On Thu, Dec 5, 2013 at 3:31 PM, Jayadev Jayaraman <jdisal...@gmail.com>wrote:
> Availability zones are analogous to racks not data centres . EC2 regions > are equivalent to data centres. > Yes, this is what I meant. I guess my question is - is possible to put row in every rack using vnodes? Thank you, Andrey > On Dec 5, 2013 2:32 PM, "Andrey Ilinykh" <ailin...@gmail.com> wrote: > >> Hello everybody! >> We run cassandra 1.1 on ec2 instances. We use three availability zones, >> the replication factor is 3 also. NetworkTopologyStrategy guarantees each >> row is replicated in all availability zones. So, if we lost one zone quorum >> operations still work. We think about to upgrade to 1.2. Virtual nodes are >> the main reason. My understanding is - vnodes are distributed randomly, so >> their is no way to put every row into all availability zones. Am I right? >> What would be the best way to deploy vnodes across several data centers >> (availability zones)? >> >> >> Thank you, >> Andrey >> >
