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
