[jira] [Updated] (CASSANDRA-2917) expose calculate midrange for token in jmx

["Sam Tunnicliffe (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-2917?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sam Tunnicliffe updated CASSANDRA-2917:
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    Attachment: trunk-2917.txt
    
> expose calculate midrange for token in jmx
> ------------------------------------------
>
>                 Key: CASSANDRA-2917
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2917
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Jackson Chung
>            Priority: Minor
>              Labels: lhf
>         Attachments: trunk-2917.txt
>
>
> currently there is no easy way to get midrange, especially for OPP. For simplicity, you could call OrderPreservingPartitioner.midpoint(Token, Token), that gives you a rough estimate (and you'd still need to remove non-utf8 characters.)
> A more accurate but difficult way is to sample the keys in that range and pick the midpoint of those. We should expose that via jmx, because without this, supporting OPP w/o this is quite challenging.

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