How to specify different replica factors for different datacenters

[Origin Jing]

I am experimenting on multi-datacenter scylladb doployments. I read somewhere that it is possible to specify different replica factor for different datacenters, however I colud find the page now, please help.

[Shlomi Livne]

Jing Hi,

When using a multi-dc deployment - KEYSPACE defnition needs to be changed from using the SimpleStrategy - to NetworkTopologyStrategy. Using NetworkTopologyStrategy you can specify for each DC what replication is required.

for example if you have your cluster split over 2 DCs: "dc1","dc2".

CREATE KEYSPACE ks
  WITH REPLICATION = {'class' : 'NetworkTopologyStrategy', 'dc1' : 3, 'dc2' : 2};

Additional information on how to setup scylla for a multi-dc configuration can be found http://docs.scylladb.com/procedures/create_cluster_multidc/

On Mon, Apr 10, 2017 at 6:41 AM, Origin Jing <michael....@gmail.com> wrote:

I am experimenting on multi-datacenter scylladb doployments. I read somewhere that it is possible to specify different replica factor for different datacenters, however I colud find the page now, please help.

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