We use anywhere from 3-5 seeds for clusters that have over 150 nodes. That should suffice for larger sizes too since they are only for initial discovery.

Avinash

On Sat, Apr 3, 2010 at 9:19 AM, Benjamin Black <b@b3k.us> wrote:
Seeds are used for ring discovery, so there really isn't a load
concern for them, afaict.  Have enough to meet your availability
needs, including placement, and rock out.

On Sat, Apr 3, 2010 at 9:01 AM, Joseph Ruscio <jruscio@gmail.com> wrote:
> Ben,
>
> Great, was looking for something like this just the other day. One question I'm still unclear on, when setting up multiple nodes, say 4-8 (or more) what's the suggested ratio of seed vs. non-seed nodes?
>
> thanks,
> Joe
>
> On Apr 3, 2010, at 1:14 AM, Benjamin Black wrote:
>
>> Just added this to the wiki as it seemed a very frequent request on
>> irc: http://wiki.apache.org/cassandra/MultinodeCluster
>>
>> Would very much appreciate feedback and edits to improve it.
>>
>>
>> b
>
>