On Mon, Jun 14, 2010 at 11:03 PM, Masood Mortazavi <masoodmortaz...@gmail.com> wrote: > The comment on the top of RackAwareStrategy says:
You are correct. RAS sort of works under other conditions but it is primarily intended for 2 DCs and RF=3. I will update the comment in question. > There are other issues to think about. For example, for quorum write > (consistency.quorum) to work faster, shouldn't the first replicas be as > close as possible (i.e. on the same rack)? The whole point of choosing this > level of consistency is to improve performance. Right? No, the point is to improve reliability (there are a number of failure scenarios that will result in losing an entire rack at once). -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of Riptano, the source for professional Cassandra support http://riptano.com
