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From "Haohui Mai (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7697) Document the scope of the PB OIV tool
Date Mon, 02 Feb 2015 22:00:37 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14302013#comment-14302013
] 

Haohui Mai commented on HDFS-7697:
----------------------------------

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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