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https://issues.apache.org/jira/browse/HDFS-8876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14662190#comment-14662190
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Chris Trezzo commented on HDFS-8876:
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[~jingzhao] will do!
> 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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