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Posted to common-dev@hadoop.apache.org by "Raghu Angadi (JIRA)" <ji...@apache.org> on 2007/07/30 18:29:53 UTC

[jira] Commented: (HADOOP-1664) Hadoop DFS upgrade prcoedure

    [ https://issues.apache.org/jira/browse/HADOOP-1664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12516431 ] 

Raghu Angadi commented on HADOOP-1664:
--------------------------------------

I am writing an admin guide for upgrading to Hadoop-0.14. will post it in couple of days. If you have any logs, please add them here. Upgrade and rollback procedure is same as before.

> Hadoop DFS upgrade prcoedure
> ----------------------------
>
>                 Key: HADOOP-1664
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1664
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: dfs
>    Affects Versions: 0.14.0
>            Reporter: Christian Kunz
>
> When upgrading from a July-9  to a July-25 nightly release, we are able to upgrade successfully on a single-node cluster, but failed on a 10 and a 200 node cluster.
> As it is not sure whether we made a mistake or not, I file this as an improvement. But going forward it is imperative that there is a safe and well-documented procedure to upgrade dfs without loss of data, including a rollback procedure and listing of operational procedures that are irreversibly destructive (hopefully an empty list).

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