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https://issues.apache.org/jira/browse/CASSANDRA-385?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12762814#action_12762814
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Jonathan Ellis commented on CASSANDRA-385:
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there's a couple motivations there:
- i believe this same method call will be a good fit for Hadoop asking for
input splits, so it will still be client-facing as well. the convention is
safe, or will be :)
- RPC is a better fit for this than messagingservice's callback-oriented
approach, since we do want to block the bootstrap until getting an answer
how bad is the thriftAddress pain going to be?
> intellibootstrap
> ----------------
>
> Key: CASSANDRA-385
> URL: https://issues.apache.org/jira/browse/CASSANDRA-385
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: Jonathan Ellis
> Fix For: 0.5
>
> Attachments: 0001-CASSANDRA-385-clean-up-loadinfo-and-SLB.txt,
> 0002-make-LoadInfo-a-double-instead-of-going-from-long-s.txt,
> 0003-move-javadoc-into-mbean.-inline-methods-where-wrappin.txt,
> 0004-use-Strings-instead-of-Endpoints-in-jmx-methods.-merge.txt,
> 0005-add-getLoadMap-jmx-method-add-load-info-to-nodeprobe.txt,
> 0006-get-token-on-bootstrap-that-gives-us-half-of-the-keys.txt
>
>
> ideally bootstrap mode should determine its new position on the ring by
> examining the Load of the existing nodes in the cluster. (currently Load is
> just disk space used but making this pluggable is another ticket.) having
> found the highest-load-node-that-is-not-participating-in-bootstrap, it should
> ask that node for a Token which would move half the keys over to the new node.
> This is easily computed since we have a periodic sampling of keys in memory
> of all the keys on disk, and even SSTable.getIndexedKeys that merges all such
> keys. So pick the midpoint, and turn it into a token (these are decorated
> keys so that is always possible).
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