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https://issues.apache.org/jira/browse/CASSANDRA-3047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13402644#comment-13402644
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David Alves commented on CASSANDRA-3047:
----------------------------------------
thanks for the review and for the clues. code is much more succinct with
topology and getRangesForEndpoint.
final question, since we're changing the mapping to a per endpoint basis should
we keep showing the tokens, or do something that would work straight out with
vnodes such as (per dc):
{code}
Address DC Rack Status State Load Owns
Num. Ranges RangeIds
127.0.0.4 DC3 RAC1 Up Normal 52.76 KB 75.00%
1 0
127.0.0.5 DC3 RAC1 Up Normal 54.46 KB 75.00%
1 1
127.0.0.6 DC3 RAC2 Up Normal 52.78 KB 75.00%
1 2
127.0.0.7 DC3 RAC2 Up Normal 52.78 KB 75.00%
1 3
{code}
where range id is the position in the token ring starting from 0 and then allow
to get the token delimiters for a range with another command (or get all for an
endpoint?).
> implementations of IPartitioner.describeOwnership() are not DC aware
> --------------------------------------------------------------------
>
> Key: CASSANDRA-3047
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3047
> Project: Cassandra
> Issue Type: Improvement
> Components: Tools
> Reporter: Aaron Morton
> Assignee: David Alves
> Priority: Trivial
> Fix For: 1.1.2
>
> Attachments: CASSANDRA-3047.patch, CASSANDRA-3047.patch,
> CASSANDRA-3047.patch, CASSANDRA-3047.patch
>
>
> see http://www.mail-archive.com/user@cassandra.apache.org/msg16375.html
> When a cluster the multiple rings approach to tokens the output from nodetool
> ring is incorrect.
> When it uses the interleaved token approach (e.g. dc1, dc2, dc1, dc2) it will
> be correct.
> It's a bit hacky but could we special case (RP) tokens that are off by 1 and
> calculate the ownership per dc ? I guess another approach would be to add
> some parameters so the partitioner can be told about the token assignment
> strategy.
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