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From "Zoran Dimitrijevic (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-11827) Speed-up distcp buildListing() using threadpool
Date Sat, 11 Apr 2015 19:41:12 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-11827?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zoran Dimitrijevic updated HADOOP-11827:
----------------------------------------
    Attachment: HADOOP-11827.patch

test patch report from my laptop:

{color:green}+1 overall{color}.  

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 4 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
3.0.1) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.



> Speed-up distcp buildListing() using threadpool
> -----------------------------------------------
>
>                 Key: HADOOP-11827
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11827
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: tools/distcp
>    Affects Versions: 3.0.0
>            Reporter: Zoran Dimitrijevic
>            Assignee: Zoran Dimitrijevic
>            Priority: Minor
>         Attachments: HADOOP-11827.patch
>
>   Original Estimate: 24h
>  Remaining Estimate: 24h
>
> For very large source trees on s3 distcp is taking long time to build file listing (client
code, before starting mappers). For a dataset I used (1.5M files, 50K dirs) it was taking
65 minutes before my fix in HADOOP-11785 and 36 minutes after the fix).



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