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From Eric Gilmore <e...@datastax.com>
Subject Re: Multiple Seeds
Date Wed, 23 Feb 2011 19:47:11 GMT
Well -- when you first bring a node into a ring, you will probably want to
stream data to it with auto_bootstrap: true.

If you want that node to be a seed, then add it to the seeds list AFTER it
has joined the ring.

I'd refer you to the "Seed List" and "Autoboostrapping" sections of the
Getting Started guide, which contain the following blurbs:

*There is no strict rule to determine which hosts need to be listed as
seeds, but all nodes in a cluster need the same seed list. For a production
deployment, DataStax recommends two seeds per data center.*
*
*

*An autobootstrapping node cannot have itself in the list of seeds nor can
it contain an initial_token<http://www.datastax.com/docs/0.7/configuration/storage_configuration#initial-token>already
claimed by another node. To add new seeds, autobootstrap the nodes
first, and then configure them as seeds.*





On Wed, Feb 23, 2011 at 11:39 AM, <Jeremy.Truelove@barclayscapital.com>wrote:

> So all seeds should always be set to 'auto_bootstrap: false' in their .yaml
> file.
>
> -----Original Message-----
> From: Edward Capriolo [mailto:edlinuxguru@gmail.com]
> Sent: Wednesday, February 23, 2011 2:36 PM
> To: user@cassandra.apache.org
> Cc: Truelove, Jeremy: IT (NYK)
> Subject: Re: Multiple Seeds
>
> On Wed, Feb 23, 2011 at 2:30 PM,  <Jeremy.Truelove@barclayscapital.com>
> wrote:
> > Yeah I set the tokens, I'm more asking if I start the first seed node
> with
> > autobootstrap set to false the second seed should have it set to true as
> > well as all the slave nodes correct? I didn't see this in the docs but I
> may
> > have just missed it.
> >
> >
> >
> > From: Eric Gilmore [mailto:eric@datastax.com]
> > Sent: Wednesday, February 23, 2011 2:24 PM
> > To: user@cassandra.apache.org
> > Subject: Re: Multiple Seeds
> >
> >
> >
> > The DataStax documentation offers some answers to those questions in the
> > Getting Started section and the Clustering reference docs.
> >
> > Autobootstrap should be true, but with the important caveat that
> > intial_token values should be specified.  Have a look at those docs, and
> > please give feedback on how helpful they are/aren't.
> >
> > Regards,
> >
> > Eric Gilmore
> >
> > On Wed, Feb 23, 2011 at 11:15 AM, <Jeremy.Truelove@barclayscapital.com>
> > wrote:
> >
> > What's the best way to bring multiple seeds up, should only one of them
> have
> > auto bootstrap set to true or should neither of them? Should they list
> > themselves and the other seed in their seed section in the yaml config?
> >
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>
> If a node is defined as a seeds it will never auto bootstrap. After it
> has bootstrapped and has a system table you can set its yaml file as a
> seed if you wish.
>

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