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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-993) Namenode does not need to store any data node info persistently.
Date Thu, 15 Mar 2007 21:16:09 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-993?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

dhruba borthakur updated HADOOP-993:

    Attachment: noDatanodesInFsimage.patch

This patch removes storing datanode information in the HDFS image.  The fsimage version is
bumped to -4. The new namenode is backward-compatible, i.e. it can operate on an older-image.

It seems it will conflict with the HDFS-upgrade (hadoop-702) patch, so we will not submit
this patch till the upgrade patch is submitted. The code is for code-review purposes only.

Review comments welcome.

> Namenode does not need to store any data node info persistently.
> ----------------------------------------------------------------
>                 Key: HADOOP-993
>                 URL: https://issues.apache.org/jira/browse/HADOOP-993
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: dfs
>            Reporter: Raghu Angadi
>         Assigned To: Sameer Paranjpye
>         Attachments: noDatanodesInFsimage.patch
> Namenode does not need to serialize datanode info. It will map datanode to storageID
when datanode register.

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