On Wed, Jan 5, 2011 at 3:37 AM, Narendra Sharma <narendra.sha...@gmail.com> wrote: > What I am looking for is: > 1. Some way to send requests for keys whose token fall between 0-25 to B and > never to C even though C will have the data due to it being replica of B. > 2. Only when B is down or not reachable, the request should go to C. > 3. Once the requests start going to C, they should continue unless C is down > and in which case the requests should then go to B. > > My understanding is that SimpleSnitch should fit here except for the > enforcing #3 above.
Right, with the caveat that you'll probably want to set the dynamic snitch badness threshold to allow switching to B even if C merely gets overloaded rather than completely down. The alternative is disabling the dynamic snitch entirely. > will SimpleSnitch come into > picture if the request from client reaches node C directly? Yes. -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of Riptano, the source for professional Cassandra support http://riptano.com
