Have a requirement, where data is spread across multiple DC for disaster recovery. So I would use the NTS, that is clear, but I have some questions with this scenario
So if that is my requirement what consistency Level should I be using for my writes? Is that even possible with NTS or another strategy? I could use the SimpleStrategy with Quorum, but that would mean sending 2 copies (instead of 1 per DC that NTS uses to optimize on WAN traffic) to remote DC (since it does not understand DC's)?
- I have 2 Data Centers
RF - 2 (active DC) , 2 (passive DC)
- with NTS - Consistency level options are - LOCAL_QUORUM and EACH _QUORUM
- I want LOCAL_QUORUM and 1 remote copy (not 2) for write to succeed, if I used EACH_QUORUM - it would mean that I need both the remote nodes up (as I understand from http://www.datastax.com/docs/0.8/operations/datacenter).