Hi Jonathan,QUORUM = (sum_of_replication_factors / 2) + 1, For us Quorum =
(2/2) +1 = 2.
Default CL is ONE and RF=2 with Two Nodes in the cluster.(I am little
confused, what is my read CL and what is my WRITE CL?)
So, does it mean that for every WRITE it will write in both the nodes?
and For
CL quorum with RF2 is equivalent to ALL, writes will require
acknowledgement from both nodes, and reads will be from both nodes.
CL one will write to both replicas, but return success as soon as the first
one responds, read will be from one node ( load balancing strategy
determines which one).
Thanks Ryan.
So, as Jonathan recommended, we should have RF=3 with Three nodes.
So Quorum = 2 so, CL= 2 (or I need the CL to be set to two) and I will not
need the downgrading retry policy, in case if my one node goes down.
I can dynamically add a New node to my Cluster.
Can I change my RF to 3,
you'll have to run repair and that will involve some load and streaming,
but this is a normal use case for cassandra..and your cluster should be
sized load wise to allow repair, and bootstrapping of new nodes..otherwise
when you're over whelmed you won't be able to add more nodes easily.
If you
thanks Ryan.. We will get a new node and add it in the cluster. I will mail
if I have any question regarding the same.
On Tue, Dec 16, 2014 at 10:52 PM, Ryan Svihla rsvi...@datastax.com wrote:
you'll have to run repair and that will involve some load and streaming,
but this is a normal use
Thanks very much Jonathan !!
On Wed, Dec 10, 2014 at 1:00 PM, Jonathan Haddad j...@jonhaddad.com wrote:
I did a presentation on diagnosing performance problems in production at
the US Euro summits, in which I covered quite a few tools preventative
measures you should know when running a
Hi,
We have Two Node Cluster Configuration in production with RF=2.
Which means that the data is written in both the clusters and it's running
for about a month now and has good amount of data.
Questions?
1. What are the best practices for maintenance?
2. Is OPScenter required to be installed or
I did a presentation on diagnosing performance problems in production at
the US Euro summits, in which I covered quite a few tools preventative
measures you should know when running a production cluster. You may find
it useful:
