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https://issues.apache.org/jira/browse/CASSANDRA-4443?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis updated CASSANDRA-4443:
--------------------------------------
Assignee: Eric Evans
Eric has some notes up at http://wiki.apache.org/cassandra/VirtualNodes/Balance
on implementation but a wiki is a lousy discussion medium so I'll post here:
shuffle should operate on the entire cluster, at least by default. Shuffling
node at a time means that for each node i for i in 0..N-1 (where N is the
cluster size), i/N of the ranges shuffled will, on average, have been shuffled
at least once already. So it's substantially less efficient than shuffling
once, then assigning the vnodes out in one cluster-wide pass.
> shuffle utility for vnodes
> --------------------------
>
> Key: CASSANDRA-4443
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4443
> Project: Cassandra
> Issue Type: Sub-task
> Components: Core
> Affects Versions: 1.2
> Reporter: Brandon Williams
> Assignee: Eric Evans
> Fix For: 1.2
>
>
> As mentioned on CASSANDRA-4127, for upgrades we need a 'shuffle' command to
> split up the contiguous ranges.
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