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https://issues.apache.org/jira/browse/HDFS-5207?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Junping Du updated HDFS-5207:
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Description: We should change chooseTarget(..., DatanodeDescriptor writer,
...) to chooseTarget (..., node writer, ...) as the only important property of
writer is to identify other nodes' location relationship so more generic one
could be better. It also helps to cover cases that client node is not a
Datanode. Also, the excluded nodes are not necessary to be a HashMap with the
same key and value, Set is more proper in this case. (was: We should change
chooseTarget(..., DatanodeDescriptor writer, ...) to chooseTarget (..., node
writer, ...) as the only important property of writer is to identify other
nodes' location relationship so more generic one could be better. It also helps
to cover cases that client node is not a Datanode also.)
> In BlockPlacementPolicy, update 2 parameters of chooseTarget()
> --------------------------------------------------------------
>
> Key: HDFS-5207
> URL: https://issues.apache.org/jira/browse/HDFS-5207
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Reporter: Junping Du
> Assignee: Junping Du
> Attachments: HDFS-5207-v1.patch
>
>
> We should change chooseTarget(..., DatanodeDescriptor writer, ...) to
> chooseTarget (..., node writer, ...) as the only important property of writer
> is to identify other nodes' location relationship so more generic one could
> be better. It also helps to cover cases that client node is not a Datanode.
> Also, the excluded nodes are not necessary to be a HashMap with the same key
> and value, Set is more proper in this case.
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