I thought it will a simple performance tool for Cassandra, running simple workloads as loadtest. It ended up being a complete rabbithole investigation into the internals of the Cassandra driver. Still no luck with performance. It is somewhat slow.
bash run.read.cass.sh
java \
-Dcom.sun.management.jmxremote.ssl=false \
-Dcom.sun.management.jmxremote.authenticate=false \
-Dcom.sun.management.jmxremote.port=9010 \
-Dcom.sun.management.jmxremote.rmi.port=9011 \
-Djava.rmi.server.hostname=localhost \
-Dcom.sun.management.jmxremote.local.only=false \
-XX:+UnlockDiagnosticVMOptions -XX:+DebugNonSafepoints -XX:+PreserveFramePointer \
-XX:+UseG1GC \
-XX:MaxGCPauseMillis=20 \
-XX:InitiatingHeapOccupancyPercent=60 \
-jar target/hammer-0.1.0-standalone.jar -c conf/app.edn -m "read" -d "cassandra"
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