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https://issues.apache.org/jira/browse/HDFS-7697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14302013#comment-14302013
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Haohui Mai commented on HDFS-7697:
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Thanks for the follow ups. Based on the discussion on HDFS-6673, I think it is
necessary to document that:
* Assumptions. The tool assumes that the LevelDB has to be fitted into the
memory, otherwise it will lead to one seek per inode.
* Scope of applicability. As the tool might trash the system when processing
large fsimage, it is reasonable to state that it does not work with large
fsimage and to ask the users to use the legacy oiv tool.
It might also makes sense to state the tool as experimental and unstable so
that we can continue to improve it without having the worries of maintaining
compatibility.
> Document the scope of the PB OIV tool
> -------------------------------------
>
> Key: HDFS-7697
> URL: https://issues.apache.org/jira/browse/HDFS-7697
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Haohui Mai
>
> As par HDFS-6673, we need to document the applicable scope of the new PB OIV
> tool so that it won't catch users by surprise.
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