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From AJ ...@dude.podzone.net>
Subject Docs: Token Selection
Date Tue, 14 Jun 2011 22:47:01 GMT
This http://wiki.apache.org/cassandra/Operations#Token_selection  says:

"With NetworkTopologyStrategy, you should calculate the tokens the nodes 
in each DC independantly."

and gives the example:

DC1
node 1 = 0
node 2 = 85070591730234615865843651857942052864

DC2
node 3 = 1
node 4 = 85070591730234615865843651857942052865


So, according to the above, the token ranges would be (abbreviated nums):

DC1
node 1 = 0	Range: (8..4, 16], (0, 0]
node 2 = 8..4	Range: (0, 8..4]

DC2
node 3 = 1	Range: (8..5, 16], (0, 1]
node 4 = 8..5	Range: (1, 8..5]


If the above is correct, then I would be surprised as this paragraph is 
the only place were one would discover this and may be easy to miss... 
unless there's a doc buried somewhere in plain view that I missed.

So, have I interpreted this paragraph correctly?  Was this design to 
help keep data somewhat localized if that was important, such as a 
geographically dispersed DC?

Thanks!

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