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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13028) add low level counter metrics for S3A; use in read performance tests
Date Thu, 05 May 2016 15:28:13 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15272509#comment-15272509
] 

Hadoop QA commented on HADOOP-13028:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 0s {color} | {color:blue}
Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 5s {color} | {color:red}
HADOOP-13028 does not apply to trunk. Rebase required? Wrong Branch? See https://wiki.apache.org/hadoop/HowToContribute
for help. {color} |
\\
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|| Subsystem || Report/Notes ||
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12802441/HADOOP-13028-009.patch
|
| JIRA Issue | HADOOP-13028 |
| Console output | https://builds.apache.org/job/PreCommit-HADOOP-Build/9291/console |
| Powered by | Apache Yetus 0.3.0-SNAPSHOT   http://yetus.apache.org |


This message was automatically generated.



> add low level counter metrics for S3A; use in read performance tests
> --------------------------------------------------------------------
>
>                 Key: HADOOP-13028
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13028
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3, metrics
>    Affects Versions: 2.8.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>         Attachments: HADOOP-13028-001.patch, HADOOP-13028-002.patch, HADOOP-13028-004.patch,
HADOOP-13028-005.patch, HADOOP-13028-006.patch, HADOOP-13028-007.patch, HADOOP-13028-008.patch,
HADOOP-13028-009.patch, HADOOP-13028-branch-2-008.patch, org.apache.hadoop.fs.s3a.scale.TestS3AInputStreamPerformance-output.txt,
org.apache.hadoop.fs.s3a.scale.TestS3AInputStreamPerformance-output.txt
>
>
> against S3 (and other object stores), opening connections can be expensive, closing connections
may be expensive (a sign of a regression). 
> S3A FS and individual input streams should have counters of the # of open/close/failure+reconnect
operations, timers of how long things take. This can be used downstream to measure efficiency
of the code (how often connections are being made), connection reliability, etc.



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