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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1138) Datanodes that are dead for a long long time should not show up in the UI
Date Wed, 22 Aug 2007 21:30:31 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12521935
] 

Raghu Angadi commented on HADOOP-1138:
--------------------------------------

There are two related issues here :
 # Datanodes displayed in webui and "dfs -report"
 # Policy regd storing all the known storage ids and datanodes persistently in Namenode. 

I will file a different jira for the second one.


> Datanodes that are dead for a long long time should not show up in the UI
> -------------------------------------------------------------------------
>
>                 Key: HADOOP-1138
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1138
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>            Reporter: dhruba borthakur
>            Assignee: Raghu Angadi
>             Fix For: 0.15.0
>
>
> Proposal 1:
> If a include files is used, then show all nodes (dead/alive) that are listed in the includes
file. If there isn't an include file, then display only nodes that have pinged this instance
of the namenode.
> Proposal2:
> A config variable specifies the time duration. The namenode, on a restart, purges all
datanodes that have not pinged for that time duration. The default value of this config variable
can be 1 week. 

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