I’m confused about read vs write performance. I was expecting to see higher write than read perf. I’m seeing the opposite by nearly 2X Please help. Am I doing/configuring something wrong or do I have the wrong expectations. I am very new to Cassandra. And this is not using Datastax. .
I have a new cluster I’m trying to estimate capacity of. · 6 nodes, 2 datacenters, 3:3 – but on the same physical network as of now · 500G SATA SSD drives benched at 250MB/s on these machines · 32 core, 2Ghz, 60G of RAM / node · Cassandra 3.11 Cassandra-stress being run on the same build as these. · Cl=LOCAL_ONE · Mixed test 4:1 · Defaults otherwise · Testing using –nodes from dci. Schema · Tweaked Cassandra-stress schema · NetworkToplogyStragety · 2 DC · 3 replicas · SizeTieredCompactionStrategy I’ve run 4:1 read to write I see ~325Kops/s I see about write to read I see ~150Kops/s Any suggestions a very much appreciated.
