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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-14387) create a client-side override for dfs.namenode.block-placement-policy.default.prefer-local-node
Date Fri, 22 Mar 2019 21:27:00 GMT
Sergey Shelukhin created HDFS-14387:
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             Summary: create a client-side override for dfs.namenode.block-placement-policy.default.prefer-local-node

                 Key: HDFS-14387
                 URL: https://issues.apache.org/jira/browse/HDFS-14387
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Sergey Shelukhin


It should be possible for a service to decide whether it wants to use the local node preference;
as it stands, if dfs.namenode.block-placement-policy.default.prefer-local-node is enabled,
the services that run far fewer instances than there are DNs in the cluster unnecessarily
concentrate their write load; the only way around it seems to be to disable prefer-local-node
globally.



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