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From Íñigo Goiri (JIRA) <j...@apache.org>
Subject [jira] [Commented] (HDFS-12861) Track speed in DFSClient
Date Mon, 09 Apr 2018 20:39:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16431189#comment-16431189
] 

Íñigo Goiri commented on HDFS-12861:
------------------------------------

[~mf_borge], it looks like the patch has two patches together adding and removing some components.
Can you post a diff to trunk?

> 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-12861-9-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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