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https://issues.apache.org/jira/browse/CASSANDRA-1427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12995545#comment-12995545
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Nick Bailey commented on CASSANDRA-1427:
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* In requestRanges, instead of passing a request count you should just use the
same strategy that streamRanges uses for counting down the latch.
* Hmm, I didn't notice this before but the fact that the new token in
loadbalance is calculated before the move changes things pretty significantly.
The fact that it left the ring before calculating a new token meant that it
would consider the load it was giving away when trying to pick a new token.
Honestly maybe we should just get rid of loadbalance since this a major version
change. If someone wants load balance they can manually decommission then
bootstrap. We should probably get someone else's opinion here.
* I've got to wonder if there is a better way to test this kind of stuff.
(Move/Remove/LeaveAndBootstrap)Test are all kind of ridiculous (It's sad that I
wrote one of them). Maybe we just need a separate task for figuring that out.
Also perhaps a ticket for making/updating the distributed test for this.
> 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-v2.patch, CASSANDRA-1427-v3.patch,
> CASSANDRA-1427-v4.patch, 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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