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From "Brandon Williams (JIRA)" <j...@apache.org>
Subject [jira] Issue Comment Edited: (CASSANDRA-1553) warn of imbalanced ranges in nodetool ring
Date Fri, 19 Nov 2010 21:49:17 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-1553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12933992#action_12933992
] 

Brandon Williams edited comment on CASSANDRA-1553 at 11/19/10 4:47 PM:
-----------------------------------------------------------------------

Weird output with 0.6:

{noformat}
Address       Status     Load          Owns    Range                                     
Ring
                                       102855431326809200097386204650499263481    
10.179.64.227 Up         854 bytes     -39.80% 35142115559466303407164061620519096874    
|<--|
10.179.65.102 Up         854 bytes     17.72%  65295694165122757235402903158743316735    
|   |
10.179.111.137Up         854 bytes     22.08%  102855431326809200097386204650499263481   
|-->|
{noformat}

      was (Author: brandon.williams):
    Weird output with 0.6:


Address       Status     Load          Owns    Range                                     
Ring
                                       102855431326809200097386204650499263481    
10.179.64.227 Up         854 bytes     -39.80% 35142115559466303407164061620519096874    
|<--|
10.179.65.102 Up         854 bytes     17.72%  65295694165122757235402903158743316735    
|   |
10.179.111.137Up         854 bytes     22.08%  102855431326809200097386204650499263481   
|-->|

  
> warn of imbalanced ranges in nodetool ring
> ------------------------------------------
>
>                 Key: CASSANDRA-1553
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1553
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>            Reporter: Jonathan Ellis
>            Assignee: Jon Hermes
>            Priority: Minor
>             Fix For: 0.6.9, 0.7.0
>
>         Attachments: 1553-06-2.txt, 1553-06.txt, 1553.txt, ringer
>
>
> I'd like to enhance nodetool ring to show the % of the token range that it is responsible
for according to the partitioner (that is, before considering replication).  For RandomParitioner
this is easy.  For OPP we can estimate using describe_splits.  I'd also like to issue a warning
if any node N has more than 25% more of the ring than another node M.
> (The reason we need to use the range for this instead of load, is load may include an
arbitrary amount of data that no longer belongs to the node, pending removal by cleanup.)

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