Re: quick questions

you got it! that's what I was looking for from that part of my question. thanks!! On Sun, Dec 18, 2016 at 2:08 PM, DE VITO Dominique < dominique.dev...@thalesgroup.com> wrote: > Ø I keep hearing that the minimum number of Cassandra nodes required to > achieve Quorum consensus is 4 I wonder

RE: quick questions

Ø 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? I think it may be due to the following (note : I am assuming,

Re: quick questions

Thanks! got it! On Sat, Dec 17, 2016 at 5:02 PM, Max C wrote: > As Matija mentioned, quorum is RF / 2 + 1: > > RF=1, Quorum = 1 > RF=2, Quorum = 2 > RF=3, Quorum = 2 > RF=4, Quorum = 3 > RF=5, Quorum = 3 > RF=6, Quorum = 4 > RF=7, Quorum = 4 > > So no, you don’t have to

Re: quick questions

As Matija mentioned, quorum is RF / 2 + 1: RF=1, Quorum = 1 RF=2, Quorum = 2 RF=3, Quorum = 2 RF=4, Quorum = 3 RF=5, Quorum = 3 RF=6, Quorum = 4 RF=7, Quorum = 4 So no, you don’t have to have an odd RF to achieve a quorum, as you see above. Most people use RF=3 with a minimum of 3 nodes,

Re: quick questions

@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 wrote: > QUORUM is by documentation: > > quorum = (sum_of_replication_factors / 2) + 1 > > Its not fixed value (as 4). > > On

Re: quick questions

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 wrote: > I keep hearing that the minimum number of Cassandra nodes required to > achieve Quorum consensus is 4 I wonder why