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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7240) Object store in HDFS
Date Thu, 26 May 2016 22:32:15 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15303085#comment-15303085

Colin Patrick McCabe commented on HDFS-7240:

bq. Correct me if I am wrong – before Andrew Wang's contribution, symlink was somehow working
(based on Eli Collins's work). After Andrew's work, we had no choice but disable the symlink
feature. It this sense, symlink became even worse. Anyway, Andrew/Eli, any plan to fix symlink?

Symlinks were broken before Andrew started working on them.  They had serious security, performance,
and usability issues.  If you are interested in learning more about the issues and helping
to fix them, take a look at HADOOP-10019.  They were disabled to avoid exposing people to
serious security risks.  In the meantime, I will note that you were one of the reviewers on
the JIRA that initially introduced symlinks, HDFS-245, before Andrew or I had even started
working on Hadoop.

> Object store in HDFS
> --------------------
>                 Key: HDFS-7240
>                 URL: https://issues.apache.org/jira/browse/HDFS-7240
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: Jitendra Nath Pandey
>            Assignee: Jitendra Nath Pandey
>         Attachments: Ozone-architecture-v1.pdf, Ozonedesignupdate.pdf, ozone_user_v0.pdf
> This jira proposes to add object store capabilities into HDFS. 
> As part of the federation work (HDFS-1052) we separated block storage as a generic storage
layer. Using the Block Pool abstraction, new kinds of namespaces can be built on top of the
storage layer i.e. datanodes.
> In this jira I will explore building an object store using the datanode storage, but
independent of namespace metadata.
> I will soon update with a detailed design document.

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