Yup, RF is 2 for both the datacenters.
On Mon, Jun 3, 2013 at 3:36 PM, Sylvain Lebresne <sylv...@datastax.com>wrote: > What's your replication factor? Do you have RF=2 on both datacenters? > > > On Mon, Jun 3, 2013 at 10:09 PM, srmore <comom...@gmail.com> wrote: > >> I am a bit confused when using the consistency level for multi datacenter >> setup. Following is my setup: >> >> I have 4 nodes the way these are set up are >> Node 1 DC 1 - N1DC1 >> Node 2 DC 1 - N2DC1 >> >> Node 1 DC 2 - N1DC2 >> Node 2 DC 2 - N2DC2 >> >> I setup a delay in between two datacenters (DC1 and DC2 around 1 sec one >> way) >> >> I am observing that when I use consistency level 2 for some reason the >> coordinate node is picking up the nodes from other datacenter. My >> understanding was that Cassandra picks up nodes which are close by (from >> local datacenter), determined by Gossip but looks like that's not the case. >> >> I found the following comment on Datastax website : >> >> "If using a consistency level of ONE or LOCAL_QUORUM, only the nodes in >> the same data center as the coordinator node must respond to the client >> request in order for the request to succeed." >> >> Does this mean that for multi datacenter we can only use ONE or >> LOCAL_QUORUM if we want to use the local datacenter to avoid cross >> datacenter latency. >> >> I am using the GossipingPropertyFileSnitch. >> >> Thanks ! >> >> >
