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Posted to common-dev@hadoop.apache.org by "Raghu Angadi (JIRA)" <ji...@apache.org> on 2009/02/03 00:47:59 UTC

[jira] Commented: (HADOOP-5158) Port HDFS space quotas to 0.18

    [ https://issues.apache.org/jira/browse/HADOOP-5158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12669803#action_12669803 ] 

Raghu Angadi commented on HADOOP-5158:
--------------------------------------

This patch requires increasing file system image version. The main implication is that once a cluster upgrades to 0.18.4, 0.18.3 can not be run on the same image (normal for major version upgrades). '-rollback' works as expected.

This is a fairly safe patch and there is no known impact on performance or stability (especially when no quotas are used). In the worst case where 'rollback' is not good enough, a small patch that ignores the new quota fields.

> Port HDFS space quotas to 0.18
> ------------------------------
>
>                 Key: HADOOP-5158
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5158
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: dfs
>    Affects Versions: 0.18.3
>            Reporter: Raghu Angadi
>            Assignee: Raghu Angadi
>             Fix For: 0.18.4
>
>
> 0.18 already has quotas for HDFS namespace (HADOOP-3187). HADOOP-3938 implements similar quotas for disk space on HDFS in 0.19. This jira proposes to port HADOOP-3938 to 0.18.4.

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