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https://issues.apache.org/jira/browse/HDFS-5222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13777641#comment-13777641
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Tsz Wo (Nicholas), SZE commented on HDFS-5222:
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I think the original code is to count the number of blocks scheduled in every
N-minute period. However, it does not count the numbers accurately so that it
names the variables with "Approx".
Let's do not change the code here even we found a bug. We should fix the bug,
if there is any, in trunk.
> Move block schedule information from DatanodeDescriptor to DatanodeStorageInfo
> ------------------------------------------------------------------------------
>
> Key: HDFS-5222
> URL: https://issues.apache.org/jira/browse/HDFS-5222
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Attachments: h5222_20130819.patch, h5222_20130824.patch
>
>
> In HDFS-4990, the block placement target type was changed from
> DatanodeDescriptor to DatanodeStorageInfo. The block schedule information,
> such as the number of blocks scheduled for replication (i.e.
> getBlocksScheduled()), should be moved from DatanodeDescriptor to
> DatanodeStorageInfo.
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