hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4305) Add a configurable limit on number of blocks per file, and min block size
Date Thu, 02 May 2013 04:00:18 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13647258#comment-13647258
] 

Hudson commented on HDFS-4305:
------------------------------

Integrated in HBase-TRUNK-on-Hadoop-2.0.0 #517 (See [https://builds.apache.org/job/HBase-TRUNK-on-Hadoop-2.0.0/517/])
    HBASE-8469 [hadoop2] Several tests break because of HDFS-4305 (Revision 1478203)

     Result = FAILURE
jmhsieh : 
Files : 
* /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java

                
> Add a configurable limit on number of blocks per file, and min block size
> -------------------------------------------------------------------------
>
>                 Key: HDFS-4305
>                 URL: https://issues.apache.org/jira/browse/HDFS-4305
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 1.0.4, 2.0.4-alpha
>            Reporter: Todd Lipcon
>            Assignee: Andrew Wang
>            Priority: Minor
>             Fix For: 2.0.5-beta
>
>         Attachments: hdfs-4305-1.patch, hdfs-4305-2.patch, hdfs-4305-3.patch
>
>
> We recently had an issue where a user set the block size very very low and managed to
create a single file with hundreds of thousands of blocks. This caused problems with the edit
log since the OP_ADD op was so large (HDFS-4304). I imagine it could also cause efficiency
issues in the NN. To prevent users from making such mistakes, we should:
> - introduce a configurable minimum block size, below which requests are rejected
> - introduce a configurable maximum number of blocks per file, above which requests to
add another block are rejected (with a suitably high default as to not prevent legitimate
large files)

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message