Hello, The rule of thumb depends on your use case, particularly your consistency requirements. Typical configuration is to leverage RF3. Here's documentation on consistency levels: http://www.datastax.com/documentation/cassandra/1.2/cassandra/dml/dml_config_consistency_c.html
If you had a 3 node cluster with an RF 2, then 2 copies of data would exist on each node., i.e. you would have 2 copies of data in your cluster. Hope that helps. Jonathan Lacefield Solutions Architect, DataStax (404) 822 3487 <http://www.linkedin.com/in/jlacefield> <http://www.datastax.com/what-we-offer/products-services/training/virtual-training> On Fri, Mar 7, 2014 at 10:26 AM, Daniel Curry <daniel.cu...@arrayent.com>wrote: > I would like to know on what is the rule of thumb for > "replication_factor:" number? > I think the answer is depends on how many nodes one has? IE: three nodes > will be the > number 3. What would happen it I put the number 2 for a three node > cluster? > We are using both 3.2.4 and 3.1.3 ( that will be upgraded to 3.2.4). > > Thank you. > > -- > Daniel Curry > > Sr. Linux System Administrator, Network Operations > > PGP : AD5A 96DC 7556 A020 B8E7 0E4D 5D5E 9BA5 C83E 8C92 > > Arrayent, Inc. > 2317 Broadway Street, Suite 20 > Redwood City, CA 94063 > dan...@arrayent.com > 650-260-4520 > >
