushtkn], I think we cannot just remove the old values; we need to make this
solution backwards compatible.
That would reduce the amount of churn in the patch too.
> Make the default block storage policy ID configurable
> -----------------------------------------------------
>
> Key: HDFS-15355
> URL: https://issues.apache.org/jira/browse/HDFS-15355
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: block placement, namenode
> Reporter: Yang Yun
> Assignee: Yang Yun
> Priority: Minor
> Attachments: HDFS-15355.001.patch, HDFS-15355.002.patch,
> HDFS-15355.003.patch, HDFS-15355.004.patch, HDFS-15355.005.patch,
> HDFS-15355.006.patch, HDFS-15355.007.patch
>
>
> Make the default block storage policy ID configurable. Sometime we want to
> use different storage policy ID from the startup of cluster.
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