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https://issues.apache.org/jira/browse/HDFS-16917?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ravindra Dingankar updated HDFS-16917:
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Description:
Currently we have the following metrics for datanode reads.
|BytesRead
BlocksRead
TotalReadTime|Total number of bytes read from DataNode
Total number of blocks read from DataNode
Total number of milliseconds spent on read operation|
We would like to add a new quantile metric calculating the transfer rate for
datanode reads.
This will give us a distribution across a window of the read transfer rate for
each datanode.
Percentiles for transfer rate will help in identifying issues like hotspotting
of datasets as well as finding repetitive slow datanodes.
was:
Currently we have the following metrics for datanode reads.
|BytesRead
BlocksRead
TotalReadTime|Total number of bytes read from DataNode
Total number of blocks read from DataNode
Total number of milliseconds spent on read operation|
We would like to add a new quantile metric calculating the data transfer rate
for datanode reads.
This will give us a distribution across a window of the transfer rate for each
datanode.
Percentiles for transfer rate will help in identifying repetitive slow
datanodes or nodes with hotspots.
> Add transfer rate quantile metrics for DataNode reads
> -----------------------------------------------------
>
> Key: HDFS-16917
> URL: https://issues.apache.org/jira/browse/HDFS-16917
> Project: Hadoop HDFS
> Issue Type: Task
> Components: datanode
> Reporter: Ravindra Dingankar
> Priority: Minor
> Labels: pull-request-available
>
> Currently we have the following metrics for datanode reads.
> |BytesRead
> BlocksRead
> TotalReadTime|Total number of bytes read from DataNode
> Total number of blocks read from DataNode
> Total number of milliseconds spent on read operation|
> We would like to add a new quantile metric calculating the transfer rate for
> datanode reads.
> This will give us a distribution across a window of the read transfer rate
> for each datanode.
> Percentiles for transfer rate will help in identifying issues like
> hotspotting of datasets as well as finding repetitive slow datanodes.
>
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