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https://issues.apache.org/jira/browse/HDFS-3731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Brahma Reddy Battula updated HDFS-3731:
---------------------------------------
Description:
Release 2.0 upgrades must handle blocks being written to (bbw) files from 1.0
release. Problem reported by @brahmareddy
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.
was:
Release 2.0 upgrades must handle blocks being written to (bbw) files from 1.0
release. Problem reported by @brahmaredd
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.
> 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 @brahmareddy
> 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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