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Posted to hdfs-issues@hadoop.apache.org by "Brandon Li (JIRA)" <ji...@apache.org> on 2013/01/24 01:25:13 UTC

[jira] [Commented] (HDFS-4434) Provide a mapping from INodeId to INode

    [ https://issues.apache.org/jira/browse/HDFS-4434?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13561270#comment-13561270 ] 

Brandon Li commented on HDFS-4434:
----------------------------------

Some rough estimation: suppose one map entry takes minimal 16 bytes(8b-inodeid, 8b-inode reference), ~160MB is required for 10 million inodes.
                
> Provide a mapping from INodeId to INode
> ---------------------------------------
>
>                 Key: HDFS-4434
>                 URL: https://issues.apache.org/jira/browse/HDFS-4434
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>    Affects Versions: 3.0.0
>            Reporter: Brandon Li
>            Assignee: Brandon Li
>
> This JIRA is to provide a way to access the INode via its id. The proposed solution is to have an in-memory mapping from INodeId to INode. 

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