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https://issues.apache.org/jira/browse/HDFS-10959?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15755526#comment-15755526
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Xiaoyu Yao edited comment on HDFS-10959 at 12/17/16 12:07 AM:
--------------------------------------------------------------
Attach a patch that add per volume io stats and metrics based on
ProfilingFileIoEvens.java. It is off by default to minimize the impact on
datanode normal IO. When needed, this can be enabled with the following for
profiling datanode IO perf.
{code}
<property>
<name>dfs.datanode.fileio.events.class</name>
<value>org.apache.hadoop.hdfs.server.datanode.ProfilingFileIoEvents</value>
<description>Profiling File IO Events on datanode volumes and expose
metrics.</description>
</property>
{code}
was (Author: xyao):
Attach a patch that add per volume io stats and metrics based on
ProfilingFileIoEvens.java. It is off by default to minimize the impact on
datanode normal IO. When needed, this can be enabled with the following for
profiling datanode IO perf.
{code}
<property>
<name>dfs.datanode.fileio.events.class</name>
<value>org.apache.hadoop.hdfs.server.datanode.ProfilingFileIoEvents</value>
<description>Profiling File IO Events on datanode volumes and expose
metrics.</description>
</property>
{code}
> Adding per disk IO statistics in DataNode.
> ------------------------------------------
>
> Key: HDFS-10959
> URL: https://issues.apache.org/jira/browse/HDFS-10959
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Reporter: Xiaoyu Yao
> Assignee: Xiaoyu Yao
> Attachments: HDFS-10959.00.patch
>
>
> This ticket is opened to support per disk IO statistics in DataNode based on
> HDFS-10930. The statistics added will make it easier to implement HDFS-4169
> "Add per-disk latency metrics to DataNode".
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