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From Sylvain Lebresne <>
Subject Re: random partitioner and key scan
Date Sat, 21 Jul 2012 10:07:56 GMT
> I don't know much about Cassandra internals, but from a user point of
> view, a scan for a range of tokens is not a common use-case.

All of boostrap/move/decommission/repair rely heavily on being able to
scan efficiently a range of token. Otherwise, a
boostrap/move/decommission/repair of a node would require the node and
all the nodes that share some data with it would have to read all
their data (to extract the correct token range). This would have a
hugely detrimental impact of the performance of those operations and
is therefore not an option.


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