The first thing I can think of is the initial_token for the node must be a valid token according to the configured partitioner, as the tokens created by the partitioner are the things stored the distributed hash tree. If you had a partitioner per KS you would need to configure the initial_token per KS.
Also it's not possible to change *ever* change the partitioner, so it would have to be excluded from the KS update. They are not show stoppers, just the firs things that come to mind. IIRC a lot of the other access happens in the context of a KS, their may be other issues but I've not checked the code. Anyone else ? ----------------- Aaron Morton Freelance Cassandra Developer @aaronmorton http://www.thelastpickle.com On 28/09/2011, at 8:28 PM, Philippe wrote: > Hi is there any reason why configuring a partitioner per keyspace wouldn't be > possible technically ? > > Thanks. >