On Wed, Feb 27, 2019 at 3:11 PM Durity, Sean R <sean_r_dur...@homedepot.com> wrote:
> We use the PropertyFileSnitch precisely because it is the same on every > node. If each node has to have a different file (for GPFS) – deployment is > more complicated. (And for any automated configuration you would have a > list of hosts and DC/rack information to compile anyway) > > > > I do put UNKNOWN as the default DC so that any missed node easily appears > in its own unused DC. > Alright, it obviously makes a lot of difference which snitch to use. We are deploying to EC2, so we are using the EC2 snitches at all times. I guess some complexity is hidden from us by these custom implementations. At the same time, we do try to assign IP addresses in a predictable manner when deploying a new cluster, in order to fix the list of seed nodes in advance (we wouldn't care about the rest of nodes). So I think, for the original question: careful when changing IP address of seeds nodes. Probably you want to start with non-seeds and promote some of them to seeds before you start changing IP addresses of the old seeds. -- Alex
