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From Milind Parikh <>
Subject Re: Multi DC setup
Date Tue, 11 Oct 2011 05:17:14 GMT
Why have two rings? Cassandra manages the replication for ring
with physical nodes in two dc might be a better option. Of course, depending
on the inter-dc failure characteristics, might need to endure split-brain
for a while.

sent from my android...please pardon occasional typos as I respond @ the
speed of thought

On Oct 10, 2011 10:09 PM, "Cassa L" <> wrote:

I am trying to understand multi DC setup for cassandra. As I understand, in
this setup,  replicas exists in same cluster ring, but physically nodes are
distributed across DCs. Is this correct?
I have two different cluster rings in two DCs, and want to replicate data
bidirectionally. They both have same keyspace. They take  data traffic from
different sources, but we want to make sure, data exists in both the rings.
What could be the way to achieve this?


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