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From ChingShen <chingshenc...@gmail.com>
Subject Re: Which node is coordinator node?
Date Wed, 07 Jul 2010 06:06:44 GMT
Thanks aaron morton,

   I have an another question about replication. if I run a write operation
on A node and how does the replication work?  A node dispatches three
request to B, C and D nodes respectively to do write operation? or A node
dispatches a request to B node, then B node forwards it to C node, finally,
C node forwards it to D node?

Thanks.

Shen

On Tue, Jul 6, 2010 at 8:04 PM, aaron morton <aaron@thelastpickle.com>wrote:

> Which ever node the client connects to is the coordinator node. It will
> take care of sending the messages to the nodes who will do the actual work.
>
> If you have multiple nodes try a DNS round robin to distribute client
> connections around.
> Aaron
> On 6 Jul 2010, at 22:10, ChingShen wrote:
>
> > Hi all,
> >
> >   I'm newbie in Cassandra, I have a question about which node is
> coordinator node in my cluster.
> >
> > I have A, B, C, D, E, F and G nodes. if I run a write operation on "A"
> node, and key range between A and B, so the A node is responsible to write
> the key to B, C and D nodes(RF=3) ? and does it mean A node is coordinator
> node?
> >
> > Thanks.
> >
> > Shen
>
>

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