@Matjia I think you either did not understand my question or I failed to explain it more clearly.
On Sat, Dec 17, 2016 at 4:46 PM, Matija Gobec <matija0...@gmail.com> wrote: > QUORUM is by documentation: > > quorum = (sum_of_replication_factors / 2) + 1 > > Its not fixed value (as 4). > > On Sat, Dec 17, 2016 at 10:21 PM, Kant Kodali <k...@peernova.com> wrote: > >> I keep hearing that the minimum number of Cassandra nodes required to >> achieve Quorum consensus is 4 I wonder why not 3? In fact, many container >> deployments by default seem to deploy 4 nodes. Can anyone shine some light >> on this? >> >> What happens if I have 3 nodes and replication factor of 3 and >> consistency level: quorum? I should be able to achieve quorum level >> consensus right. >> >> If Total node = 3, RF=2 and consistency level = Quorum. Then I understand >> the quorum level consensus is not possible because the number of replica >> nodes here are 2. >> This also brings up another question does number of replica nodes always >> have to be an odd number to achieve quorum level consensus? If so, what >> happens when a replica node goes down ? it would still serve the requests >> but the quorum level consensus is not possible? >> >> Thanks >> kant >> >> >> >> >> >> >
