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Posted to hdfs-issues@hadoop.apache.org by "Jitendra Nath Pandey (JIRA)" <ji...@apache.org> on 2011/03/01 01:11:36 UTC
[jira] Updated: (HDFS-1649) Federation: Datanode command to refresh
namenode list at the datanode.
[ https://issues.apache.org/jira/browse/HDFS-1649?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jitendra Nath Pandey updated HDFS-1649:
---------------------------------------
Attachment: HDFS-1649.4.patch
New patch removes an unused import.
> Federation: Datanode command to refresh namenode list at the datanode.
> ----------------------------------------------------------------------
>
> Key: HDFS-1649
> URL: https://issues.apache.org/jira/browse/HDFS-1649
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: Federation Branch
> Reporter: Jitendra Nath Pandey
> Assignee: Jitendra Nath Pandey
> Fix For: Federation Branch
>
> Attachments: HDFS-1649.1.patch, HDFS-1649.2.patch, HDFS-1649.4.patch
>
>
> When a namenode is added to or removed from a cluster, we need a way to refresh the datanodes:
> 1. Datanode should load new configuration.
> 2. Compares the namenode list it has with that of new configuration. If a namenode is deleted, then corresponding
> BPOfferService thread is shutdown. If a new namenode is added, a BPOfferService thread is started to service the new
> namenode.
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