Re: Expanding 0.6.x cluster to multiple datacenters

2011-07-28 Thread Ashley Martens
Okay. So what happens when I try to add a third DC? Since we would be using RAS any new node would get the entire dataset. On Jul 28, 2011, at 5:49, Jonathan Ellis wrote: > The steps are the same for RUS -> RAS no matter what version of > Cassandra you are on, but 0.7 introduced NTS which is d

Re: Expanding 0.6.x cluster to multiple datacenters

2011-07-28 Thread Jonathan Ellis
The steps are the same for RUS -> RAS no matter what version of Cassandra you are on, but 0.7 introduced NTS which is designed to make adding datacenters easier. On Thu, Jul 28, 2011 at 6:57 AM, Ashley Martens wrote: > Thank you. For 0.7 are the steps similar? > > > > On Jul 27, 2011, at 19:56, J

Re: Expanding 0.6.x cluster to multiple datacenters

2011-07-28 Thread Ashley Martens
Thank you. For 0.7 are the steps similar? On Jul 27, 2011, at 19:56, Jonathan Ellis wrote: > As you know, with 0.6 adding a datacenter is not as easy as 0.7 with > NetworkTopologyStrategy. With 0.6 there is a right way that will work > with some manual effort, and a wrong way that can cause y

Re: Expanding 0.6.x cluster to multiple datacenters

2011-07-27 Thread Jonathan Ellis
As you know, with 0.6 adding a datacenter is not as easy as 0.7 with NetworkTopologyStrategy. With 0.6 there is a right way that will work with some manual effort, and a wrong way that can cause you major pain and grief. The right way: - Switch to a DC-aware snitch but leave your cluster on RUS t

Expanding 0.6.x cluster to multiple datacenters

2011-07-27 Thread Ashley Martens
I have a current 0.6.x cluster in a single datacenter with RackUnaware and am looking to expand into a second data center. I know I need to change to RackAwareStrategy however, I'm not sure what will happen to my data when I restart the nodes in the current cluster before I even add the new DC. Wil