hadoop-common-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1595) Add an option to setReplication method to wait for completion of replication
Date Tue, 17 Jul 2007 18:46:04 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12513323
] 

Hairong Kuang commented on HADOOP-1595:
---------------------------------------

The code looks good. The only thing that I am concerned about is its efficiency. The code
checks if a block is fully replicated by asking the block's locations from a namenode. This
requires a request to the namenode for each block. I think it would be more efficient if we
get all blocks' locations of a file in one request.

> Add an option to setReplication method to wait for completion of replication 
> -----------------------------------------------------------------------------
>
>                 Key: HADOOP-1595
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1595
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: dfs
>    Affects Versions: 0.14.0
>            Reporter: Christian Kunz
>         Attachments: 1595_20070716b.patch
>
>
> Currently setReplication requested by a client returns immediately, without waiting for
completion of replication. There are situations where the client would like to know when the
replication is actually done.
> This option should be available in fs shell and libhdfs (see HADOOP-1551).

-- 
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