[
https://issues.apache.org/jira/browse/HDFS-1351?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dmytro Molkov reassigned HDFS-1351:
-----------------------------------
Assignee: Dmytro Molkov
> Make it possible for BlockPlacementPolicy to return null
> --------------------------------------------------------
>
> Key: HDFS-1351
> URL: https://issues.apache.org/jira/browse/HDFS-1351
> Project: Hadoop HDFS
> Issue Type: Test
> Components: name-node
> Affects Versions: 0.22.0
> Reporter: Dmytro Molkov
> Assignee: Dmytro Molkov
>
> The idea is to modify FSNamesystem.chooseExcessReplicates code, so it can
> accept a null return from chooseReplicaToDelete which will indicate that
> NameNode should not be deleting extra replicas.
> One possible usecase - if there are nodes being added to the cluster that
> might have corrupt replicas on them you do not want to delete other replicas
> until the block scanner finished scanning every block on the datanode.
> This will require additional work on the implementation of the
> BlockPlacementPolicy, but with this JIRA I just wanted to create a basis for
> future improvements.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
