Yes , RF=3 in existing datacenters DC1 & DC2 and going to be same RF in new datacenter DC3 which I'm going to add.
On Sat, Aug 27, 2016 at 11:15 PM, Alexander DEJANOVSKI < adejanov...@gmail.com> wrote: > Reads at quorum in dc3 will involve dc1 and dc2 as they will require a > response from more than half the replicas throughout the Cluster. > > If you're using RF=3 in each DC, each read will need at least 5 responses, > which DC3 cannot provide on its own. > > You can have troubles if DC3 has more than half then replicas, but I > guess/hope it is not the case, otherwise you're fine. > > You would be in trouble though if you were using local_quorum on DC3 or > ONE on any DC. > > > > Le sam. 27 août 2016 19:11, Surbhi Gupta <surbhi.gupt...@gmail.com> a > écrit : > >> Yes, it will have issue during the time new nodes are building.... >> So it is always advised to use LOCAL_QUORUM instead of QUORUM and >> LOCAL_ONE instead of ONE >> >> On 27 August 2016 at 09:45, laxmikanth sadula <laxmikanth...@gmail.com> >> wrote: >> >>> Hi, >>> >>> I'm going to add a new data center DC3 to an existing cassandra cluster >>> which has already 2 data centers DC1 , DC2. >>> >>> The thing I'm worried of is about tables in one keyspace which has >>> QUORUM reads and NOT LOCAL_QUORUM. >>> So while adding a new data centers with auto_bootstrap:false and >>> 'nodetool rebuild' , will the queries to tables in this keyspace will have >>> any issue ? >>> >>> Thanks in advance. >>> >>> -- >>> Regards, >>> Laxmikanth >>> >> >> -- Regards, Laxmikanth 99621 38051
