>> For new nodes that you want to bootstrap into the cluster you can specify 
>> any nodes you wish.

Note that you want to keep your seed list consistent across your cluster though.

From: Mark Reddy [mailto:mark.re...@boxever.com]
Sent: Tuesday, April 29, 2014 2:26 AM
To: user@cassandra.apache.org
Subject: Re: Can the seeds list be changed at runtime?

Hi Boying,

From Datastax documentation: 
http://www.datastax.com/documentation/cassandra/1.2/cassandra/architecture/architectureGossipAbout_c.html
The seed node designation has no purpose other than bootstrapping the gossip 
process for new nodes joining the cluster. Seed nodes are not a single point of 
failure, nor do they have any other special purpose in cluster operations 
beyond the bootstrapping of nodes.

For this reason you can change the seed list on existing node at any time, as 
the node itself will already be aware of the cluster and would not need to rely 
on the seed list to join. For new nodes that you want to bootstrap into the 
cluster you can specify any nodes you wish.


Mark

On Tue, Apr 29, 2014 at 2:57 AM, Lu, Boying 
<boying...@emc.com<mailto:boying...@emc.com>> wrote:
Hi, All,

I wonder if I can change the seeds list at runtime. i.e. without change the 
yaml file and restart DB service?

Thanks

Boying


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