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Posted to commits@cassandra.apache.org by "Jon Hermes (JIRA)" <ji...@apache.org> on 2010/11/10 03:41:24 UTC
[jira] Commented: (CASSANDRA-1553) warn of imbalanced ranges in
nodetool ring
[ https://issues.apache.org/jira/browse/CASSANDRA-1553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12930452#action_12930452 ]
Jon Hermes commented on CASSANDRA-1553:
---------------------------------------
{noformat}
$ bin/nodetool -h localhost ring
Address Status State Load Owns Token
155711579810515450140957394391963122371
127.0.0.2 Up Normal 7.57 KB 41.54% 56247759826792015654375534268862190753
127.0.0.3 Up Normal 7.57 KB 09.70% 72749652544211640932560301980848705886
127.0.0.1 Up Normal 7.57 KB 48.76% 155711579810515450140957394391963122371
$ bin/nodetool -h localhost ring
Address Status State Load Owns Token
164941942527574387143433761941151641333
127.0.0.1 Up Normal 10.27 KB 19.68% 28276783988490678116658263059846526307
127.0.0.3 Up Normal 10.27 KB 73.39% 153144415326481392832217809981610293616
127.0.0.2 Up Normal 10.27 KB 06.93% 164941942527574387143433761941151641333
$ bin/nodetool -h localhost ring
Address Status State Load Owns Token
74848299015461299193324859323238443723
127.0.0.2 Up Normal 10.27 KB 83.77% 47232172623663922874593218770379172593
127.0.0.1 Up Normal 10.27 KB 14.59% 72053652013445961630779772805427567567
127.0.0.3 Up Normal 10.27 KB 01.64% 74848299015461299193324859323238443723
{noformat}
Cutting the "issue a warning if..." by jbellis request.
Current progress: writing test cases for RP and OPP describeOwnership() methods now. Gotta show off the shinies first, of course.
> 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: 0.6.7, 0.7.1
>
> Attachments: 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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