[jira] Resolved: (CASSANDRA-1086) Token range calculator

["Jonathan Ellis (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-1086?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Ellis resolved CASSANDRA-1086.
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    Fix Version/s:     (was: 0.6.3)
       Resolution: Won't Fix

What would be interesting is a calculator that computes the minimum number of moves to get to where the heaviest-loaded node is within N% of the least-loaded.  (I'd also like to see it in Java so you don't have to hardcode your ip/load info.)  I don't see how this script improves on the built-in bootstrap algorithm, since it's still single-node-oriented.

> Token range calculator
> ----------------------
>
>                 Key: CASSANDRA-1086
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1086
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Contrib
>            Reporter: Suhail Doshi
>            Priority: Trivial
>
> We found loadbalance and autobootstrapping to be sub-par in production; also very risky too if it guesses anything wrong.
> We created a simple Python script that I am sure can be greatly improved to be more automated but thought we'd throw it up here anyway:
> http://gist.github.com/399336
> In a nutshell: give it your current token ranges, the load for that range, and it'll suggest you the best token to help load balance your cluster when you decide to add a new node. We've used it countless times in production ourselves. Our way of contributing some small back to the community.

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