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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