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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5704) Change OP_UPDATE_BLOCKS with a new OP_ADD_BLOCK
Date Wed, 15 Jan 2014 08:01:22 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5704?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13871779#comment-13871779
] 

Hadoop QA commented on HDFS-5704:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12623078/editsStored
  against trunk revision .

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/5881//console

This message is automatically generated.

> Change OP_UPDATE_BLOCKS  with a new OP_ADD_BLOCK
> ------------------------------------------------
>
>                 Key: HDFS-5704
>                 URL: https://issues.apache.org/jira/browse/HDFS-5704
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Suresh Srinivas
>            Assignee: Jing Zhao
>         Attachments: HDFS-5704-branch2.patch, HDFS-5704.000.patch, HDFS-5704.001.patch,
HDFS-5704.002.patch, HDFS-5704.003.patch, editsStored, editsStored
>
>
> Currently every time a block a allocated, the entire list of blocks are written in the
editlog in OP_UPDATE_BLOCKS operation. This has n^2 growth issue. The total size of editlog
records for a file with large number of blocks could be huge.
> The goal of this jira is discuss adding a different editlog record that only records
allocation of block and not the entire block list, on every block allocation.



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