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From SSam <>
Subject Re: Cassandra Horizontal Scalability
Date Mon, 26 Jul 2010 17:30:28 GMT

Yes, I am sending requests to newly added node also. 

Actually I am testing my web application with Cassandra, 1300 is application 
TPS  with Cassandra.   

So far we are using MYSQL, planning to move use Cassandra,  but I am getting 
better TPS with MYSQL. 

From: Benjamin Black <>
Sent: Mon, July 26, 2010 12:50:07 PM
Subject: Re: Cassandra Horizontal Scalability

Are you sending all requests to a single server?  Performance
increases when you add nodes when you send traffic to all of them at
once.  Adding new ndoes does not cause the old nodes to speed up.
Also, 1300 reqs/sec is extremely slow, so something else is likely
wrong, as well.

On Mon, Jul 26, 2010 at 8:29 AM, SSam <> wrote:
> From Cassandra Website:
> Elastic
> Read and write throughput both increase linearly as new machines are added,
> with no downtime or interruption to applications.
> I am testing TPS with Cassandra cluster.
> Initially I have tested with one node cluster , got 1300 TPS,
> added another node and I got 1200 TPS with 2 node cluster.
> TPS supposed to increase  with every additional node.  I am not sure what I
> am doing wrong?   Any suggestions on Cassandra Scalability?
> Thanks,
> Sam.

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