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Posted to common-dev@hadoop.apache.org by "dhruba borthakur (JIRA)" <ji...@apache.org> on 2008/10/29 21:54:44 UTC

[jira] Commented: (HADOOP-4539) Streaming Edits to a Standby Name-Node.

    [ https://issues.apache.org/jira/browse/HADOOP-4539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12643648#action_12643648 ] 

dhruba borthakur commented on HADOOP-4539:
------------------------------------------

Cool docs! One  quick question: Does this design allow for multiple simultaneous Stabdby-NameNode?


> Streaming Edits to a Standby Name-Node.
> ---------------------------------------
>
>                 Key: HADOOP-4539
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4539
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: dfs
>            Reporter: Konstantin Shvachko
>             Fix For: 0.20.0
>
>         Attachments: image001.gif, StreamEditsToSNN.htm
>
>
> Currently Secondary name-node acts as mere checkpointer.
> Secondary name-node should be transformed into a standby name-node (SNN). 
> The long term goal is to make it a warm standby. 
> The purpose of this issue is to provide real time streaming of edits to SNN so that it contained the up-to-date namespace state.

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