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