[jira] Commented: (CASSANDRA-1427) Optimize loadbalance/move for moves within the current range

["Nick Bailey (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-1427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12989241#comment-12989241 ] 

Nick Bailey commented on CASSANDRA-1427:
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bq. 1). What should we do with the ranges left on the node if we are moving to the completely new range (no intersection with old range), should we stream them to the ring?

We should just follow the same strategy decom uses. Any ranges that this node owned before the move should be streamed to anyone who will become a new replica for that data. 

bq. 2). Should we do 1). always (on any move)?

Yes.

> Optimize loadbalance/move for moves within the current range
> ------------------------------------------------------------
>
>                 Key: CASSANDRA-1427
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1427
>             Project: Cassandra
>          Issue Type: Sub-task
>          Components: Core
>    Affects Versions: 0.7 beta 1
>            Reporter: Nick Bailey
>            Assignee: Pavel Yaskevich
>             Fix For: 0.8
>
>         Attachments: CASSANDRA-1427.patch
>
>   Original Estimate: 42h
>          Time Spent: 42h
>  Remaining Estimate: 0h
>
> Currently our move/loadbalance operations only implement case 2 of the Ruhl algorithm described at https://issues.apache.org/jira/browse/CASSANDRA-192#action_12713079.
> We should add functionality to optimize moves that take/give ranges to a node's direct neighbors.

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