incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jabbar Azam <aja...@gmail.com>
Subject Re: multiple Datacenter values in PropertyFileSnitch
Date Thu, 11 Apr 2013 13:47:11 GMT
Hello,

I'm not an expert but I don't think you can do what you want. The way to
separate data for applications on the same cluster is to use different
tables for different applications or use multiple keyspaces, a keyspace per
application. The replication factor you specify for each keyspace specifies
how many copies of the data are stored in each datacenter.

You can't specify that data for a particular application is stored on a
specific node, unless that node is in its own cluster.

I think of a cassandra cluster as a shared resource where all the
applications have access to all the nodes in the cluster.


Thanks

Jabbar Azam


On 11 April 2013 14:13, Matthias Zeilinger <Matthias.Zeilinger@bwinparty.com
> wrote:

>  Hi,****
>
> ** **
>
> I would like to create big cluster for many applications.****
>
> Within this cluster I would like to separate the data for each
> application, which can be easily done via different virtual datacenters and
> the correct replication strategy.****
>
> What I would like to know, if I can specify for 1 node multiple values in
> the PropertyFileSnitch configuration, so that I can use 1 node for more
> applications?****
>
> For example:****
>
> 6 nodes:****
>
> 3 for App A****
>
> 3 for App B****
>
> 4 for App C****
>
> ** **
>
> I want to have such a configuration:****
>
> Node 1 – DC-A& DC-C****
>
> Node 2 – DC-B & DC-C****
>
> Node 3 – DC-A & DC-C****
>
> Node 4 – DC-B & DC-C****
>
> Node 5 – DC-A****
>
> Node 6 – DC-B****
>
> ** **
>
> Is this possible or does anyone have another solution for this?****
>
> ** **
>
> ** **
>
> Thx & br matthias****
>

Mime
View raw message