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https://issues.apache.org/jira/browse/HADOOP-17999?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17442389#comment-17442389
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Konstantin Shvachko commented on HADOOP-17999:
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Was looking at the patch. Why do we need setting checksum in ViewFileSystem
globally for all mount points?
Seems it should be a per-target-file-system parameter, which is set when the
mount point is initialized from its own config.
> ViewFileSystem.setVerifyChecksum should not initialize all target filesystems
> -----------------------------------------------------------------------------
>
> Key: HADOOP-17999
> URL: https://issues.apache.org/jira/browse/HADOOP-17999
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Abhishek Das
> Assignee: Abhishek Das
> Priority: Major
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Currently setVerifyChecksum and setWriteChecksum initializes all target file
> systems which causes delay in hadoop shell copy commands such as get, put,
> copyFromLocal etc.
> This also eventually causes OOM.
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