On Thu, Dec 2, 2010 at 4:08 AM, Jake Maizel <j...@soundcloud.com> wrote: > Hello, > > We have a ring of 12 nodes with 6 in one data center and 6 in another. > We want to shutdown all 6 nodes in data center 1 in order to close > it down. We are using a replication factor of 3 and are using > RackAwareStrategy with version 0.6.6. > > We have been thinking that using decomission on each of the nodes in > the old data center one at a time would do the trick. Does this sound > reasonable?
That is the simplest approach. The major downside is that RackAwareStrategy guarantees you will have at least one copy of _each_ row in both DCs, so when you are down to 1 node in dc1 it will have a copy of all the data. If you have a small enough data volume to make this feasible then that is the option I would go with. > We have also been considering increasing the replication factor to 4 > and then just shutting down all the old nodes. Would that work as far > as data availability would go? Not sure what you are thinking of there, but probably not. :) -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of Riptano, the source for professional Cassandra support http://riptano.com
