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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-1547) Improve decommission mechanism
Date Tue, 11 Jan 2011 23:40:47 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1547?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Suresh Srinivas updated HDFS-1547:
----------------------------------

    Attachment: HDFS-1547.patch

In addition to the proposed changes I made the following changes:
> In Live Nodes web page, in addition to live nodes listed today, a separate table (not
column) will list decommissioned nodes.
I noticed that there is a column already in live nodes table that lists admin state. I made
it sortable to find the decommissioned nodes, instead of adding a new table.

# In Dead Nodes web page, in addition to live nodes listed today, a separate table (not column)
will list decommissioned nodes.
I added a colum that indicates if the node is decommissioned (true/false). It is sortable.

The reason for not adding a separate table is, it make sorting tables confusing and the existing
jsp page more complicated.

Other changes:
# Added decommissioned state to JMX methods FSNameSystem#getLiveNodes() and FSNameSystem#getDeadNodes()
# Changed the DFSAdmin command to fix incorrect explanation of include/exclude file.
# Update DFSAdmin -refreshNodes document the new behavior.


> Improve decommission mechanism
> ------------------------------
>
>                 Key: HDFS-1547
>                 URL: https://issues.apache.org/jira/browse/HDFS-1547
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>    Affects Versions: 0.23.0
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>             Fix For: 0.23.0
>
>         Attachments: HDFS-1547.patch
>
>
> Current decommission mechanism driven using exclude file has several issues. This bug
proposes some changes in the mechanism for better manageability. See the proposal in the next
comment for more details.

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