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From Eric Gilmore <e...@datastax.com>
Subject Re: Seed Nodes
Date Wed, 02 Mar 2011 03:29:16 GMT
Yes, two per DC is a recommendation I've heard from Jonathan Ellis.  We put
that in yet more documentation
athttp://www.datastax.com/dev/tutorials/getting_started_0.7/configuring#seed-list(appreciate
the citation Aaron :)

I had a recent conversation with a Cassandra expert who had me convinced
that, as long as a node online already had one seed in its list at startup,
you wouldn't really need to restart it -- at least right away -- after
adding a second seed to the config.  Rather than confuse the issue by trying
to remember/recreate the rationale for that, I'll ping him and see if he'll
comment here.

On Tue, Mar 1, 2011 at 12:04 PM, Aaron Morton <aaron@thelastpickle.com>wrote:

> AFAIK it's recommended to have two seed nodes per dc.
>
> Some info on seeds here <http://www.datastax.com/docs/0.7/operations/clustering>
> http://www.datastax.com/docs/0.7/operations/clustering
>
> You will need a restart.
>
> Aaron
>
>
> On 2/03/2011, at 6:08 AM, shan.lu@accenture.com wrote:
>
>  How many seed nodes should I have for a cluster of 100 nodes each with
> about 500gb of data? Also to add seeds the nodes, must I change the seed
> nodes list on all existing nodes through the Cassandra.yaml file? Will
> changes take effect without restarting the node?
>
>
>
> *Shan (Susie) Lu,  *Analyst**
>
> Accenture Technology Labs - Silicon Valley **
>
> cell  +1 425.749.2546
>
> email *shan.lu@accenture.com <charles.nebolsky@accenture.com>*
>
>
>
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