If you have two nodes, and RF 2, you will only be able to use eventual consistency. If you want to have stronger consistency and some redundancy 3 nodes is the minimum requirement.
In the current setup, with only 2 nodes, I would use RAID 10 as it requires less operator intervention and there is a chance of data loss with RF 2. If a write (including the hints) is only committed to one node and the disk on that node fails the write will be lost. Hope that helps. ----------------- Aaron Morton New Zealand @aaronmorton Co-Founder & Principal Consultant Apache Cassandra Consulting http://www.thelastpickle.com On 11/12/2013, at 9:33 pm, Veysel Taşçıoğlu <veysel.tascio...@gmail.com> wrote: > Hi, > > What about using JBOD and replication factor 2? > > Regards. > > On 11 Dec 2013 02:03, "cem" <cayiro...@gmail.com> wrote: > Hi all, > > I need to setup 2 nodes Cassandra cluster. I know that Datastax recommends > using JBOD as a disk configuration and have replication for the redundancy. I > was planning to use RAID 10 but using JBOD can save 50% disk space and > increase the performance . But I am not sure I should use JBOD with 2 nodes > cluster since there is a higher chance to lose 50% of our cluster compare to > a larger cluster. I may prefer to have stronger nodes if I have limited > number of nodes. > > What do you think about that? Is there anyone who has 2 nodes cluster? > > > > Best Regards, > > Cem >
