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Date: Thu, 12 May 2011 10:18:04 +0200
Message-ID: <BANLkTimfj0F3SRF1UZX=DZXayVD_ymR90Q@mail.gmail.com>
Subject: Re: network topology issue
From: Sylvain Lebresne <sylvain@datastax.com>
To: user@cassandra.apache.org
Cc: anurag.gujral@gmail.com
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On Thu, May 12, 2011 at 1:58 AM, Anurag Gujral <anurag.gujral@gmail.com> wr=
ote:
> Hi All,
> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 I am testing network topology strate=
gy in cassandra I am using
> two nodes , one node each in different data center.
> Since the nodes are in different dc I assigned token 0 to both the nodes.
> I added both the nodes as seeds in the cassandra.yaml and=A0 I am=A0 usin=
g
> properyfilesnitch as endpoint snitch where I have specified the colo
> details.
>
> I started first node then I when I restarted second node I got an error t=
hat
> token "0" is already being used.Why am I getting this error.

You cannot have two nodes with the same token, so you'll have to use "0" an=
d
"1" for instance. It's true that with NTS you have to think of each datacen=
ter
as a separate ring, but there is still this restriction that each token mus=
t be
different across the whole cluster.

>
> Second Question: I already have cassandra running in two different data
> centers I want to add a new keyspace which uses networkTopology strategy
> in the light of above errors how can I accomplish this.
>
>
> Thanks
> Anurag
>