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Posted to hdfs-dev@hadoop.apache.org by "Ming Ma (JIRA)" <ji...@apache.org> on 2015/08/07 20:02:45 UTC

[jira] [Created] (HDFS-8876) Make hard coded parameters used by balancer and other tools configurable

Ming Ma created HDFS-8876:
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             Summary: Make hard coded parameters used by balancer and other tools configurable
                 Key: HDFS-8876
                 URL: https://issues.apache.org/jira/browse/HDFS-8876
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Ming Ma
            Assignee: Chris Trezzo


During investigation of how to speed up balancer, at least to the level specified by {{dfs.datanode.balance.bandwidthPerSec}}, we found that parameters such as {{MAX_BLOCKS_SIZE_TO_FETCH}} and {{SOURCE_BLOCKS_MIN_SIZE}} are hard coded. These parameters are related to block size and other configurable parameters used by balancer. So least we should make it configurable. In the longer term, it might be interesting to understand if we simplify all these related configurations. 



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