[jira] Commented: (HADOOP-3929) I would like to improve the archive tool [see issue 3307].

["dhruba borthakur (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-3929?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12621214#action_12621214 ] 

dhruba borthakur commented on HADOOP-3929:
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+1. This will be a useful feature to have.



> I would like to improve the archive tool [see issue 3307].
> ----------------------------------------------------------
>
>                 Key: HADOOP-3929
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3929
>             Project: Hadoop Core
>          Issue Type: Improvement
>            Reporter: Dick King
>   Original Estimate: 504h
>  Remaining Estimate: 504h
>
> I have a tool written atop the libhdfs library that implements an archive system.  It's working [in C++]
> JIRA #3307 documents a native DFS archive system, first available in 18.0 .
> I would like to port my code, and thereby extend that system in 3 directions:
> 1: archives will be immutable in 18.0 .  I would like to provide an API to let you add, delete, and modify files.
>    1a: You would want to be able to batch such operations and perform them all at once when a batch is complete.
> 2: the tree to be archived must be in dfs in 18.0 .  I would like it to be possible for the tree to contain some local filesystem files as well [think org.apache.hadoop.fs.Path ]
>    2a: I realize that this would preclude parallel modification when a local filesystem is used
>    2b: I don't have a convincing story re two processes simultaneously modifying the same archive, even for a disjoint set of files, but I'm willing to discuss this.
> 3: i would like it to be possible to batch the changes and make them all in one operation, to reduce DFS activity.
> I had in-person discussions on this with user mahadev .  He is encouraging me to file this bug report so we can broaden this discussion.

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