> > > > When I upload I notice one core of the cassandra node is full CPU (all > other cores are idleing), >
Take a look at the interrupt distribution (cat /proc/interrupts). You'll probably see disk and network interrupts mostly/all bound to CPU0. If that is the case, this article has an excellent description of the underlying issue as well as some work-arounds: http://www.alexonlinux.com/smp-affinity-and-proper-interrupt-handling-in-linux -- ----------------- Nate McCall Austin, TX @zznate Co-Founder & Sr. Technical Consultant Apache Cassandra Consulting http://www.thelastpickle.com
