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From Rajesh Kishore <rajesh10si...@gmail.com>
Subject Re: Deployment
Date Sat, 12 Jan 2019 11:32:36 GMT
Application would send request to one of the node(called as coordinating
node) & this coordinating node is aware of where your result
lies(considering you have modelled your DB correctly, it should not result
in scatter& gather kind of stuff) and thus delegate the query to respective
node, so it does follow client server architecture & your assumption is
correct.
As per my knowledge , generally application should be unaware where your
result lies & must not be tied to a specific node because it would have
bigger implications when stuffs like re-balancing would occur. So, your
application should be unaware where your data lies (in which node I meant),
but obviously keeping application in same region as that of cassandra
cluster would make sense, can't comment much on cloud deployment.

Thanks,
Rajesh

On Sat, Jan 12, 2019 at 8:54 AM amit sehas <cun23@yahoo.com.invalid> wrote:

> I am new to Cassandra, i am wondering how the Cassandra applications are
> deployed in the cloud. Does Cassandra have a client server architecture and
> the application is deployed as a 3rd tier that sends over queries to the
> clients, which then submit them to the Cassandra servers?  Or does the
> application submit the request directly to any of the Cassandra server
> which then decides where the query will be routed to, and then gathers the
> response and returns that to the application.
>
> Does the application accessing the data get deployed on the same nodes in
> the cloud as the Cassandra cluster itself? Or on separate nodes?  Are there
> any best practices available in this regard?
>
> thanks
>

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