Forgot to mention that I also used

ALTER KEYSPACE "Keyspace1" WITH REPLICATION =
  { 'class' : 'SimpleStrategy', 'replication_factor' : 3 };

To change the replication factor for Keyspace1. For some reason the command
line doesn't me to change the replication factor. I get the following error

Unable to create stress keyspace: Keyspace names must be case-insensitively
unique ("Keyspace1" conflicts with "Keyspace1")


On 29 January 2013 16:29, Jabbar <aja...@gmail.com> wrote:

> Hello,
>
> I've been testing a four identical node cassanda 1.2 cluster for a number
> of days. I have written a c# client using cassandra sharp() which inserts
> data into a table.
>
> The keyspace difinition is
>
> CREATE KEYSPACE "data"
>  WITH REPLICATION = {'class' : 'NetworkTopologyStrategy', 'dc1' : 3};
>
>
> The table definition is
>
> CREATE TABLE datapoints (
>   siteid bigint,
>   time timestamp,
>   channel int,
>  data float,
>   PRIMARY KEY ((siteid, channel),time)
> )
>
>
> I am finding that the CPU load on one of the servers stays at ~90% whilst
> the load on the other servers stays < 40%. All the servers are supposed to
> be identical.
>
> The client library I  am using does load balancing between all nodes.
>
> I have also used the cassandra stress tool as follows
>
> cassandra-stress -d 192.168.21.7,192.168.21.9,192.168.21.12,192.168.21.14
> --replication-factor 3 -n 10000000 -t 100
>
> and have found that  it behaves similarly.
>
> Can somebody explain why this happens?
>
>
>
>
> --
> Thanks
>
>  A Jabbar Azam
>



-- 
Thanks

 A Jabbar Azam

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