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https://issues.apache.org/jira/browse/HDFS-5377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13801344#comment-13801344
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Tsz Wo (Nicholas), SZE commented on HDFS-5377:
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Since we know exactly how many volumes in FsDatasetImpl.getStorageReports(..),
why don't we create an array for the reports in the first place? I.e.
{code}
final StorageReport[] reports = new StorageReport[volumes.volumes.size()];
{code}
> Heartbeats from Datandode should include one storage report per storage
> directory
> ---------------------------------------------------------------------------------
>
> Key: HDFS-5377
> URL: https://issues.apache.org/jira/browse/HDFS-5377
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: Heterogeneous Storage (HDFS-2832)
> Reporter: Arpit Agarwal
> Assignee: Arpit Agarwal
> Attachments: h5377.10.patch
>
>
> Heartbeats must include one storage report per storage directory, so that
> usage information for each directory is available to the DataNode for block
> placement.
> This is a continuation of the work started by HDFS-5134 and HDFS-4988 to
> split block processing per storage directory.
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