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From "Haohui Mai (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (HDFS-7437) Storing block ids instead of BlockInfo object in INodeFile
Date Wed, 26 Nov 2014 18:58:13 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7437?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Haohui Mai reopened HDFS-7437:

Reopen the issue, resolved the wrong jira.

> Storing block ids instead of BlockInfo object in INodeFile
> ----------------------------------------------------------
>                 Key: HDFS-7437
>                 URL: https://issues.apache.org/jira/browse/HDFS-7437
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Haohui Mai
>            Assignee: Haohui Mai
>             Fix For: 2.7.0
>         Attachments: HDFS-7437.000.patch, HDFS-7437.001.patch
> Currently {{INodeFile}} stores the lists of blocks as references of {{BlockInfo}} instead
of the block ids. This creates implicit dependency between the namespace and the block manager.
> The dependency blocks several recent efforts, such as separating the block manager out
as a standalone service, moving block information off heap, and optimizing the memory usage
of block manager.
> This jira proposes to decouple the dependency by storing block ids instead of object
reference in {{INodeFile}} objects.

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