If you have 4 Nodes with RF 4 then all data is on every node. So you can just slice the whole token range into 4 pieces and let each node process 1 slice. Determining local ranges also only helps if you read with CL_ONE.
2017-01-19 13:05 GMT+01:00 Frank Hughes <frankhughes...@gmail.com>: > Hello there, > > I'm running a 4 node cluster of Cassandra 3.9 with a replication factor of > 4. > > I want to be able to run a java process on each node only selecting a 25% > of the data on each node, > so i can process all of the data in parallel on each node. > > What is the best way to do this with the java driver ? > > I was assuming I could retrieve the token ranges for each node and page > through the data using these ranges, but this includes the replicated data. > I was hoping there was away of only selecting the data that a node is > responsible for and avoiding the replicated data. > > Many thanks for any help and guidance, > > Frank Hughes > -- Benjamin Roth Prokurist Jaumo GmbH · www.jaumo.com Wehrstraße 46 · 73035 Göppingen · Germany Phone +49 7161 304880-6 · Fax +49 7161 304880-1 AG Ulm · HRB 731058 · Managing Director: Jens Kammerer
