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https://issues.apache.org/jira/browse/HDFS-10645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15386763#comment-15386763
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Akira Ajisaka commented on HDFS-10645:
--------------------------------------
{code}
// need to keep maxDataLength up-to-date, this is a configurable property.
this.maxDataLength = dn.getConf().getInt(
CommonConfigurationKeys.IPC_MAXIMUM_DATA_LENGTH,
CommonConfigurationKeys.IPC_MAXIMUM_DATA_LENGTH_DEFAULT);
{code}
The parameter is configurable but not reconfigurable, so it's sufficient to set
only once in the constructor.
> Make block report size as a metric and add this metric to datanode web ui
> -------------------------------------------------------------------------
>
> Key: HDFS-10645
> URL: https://issues.apache.org/jira/browse/HDFS-10645
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode, ui
> Reporter: Yuanbo Liu
> Assignee: Yuanbo Liu
> Attachments: HDFS-10645.001.patch, HDFS-10645.002.patch,
> HDFS-10645.003.patch, Selection_047.png, Selection_048.png
>
>
> Record block report size as a metric and show it on datanode UI. It's
> important for administrators to know the bottleneck of block report, and the
> metric is also a good tuning metric.
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