hadoop-mapreduce-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-972) distcp can timeout during rename operation to s3
Date Mon, 19 Oct 2009 16:47:59 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12767377#action_12767377
] 

Doug Cutting commented on MAPREDUCE-972:
----------------------------------------

> Extending the FileSystem API is a non-starter [ ... ]

Isn't the FileSystem API mid-rewrite right now in HADOOP-6223?  So now might actually be the
rare time to consider something like this.  It's unfortunate that Rename.Options is an Enum,
so it'd be hard to add a progress function there without changing that.  Perhaps Rename.Options.OVERWRITE
could still be a constant, but Rename.Options#createProgress(Progressible) could return a
subclass of Rename.Options that wraps a Progressible or somesuch.  I don't mean to push this
approach, rather just to question whether it should be ruled out completely.  If it seems
reasonable for file rename implementations to take a long time, then adding a progress callback
might be a reasonable approach.


> distcp can timeout during rename operation to s3
> ------------------------------------------------
>
>                 Key: MAPREDUCE-972
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-972
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: distcp
>    Affects Versions: 0.20.1
>            Reporter: Aaron Kimball
>            Assignee: Aaron Kimball
>         Attachments: MAPREDUCE-972.2.patch, MAPREDUCE-972.3.patch, MAPREDUCE-972.4.patch,
MAPREDUCE-972.5.patch, MAPREDUCE-972.patch
>
>
> rename() in S3 is implemented as copy + delete. The S3 copy operation can perform very
slowly, which may cause task timeout.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message