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Posted to hdfs-issues@hadoop.apache.org by "Jing Zhao (JIRA)" <ji...@apache.org> on 2014/08/28 07:27:59 UTC

[jira] [Created] (HDFS-6961) BlockPlacementPolicy#chooseTarget should check each valid storage type in each choosing round

Jing Zhao created HDFS-6961:
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             Summary: BlockPlacementPolicy#chooseTarget should check each valid storage type in each choosing round
                 Key: HDFS-6961
                 URL: https://issues.apache.org/jira/browse/HDFS-6961
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Jing Zhao
            Assignee: Jing Zhao


Currently in each choosing round of BlockPlacementPolicy#chooseTarget (e.g., round 1 for choosing local storage, round 2 for remote rack, etc.), we only take into account the first storage type in the storage type list. This may 
fail to choose the local machine or sometimes may even fail to choose enough nodes.



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