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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-3517) Make auto bootstrap smarter
Date Fri, 25 Jan 2013 22:59:13 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13563131#comment-13563131
] 

Jonathan Ellis commented on CASSANDRA-3517:
-------------------------------------------

Obsoleted by vnodes.
                
> Make auto bootstrap smarter
> ---------------------------
>
>                 Key: CASSANDRA-3517
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3517
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Chris Goffinet
>            Priority: Minor
>
> Just wanted to create this before I forget. One of the things we noticed when we were
looking over the auto bootstrap code:
> When the bootstrapping node tries to determine its token, it looks at the ring for the
node with the most 'load'. It then sends a message to that node to split its range. The function
on that node will sample the keys to figure out where it should split the range. This can
actually be very bad. If you have a data model where you have very few keys, and very wide
rows the token it picks could be very bad. We should make this more auto bootstrap more intelligent
than just looking at the node with the most disk space.

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