cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jeff Jirsa <>
Subject Re: Changing existing Cassandra cluster from single rack configuration to multi racks configuration
Date Tue, 12 Mar 2019 17:46:18 GMT
On Tue, Mar 12, 2019 at 5:28 PM Justin Sanciangco
<> wrote:

> I would recommend that you do not go into a 3 rack single dc
> implementation with only 6 nodes. If a node goes down in this situation,
> the node that is paired with the node that is downed will have to service
> all of the load instead of being evenly distributed throughout the cluster.
> While its conceptually nice to have 3 rack implementation, it does have
> some negative implications when not at a proper node count.

This isn't true unless you query at ALL. If you query at (local_)quorum,
the snitch will choose the fastest replicas, which probably means favoring
the other two racks.

View raw message