You are viewing a plain text version of this content. The canonical link for it is here.

Posted to hdfs-issues@hadoop.apache.org by "Shweta (JIRA)" <ji...@apache.org> on 2018/09/11 20:58:00 UTC

[jira] [Created] (HDFS-13910) Improve BlockPlacementPolicy for small clusters

Shweta created HDFS-13910:
-----------------------------

             Summary: Improve BlockPlacementPolicy for small clusters
                 Key: HDFS-13910
                 URL: https://issues.apache.org/jira/browse/HDFS-13910
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: hdfs
            Reporter: Shweta
            Assignee: Shweta


From investigations and a few test occurrences, the NameNode BlockPlacementPolicy’s considerLoad can be bad for small test clusters.
A small (1-node) cluster may trigger a corner case of maxLoad = 0. In this case, filtering should not take place. 

When there is no heartbeat, maxLoad will be 0 and the existing logic will filter out many nodes that have workload, which should be avoided.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

---------------------------------------------------------------------
To unsubscribe, e-mail: hdfs-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: hdfs-issues-help@hadoop.apache.org