Hi guys.

Thanks for your reply.

Is this because the versions are very far from each other (e.g. Different major versions) Or as a rule of thumb, all nodes in a cluster, even in different DC's MUST have the same version?

Regards

Carlos Alonso | Software Engineer | @calonso

On 28 September 2015 at 19:13, Robert Coli <rcoli@eventbrite.com> wrote:
On Mon, Sep 28, 2015 at 5:29 AM, Carlos Alonso <info@mrcalonso.com> wrote:
I have a very old cassandra cluster 1.2.19 and I'm looking to add a new datacenter to it for analytics purposes in a newer version, let's say 2.1.8. Will those DC's communicate properly?

As Jonathan suggests :

1) Upgrade your existing cluster to 2.1.X
2) Then add an additional DC for analytics

=Rob