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From "Coe, Robin" <robin....@bluecoat.com>
Subject RE: RE: Why seed can't startup in Bootstrap mode ?
Date Wed, 23 Dec 2009 15:20:42 GMT
> Yes, although IMO to avoid confusion you will want to re-standardize on a single set of
seeds as soon as possible.

Sounds like the behaviour of seeds needs to be explained in the Operations guide.  E.g., under
what conditions would it be necessary to do anything with A other than restart it?  Are there
use cases that govern changing the seeds:
	1. why you would need to change the seeds
	2. what operations would be involved to reconfigure the cluster?

In a fully operational cluster, is there any special logic attached to a seed that can't be
accommodated by a node that gets bootstrapped?

-Robin.

-----Original Message-----
From: Jonathan Ellis [mailto:jbellis@gmail.com] 
Sent: December 23, 2009 9:47 AM
To: cassandra-user@incubator.apache.org
Subject: Re: RE: Why seed can't startup in Bootstrap mode ?

2009/12/23 XL.Pan <pan_xiaolei@sina.com>:
> I think you can avoid this , eg :
> A, B, C is seed node and D, E is non-seed. A crash and damage.
>
> 1) re-configure the node A to a non-seed;
> 2) starting the non-seed nood A will re-bootstrap;
> 3) Though the original seed nodes will decrease 1, any other node, eg D, can re-configure
other nodes, eg B, C, E, as seed nodes.
> 4) Then the seed nodes in the ring will be :
> Node->Seeds List
> A --> B, C, D;
> B --> A, B, C;
> C --> A, B, C;
> D --> B, C, E;
> E --> A, B, C;
>
> Am I right??  ;-)

Yes, although IMO to avoid confusion you will want to re-standardize
on a single set of seeds as soon as possible.

-Jonathan

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