Would help to know your version. 130 ops/second sounds like a ridiculously low rate. Are you doing a single host test?
On Sun, Mar 11, 2018 at 10:44 PM, onmstester onmstester <onmstes...@zoho.com > wrote: > I'm going to benchmark Cassandra's write throughput on a node with > following spec: > > - CPU: 20 Cores > - Memory: 128 GB (32 GB as Cassandra heap) > - Disk: 3 seprate disk for OS, data and commitlog > - Network: 10 Gb (test it with iperf) > - Os: Ubuntu 16 > > > Running Cassandra-stress: > cassandra-stress write n=1000000 -rate threads=1000 -mode native cql3 > -node X.X.X.X > > from two node with same spec as above, i can not get throughput more than > 130 Op/s. The clients are using less than 50% of CPU, Cassandra node uses: > > - 60% of cpu > - 30% of memory > - 30-40% util in iostat of commitlog > - 300 Mb of network bandwidth > > I suspect the network, cause no matter how many clients i run, cassandra > always using less than 300 Mb. I've done all the tuning mentioned by > datastax. > Increasing wmem_max and rmem_max did not help either. > > Sent using Zoho Mail <https://www.zoho.com/mail/> > > >
