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Posted to user@cassandra.apache.org by Kanwar Sangha <ka...@mavenir.com> on 2013/03/01 03:19:31 UTC

NetworkTopology

Hi - Quick question. When specifying the replication across 2 DCs, can we have 1 replication factor across 2 Data centres ? Does the below mean that there will be 2 copies of the data , 1 in DC1 and 1 in DC2 ?

[default@unknown] CREATE KEYSPACE test
      WITH placement_strategy = 'NetworkTopologyStrategy'
      AND strategy_options={DC1:1,DC2:1};

So if I specify , DC1:2,DC2:2 - This means we have total 4 copies ? 2 in DC1 and 2 in DC2 ?



Thanks,
Kanwar

Re: NetworkTopology

Posted by Jabbar <aj...@gmail.com>.

Hello,

Yes you are right AFAIK.


On 1 March 2013 02:19, Kanwar Sangha <ka...@mavenir.com> wrote:

>  Hi – Quick question. When specifying the replication across 2 DCs, can
> we have 1 replication factor across 2 Data centres ? Does the below mean
> that there will be 2 copies of the data , 1 in DC1 and 1 in DC2 ?****
>
> ** **
>
> [default@unknown] CREATE KEYSPACE test****
>
>       WITH placement_strategy = 'NetworkTopologyStrategy'****
>
>       AND strategy_options={DC1:1,DC2:1};****
>
> ** **
>
> So if I specify , DC1:2,DC2:2 – This means we have total 4 copies ? 2 in
> DC1 and 2 in DC2 ?****
>
> ** **
>
> ** **
>
> ** **
>
> Thanks,****
>
> Kanwar****
>
> ** **
>
> ** **
>
> ** **
>
> ** **
>



-- 
Thanks

 A Jabbar Azam