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https://issues.apache.org/jira/browse/HDFS-12861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17203054#comment-17203054
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huhaiyang commented on HDFS-12861:
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[~elgoiri]It looks like very good work And are there plans to merge into the
trunk? Thanks.
> Track speed in DFSClient
> ------------------------
>
> Key: HDFS-12861
> URL: https://issues.apache.org/jira/browse/HDFS-12861
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Íñigo Goiri
> Assignee: María Fernanda Borge
> Priority: Major
> Attachments: HDFS-12861-10-april-18.patch
>
>
> Sometimes we get slow jobs because of the access to HDFS. However, is hard to
> tell what is the actual speed. We propose to add a log line with something
> like:
> {code}
> 2017-11-19 09:55:26,309 INFO [main] hdfs.DFSClient: blk_1107222019_38144502
> READ 129500B in 7ms 17.6MB/s
> 2017-11-27 19:01:04,141 INFO [DataStreamer for file
> /hdfs-federation/stats/2017/11/27/1511838000000.json] hdfs.DFSClient:
> blk_1135792057_86833357 WRITE 131072B in 10ms 12.5MB/s
> 2017-11-27 19:01:14,219 INFO [DataStreamer for file
> /hdfs-federation/stats/2017/11/27/1511838000000.json] hdfs.DFSClient:
> blk_1135792069_86833369 WRITE 131072B in 12ms 10.4MB/s
> 2017-11-27 19:01:24,282 INFO [DataStreamer for file
> /hdfs-federation/stats/2017/11/27/1511838000000.json] hdfs.DFSClient:
> blk_1135792081_86833381 WRITE 131072B in 11ms 11.4MB/s
> 2017-11-27 19:01:34,330 INFO [DataStreamer for file
> /hdfs-federation/stats/2017/11/27/1511838000000.json] hdfs.DFSClient:
> blk_1135792093_86833393 WRITE 131072B in 11ms 11.4MB/s
> 2017-11-27 19:01:44,408 INFO [DataStreamer for file
> /hdfs-federation/stats/2017/11/27/1511838000000.json] hdfs.DFSClient:
> blk_1135792105_86833405 WRITE 131072B in 11ms 11.4MB/s
> {code}
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