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
