Cassandra implement in two different data-center

[Adeel Akbar <ad...@panasiangroup.com>]

Dear All,

I am going to implement Apache Cassandra in two different data-center 
with 2 nodes in each ring.  I also need to set replica 2 factor in same 
data center. Over the data center data should be replicates between both 
data center rings. Please help me or provide any document which help to 
implement this model.
-- 


Thanks & Regards

*Adeel**Akbar*

Re: Cassandra implement in two different data-center

[Aaron Turner <sy...@gmail.com>]

On Thu, Aug 30, 2012 at 1:14 AM, Adeel Akbar
<ad...@panasiangroup.com> wrote:
> Dear All,
>
> I am going to implement Apache Cassandra in two different data-center with 2
> nodes in each ring.  I also need to set replica 2 factor in same data
> center. Over the data center data should be replicates between both data
> center rings. Please help me or provide any document which help to implement
> this model.

http://www.datastax.com/docs/1.1/initialize/cluster_init_multi_dc

has good info on building a multi-DC cluster.

That said, 2 nodes per-DC means you can't use LOCAL_QUORUM/QUORUM for
read & writes.  I would strongly suggest 3 nodes per DC if you care
about consistent reads.  Generally speaking, 3 nodes per-DC is
considered the recommended minimum number of nodes for a production
system.



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Aaron Turner
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