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From Arindam Barua <aba...@247-inc.com>
Subject RE: Can the seeds list be changed at runtime?
Date Wed, 30 Apr 2014 09:36:35 GMT

>> 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.reddy@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.Lu@emc.com<mailto:Boying.Lu@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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