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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3731) 2.0 release upgrade must handle blocks being written from 1.0
Date Fri, 28 Sep 2012 12:42:12 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13465573#comment-13465573
] 

Hudson commented on HDFS-3731:
------------------------------

Integrated in Hadoop-Hdfs-0.23-Build #388 (See [https://builds.apache.org/job/Hadoop-Hdfs-0.23-Build/388/])
    HDFS-3731. 2.0 release upgrade must handle blocks being written from 1.0 (Kihwal Lee via
daryn) (Revision 1391155)

     Result = UNSTABLE
daryn : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1391155
Files : 
* /hadoop/common/branches/branch-0.23/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
* /hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/common/Storage.java
* /hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataStorage.java
* /hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSUpgradeFromImage.java
* /hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/common/TestDistributedUpgrade.java
* /hadoop/common/branches/branch-0.23/hadoop-hdfs-project/hadoop-hdfs/src/test/resources/hadoop1-bbw.tgz

                
> 2.0 release upgrade must handle blocks being written from 1.0
> -------------------------------------------------------------
>
>                 Key: HDFS-3731
>                 URL: https://issues.apache.org/jira/browse/HDFS-3731
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node
>    Affects Versions: 2.0.0-alpha
>            Reporter: Suresh Srinivas
>            Assignee: Kihwal Lee
>            Priority: Blocker
>             Fix For: 0.23.4, 2.0.2-alpha
>
>         Attachments: hadoop1-bbw.tgz, HDFS-3731.002.patch, HDFS-3731.003.patch, hdfs-3731.branch-023.patch.txt
>
>
> Release 2.0 upgrades must handle blocks being written to (bbw) files from 1.0 release.
Problem reported by Brahma Reddy.
> The {{DataNode}} will only have one block pool after upgrading from a 1.x release.  (This
is because in the 1.x releases, there were no block pools-- or equivalently, everything was
in the same block pool).  During the upgrade, we should hardlink the block files from the
{{blocksBeingWritten}} directory into the {{rbw}} directory of this block pool.  Similarly,
on {{-finalize}}, we should delete the {{blocksBeingWritten}} directory.

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