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Posted to hdfs-issues@hadoop.apache.org by "Kihwal Lee (JIRA)" <ji...@apache.org> on 2012/09/13 22:29:10 UTC
[jira] [Updated] (HDFS-3731) 2.0 release upgrade must handle blocks
being written from 1.0
[ https://issues.apache.org/jira/browse/HDFS-3731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Kihwal Lee updated HDFS-3731:
-----------------------------
Attachment: hdfs-3731.branch-023.patch.txt
Attaching the patch for branch 0.23. This is a straightforward merge of the trunk patch. However, due to differences in the edits loading in namenode, it requires HDFS-3922.
When committing, please copy and svn add 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: 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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