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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-2797) Withdraw CRC upgrade from HDFS
Date Mon, 28 Apr 2008 23:49:55 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-2797?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Raghu Angadi updated HADOOP-2797:
---------------------------------

    Attachment: HADOOP-2797.patch

Updated patch for Hudson. This has all the changes except for the changes to hadoop-12-dfs-dir.txt
and hadoop-12-dfs-dir.tgz required by TestDFSUpgradeFromImage. All the Hudson tests except
TestDFSUpgradeFromImage should pass.

> One option would be to keep the existing test and ensure that it fails. This will test
that if anybody tries to upgrade an old version, then the upgrade will fail.

In stead a new test case is added to TestDFSUpgrade.java that tests upgrade from older version.

Once Hudson passes (except one test), the following extra steps are required to commit :

- rename hadoop-12-dfs-dir.txt to hadoop-dfs-dir.txt 
- delete hadoop-12-dfs-dir.tgz and add hadoop-dfs-dir.tgz (to be attached).
- apply the updated patch.

> Withdraw CRC upgrade from HDFS
> ------------------------------
>
>                 Key: HADOOP-2797
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2797
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: dfs
>    Affects Versions: 0.13.0
>            Reporter: Robert Chansler
>            Assignee: Raghu Angadi
>            Priority: Critical
>         Attachments: HADOOP-2797.patch, HADOOP-2797.patch, HADOOP-2797.patch
>
>
> HDFS will no longer support upgrades from versions without CRCs for block data. Users
upgrading from version 0.13 or earlier must first upgrade to an intermediate (0.14, 0.15,
0.16) version before upgrade to 0.17 or later.

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